Publications by authors named "Afshin Maleki"

44 Publications

Human health and ecological risk assessment of heavy metal(loid)s in agricultural soils of rural areas: A case study in Kurdistan Province, Iran.

J Environ Health Sci Eng 2020 Dec 8;18(2):469-481. Epub 2020 May 8.

Epidemiology and Biostatistics Department, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

Background: Agricultural soils pollution with heavy metal (loid) s (HMs) can create significant ecological and health problems. The aims of present study were to characterize HMs pollution profile of dry farmland soils in rural areas of Kurdistan province in Iran and evaluate potential associated ecological and health risks.

Methods: Different indices of Geo-accumulation index (I), Individual contamination factor (ICF), Nemerow composite pollution index (NCPI) and Potential Ecological Risk Index (PERI) were employed to assess the bio-accumulation of the HMs and evaluate associated ecological risks. Human health risks estimated with total hazard index (THI) and total carcinogenic risk (TCR) indices based on ingestion, inhalation and dermal exposure pathways for children and adults.

Results: As, Cd, Cr, Ni and Pb exceeded the soil standards. The spatial maps of the I showed that As pollution was at severe level in eastern part of the study region. According to the ICF results, the studied soils were extremely contaminated with As, Cd, Cr, Ni and Zn. Furthermore, based on the pollution indices, some of sampling sites were critically polluted by abovementioned HMs. For children and adults groups, the THI values in 13 and 97% of sampling sites were more than 1 and the TCR in 7 and 14% of sampling sites were more than 10, respectively. The farmland soil pollution of the study area by As and Cr were found to be quite serious and dangerous.

Conclusion: The findings of this study suggest that further attention should be paid by decision-makers to control the HMs pollution in the agricultural soils of the study area.
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http://dx.doi.org/10.1007/s40201-020-00475-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7721949PMC
December 2020

Metal Risk Assessment Study of Canned Fish Available on the Iranian Market.

Biol Trace Elem Res 2020 Nov 10. Epub 2020 Nov 10.

Faculty of Natural Resources and Environment, Birjand University, Birjand, Iran.

Iran is the largest fishery producer in the region reaching nearly 1 million tons. Fish provide a good many nutrients that are beneficial for our health. Due to significant deposits of xenobiotics in the water environments, however, fish may also be a source of non-essential metals, causing a variety of disorders. The main challenges to Iranian fisheries are environmental pollution and quality control, so this study aims to estimate the concentration of cadmium (Cd), mercury (Hg), nickel (Ni), and lead (Pb) in canned tuna fish produced and consumed in Iran. We studied four popular brands (N = 4 × 20) with ICP-MS and then looked at the concentrations and calculated the risk assessment parameters. We found that the lowest concentration was observed for Cd (18 μg/kg) and the highest for Ni (132 μg/kg). Among the brands studied, Pb concentrations differed most (42.0 to 113.3 μg/kg) and Hg levels were more consistent (24.0 and 39.4 μg/kg). The concentrations of Cd, Hg, and Pb in all the brands tested were below EU permissible thresholds. The intake estimation risk assessment parameters (EDI, contribution to PTWI, and CR) and non-cancer risk assessment parameters based on reference doses (THQ and HI) demonstrated the safety of tested products in respect to all metal concentrations studied, while the parameters regarding the toxic effects (MoE, and ILCR) showed that the consumption might cause health risks in terms of Cd (ILCR), Ni (ILCR), and Pb (MoE). The consumption of the canned fish studied should therefore be maintained at a reasonable level (2-5 meals containing fish weekly), so that it may provide necessary nutrients, while avoiding the health risk due to metal content.
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http://dx.doi.org/10.1007/s12011-020-02446-8DOI Listing
November 2020

Correction to: Influence of iron mining activity on heavy metal contamination in the sediments of the Aqyazi River, Iran.

Environ Monit Assess 2020 08 1;192(8):556. Epub 2020 Aug 1.

Department of Environmental Engineering, Catholic Kwandong University, Gangneung, 25601, South Korea.

The original version of this article unfortunately contained an error in the affiliation section and missing acknowledgment statement.
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http://dx.doi.org/10.1007/s10661-020-08524-7DOI Listing
August 2020

Photocatalytic removal of 2,4-Dichlorophenoxyacetic acid from aqueous solution using tungsten oxide doped zinc oxide nanoparticles immobilised on glass beads.

Environ Technol 2020 Aug 1:1-15. Epub 2020 Aug 1.

Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Doha, Qatar.

Groundwater is the only source of high quality water for human consumption in most parts of the world; however, it can be easily contaminated by domestic, industrial, and agricultural wastes such as fertilisers and pesticides. The main objective of the present research was to study the photocatalytic removal of 2,4-Dichlorophenoxyacetic acid pesticide (2,4-D) from aqueous media. This was a laboratory scale study in which the zinc oxide nanoparticles were doped with 0.5, 1, and 2 molar percent of tungsten oxide. The nanoparticles synthesised were characterised using powder XRD, SEM, FTIR, and UV-Vis Spectroscopy analyses. During the photodegradation of 2,4-D, the operational parameters studied were pH, nanoparticles dosage, initial pesticide concentration, light intensity, contact time, and the mineralisation trend of organic matter. It was found that the doped nanoparticles had a smaller band gap energy, which confirms the effect of doping. The percentage of the dopant can affect the pesticide removal efficiency. The optimal pH value obtained was 7. In addition, the process efficiency, increased from 27% to 78% with increasing UV light intensity from 172 to 505 W/m respectively. Moreover, it was found that, with increasing light intensity, contact time and nanoparticle concentration all caused the pesticide removal efficiency to be increased too. In addition, the increase of the pesticide concentration would cause a reduction in the process removal efficiency. This study indicated that the photocatalytic process using tungsten doped zinc oxide nanoparticles can remove the 2,4-D pesticide by around 80% from the aquatic environment.
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http://dx.doi.org/10.1080/09593330.2020.1797901DOI Listing
August 2020

Influence of iron mining activity on heavy metal contamination in the sediments of the Aqyazi River, Iran.

Environ Monit Assess 2020 Jul 15;192(8):521. Epub 2020 Jul 15.

Department of Environmental Engineering, Catholic Kwandong University, Gangneung, 25601, South Korea.

In order to investigate the degree of contamination of heavy metals (As, Cd, Cr, Cu, Fe, Pb, and Ni) in the Aqyazi River in Iran, sediment samples were collected from the river receiving wastewater from an iron-manufacturing plant. For this study, contamination indices, geoaccumulation index (I), contamination factor (CF), and pollution load index (PLI), were used to assess contamination by the heavy metals. The results of the I indicated that the sediments were moderately contaminated by Cu and strongly to extremely contaminated by Cd. Based on spatial distribution of concentrations and the I, mining activity was the source of Cu and Cd in the Aqyazi River. Furthermore, the elevated I of Cd at upmost northern station was not influenced by the mining activity, suggesting that there may be another upstream anthropogenic source of Cd. The CF values indicated the same trend as the Igeo. The PLI was calculated using all the metals analyzed in this study, and displayed that the sediments were not polluted. However, the PLI was re-calculated using only Cu and Cd and indicated that the sediments were polluted. Our results suggest further studies to trace another source of Cd upstream of the Aqyazi River and to investigate influence of the river waters on accumulation of heavy metals in soils and vegetables downstream.
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http://dx.doi.org/10.1007/s10661-020-08466-0DOI Listing
July 2020

The nitrate content of fresh and cooked vegetables and their health-related risks.

PLoS One 2020 9;15(1):e0227551. Epub 2020 Jan 9.

Faculty of Social Sciences, imec-mict-Ghent University, Ghent, Belgium.

Background: Vegetables are the most important source of nitrates in the human diet. During various processes in the body, nitrates are converted into nitrites, which causes various diseases, such as blue baby syndrome and cancer. This study aimed to determine the concentration of nitrates in several vegetable farms in Sanandaj city and to evaluate their health-related risks.

Methods: This descriptive cross-sectional study was conducted from October 2017 to July 2018. A total of 90 samples were taken from nine farms. Soil and water sampling was also carried out. All stages of sample preparation and extraction were carried out according to Food Standards 2-16721, and the nitrate measurements were performed using ion chromatography (Compact IC Plus 882 Model, Metrohm, Switzerland). A health risk assessment was performed using the non-carcinogenic risk assessment.

Results: This study's results showed that the nitrate concertation in all vegetables was less than National Iranian Vegetable Nitrate Standard. Nitrate levels in leafy vegetables were higher than in root vegetables, and the root vegetables levels were higher than those in Fruit vegetable. The nitrate level in vegetables in autumn was higher than in spring. The cooking process reduced the raw vegetables' nitrate content from 4.094% to 13.407%, while the frying process increased the vegetables' nitrate content from 12.46% to 29.93%. The highest health risk level in raw, cooked and fried vegetables was parsley, parsley and beet leaves, respectively, and the lowest in all categories was tomatoes. Generally, the highest health risk was related to fried beet leaves, and the lowest was raw tomatoes. In addition, each of the abovementioned relationships between vegetables' nitrate levels and the harvest season, type of processing procedure and type of vegetables was significant (p < 0.05). The irrigation water's nitrate concentration in all fields was between 12.36 and 33.14 mg/l. The soil contained nitrate levels of between 4.35 and 9.7 mg/kg.

Conclusion: Based on this study, we can conclude that the amount of nitrates in raw vegetables was lower than the standard limit's level and that this level does not cause health problems for consumers.
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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0227551PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6952105PMC
April 2020

Construction of manganese oxide nanowire-like cluster arrays on a DNA template: Application to detection of hydrogen peroxide.

Bioelectrochemistry 2020 Apr 2;132:107419. Epub 2019 Dec 2.

Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Improved electron transfer properties and catalytic activity of manganese oxide (MnOx) was demonstrated following its electrochemical deposition on a deoxyribonucleic acid (DNA) modified glassy carbon electrode. The MnOx showed different morphologies, electrocatalytic properties and electrochemical kinetics. Scanning electron microscopy showed that electrodeposition of MnOx on a bare glassy carbon electrode led to the formation of irregular-shapes while a nanowire cluster (NWC) was formed on a GCE/DNA due to the DNA serving as a template. Electrochemical impedance spectroscopy (EIS) revealed lower charge transfer resistance of the MnOxNWC compared with MnOx. A new mechanism is presented for the electrodeposition of MnOx on the surface of a GC/DNA electrode. An electrochemical biosensor was fabricated based on depositing MnOx onto a glassy carbon /DNA electrode (GCE/DNA/MnOxNWC) and was used to detect hydrogen peroxide (HO). The MnOx nanowire cluster and DNA exhibited significant electrocatalytic activity for simultaneous electrocatalytic oxidation at two oxidation potentials (0.6 V and 0.98 V vs Ag/AgCl) and one reduction potential (-0.5 V vs Ag/AgCl) for HO at pH 6.0. A new mechanism for the detection of HO is presented. Excellent electrocatalytic activity, stability and facility for simultaneous detection of HO at different of applied potentials are proposed advantages of the proposed electrochemical biosensor.
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http://dx.doi.org/10.1016/j.bioelechem.2019.107419DOI Listing
April 2020

Mapping 123 million neonatal, infant and child deaths between 2000 and 2017.

Authors:
Roy Burstein Nathaniel J Henry Michael L Collison Laurie B Marczak Amber Sligar Stefanie Watson Neal Marquez Mahdieh Abbasalizad-Farhangi Masoumeh Abbasi Foad Abd-Allah Amir Abdoli Mohammad Abdollahi Ibrahim Abdollahpour Rizwan Suliankatchi Abdulkader Michael R M Abrigo Dilaram Acharya Oladimeji M Adebayo Victor Adekanmbi Davoud Adham Mahdi Afshari Mohammad Aghaali Keivan Ahmadi Mehdi Ahmadi Ehsan Ahmadpour Rushdia Ahmed Chalachew Genet Akal Joshua O Akinyemi Fares Alahdab Noore Alam Genet Melak Alamene Kefyalew Addis Alene Mehran Alijanzadeh Cyrus Alinia Vahid Alipour Syed Mohamed Aljunid Mohammed J Almalki Hesham M Al-Mekhlafi Khalid Altirkawi Nelson Alvis-Guzman Adeladza Kofi Amegah Saeed Amini Arianna Maever Loreche Amit Zohreh Anbari Sofia Androudi Mina Anjomshoa Fereshteh Ansari Carl Abelardo T Antonio Jalal Arabloo Zohreh Arefi Olatunde Aremu Bahram Armoon Amit Arora Al Artaman Anvar Asadi Mehran Asadi-Aliabadi Amir Ashraf-Ganjouei Reza Assadi Bahar Ataeinia Sachin R Atre Beatriz Paulina Ayala Quintanilla Martin Amogre Ayanore Samad Azari Ebrahim Babaee Arefeh Babazadeh Alaa Badawi Soghra Bagheri Mojtaba Bagherzadeh Nafiseh Baheiraei Abbas Balouchi Aleksandra Barac Quique Bassat Bernhard T Baune Mohsen Bayati Neeraj Bedi Ettore Beghi Masoud Behzadifar Meysam Behzadifar Yared Belete Belay Brent Bell Michelle L Bell Dessalegn Ajema Berbada Robert S Bernstein Natalia V Bhattacharjee Suraj Bhattarai Zulfiqar A Bhutta Ali Bijani Somayeh Bohlouli Nicholas J K Breitborde Gabrielle Britton Annie J Browne Sharath Burugina Nagaraja Reinhard Busse Zahid A Butt Josip Car Rosario Cárdenas Carlos A Castañeda-Orjuela Ester Cerin Wagaye Fentahun Chanie Pranab Chatterjee Dinh-Toi Chu Cyrus Cooper Vera M Costa Koustuv Dalal Lalit Dandona Rakhi Dandona Farah Daoud Ahmad Daryani Rajat Das Gupta Ian Davis Nicole Davis Weaver Dragos Virgil Davitoiu Jan-Walter De Neve Feleke Mekonnen Demeke Gebre Teklemariam Demoz Kebede Deribe Rupak Desai Aniruddha Deshpande Hanna Demelash Desyibelew Sagnik Dey Samath Dhamminda Dharmaratne Meghnath Dhimal Daniel Diaz Leila Doshmangir Andre R Duraes Laura Dwyer-Lindgren Lucas Earl Roya Ebrahimi Soheil Ebrahimpour Andem Effiong Aziz Eftekhari Elham Ehsani-Chimeh Iman El Sayed Maysaa El Sayed Zaki Maha El Tantawi Ziad El-Khatib Mohammad Hassan Emamian Shymaa Enany Sharareh Eskandarieh Oghenowede Eyawo Maha Ezalarab Mahbobeh Faramarzi Mohammad Fareed Roghiyeh Faridnia Andre Faro Ali Akbar Fazaeli Mehdi Fazlzadeh Netsanet Fentahun Seyed-Mohammad Fereshtehnejad João C Fernandes Irina Filip Florian Fischer Nataliya A Foigt Masoud Foroutan Joel Msafiri Francis Takeshi Fukumoto Nancy Fullman Silvano Gallus Destallem Gebremedhin Gebre Tsegaye Tewelde Gebrehiwot Gebreamlak Gebremedhn Gebremeskel Bradford D Gessner Birhanu Geta Peter W Gething Reza Ghadimi Keyghobad Ghadiri Mahsa Ghajarzadeh Ahmad Ghashghaee Paramjit Singh Gill Tiffany K Gill Nick Golding Nelson G M Gomes Philimon N Gona Sameer Vali Gopalani Giuseppe Gorini Bárbara Niegia Garcia Goulart Nicholas Graetz Felix Greaves Manfred S Green Yuming Guo Arvin Haj-Mirzaian Arya Haj-Mirzaian Brian James Hall Samer Hamidi Hamidreza Haririan Josep Maria Haro Milad Hasankhani Edris Hasanpoor Amir Hasanzadeh Hadi Hassankhani Hamid Yimam Hassen Mohamed I Hegazy Delia Hendrie Fatemeh Heydarpour Thomas R Hird Chi Linh Hoang Gillian Hollerich Enayatollah Homaie Rad Mojtaba Hoseini-Ghahfarokhi Naznin Hossain Mostafa Hosseini Mehdi Hosseinzadeh Mihaela Hostiuc Sorin Hostiuc Mowafa Househ Mohamed Hsairi Olayinka Stephen Ilesanmi Mohammad Hasan Imani-Nasab Usman Iqbal Seyed Sina Naghibi Irvani Nazrul Islam Sheikh Mohammed Shariful Islam Mikk Jürisson Nader Jafari Balalami Amir Jalali Javad Javidnia Achala Upendra Jayatilleke Ensiyeh Jenabi John S Ji Yash B Jobanputra Kimberly Johnson Jost B Jonas Zahra Jorjoran Shushtari Jacek Jerzy Jozwiak Ali Kabir Amaha Kahsay Hamed Kalani Rohollah Kalhor Manoochehr Karami Surendra Karki Amir Kasaeian Nicholas J Kassebaum Peter Njenga Keiyoro Grant Rodgers Kemp Roghayeh Khabiri Yousef Saleh Khader Morteza Abdullatif Khafaie Ejaz Ahmad Khan Junaid Khan Muhammad Shahzeb Khan Young-Ho Khang Khaled Khatab Amir Khater Mona M Khater Alireza Khatony Mohammad Khazaei Salman Khazaei Maryam Khazaei-Pool Jagdish Khubchandani Neda Kianipour Yun Jin Kim Ruth W Kimokoti Damaris K Kinyoki Adnan Kisa Sezer Kisa Tufa Kolola Soewarta Kosen Parvaiz A Koul Ai Koyanagi Moritz U G Kraemer Kewal Krishan Kris J Krohn Nuworza Kugbey G Anil Kumar Manasi Kumar Pushpendra Kumar Desmond Kuupiel Ben Lacey Sheetal D Lad Faris Hasan Lami Anders O Larsson Paul H Lee Mostafa Leili Aubrey J Levine Shanshan Li Lee-Ling Lim Stefan Listl Joshua Longbottom Jaifred Christian F Lopez Stefan Lorkowski Sameh Magdeldin Hassan Magdy Abd El Razek Muhammed Magdy Abd El Razek Azeem Majeed Afshin Maleki Reza Malekzadeh Deborah Carvalho Malta Abdullah A Mamun Navid Manafi Ana-Laura Manda Morteza Mansourian Francisco Rogerlândio Martins-Melo Anthony Masaka Benjamin Ballard Massenburg Pallab K Maulik Benjamin K Mayala Mohsen Mazidi Martin McKee Ravi Mehrotra Kala M Mehta Gebrekiros Gebremichael Meles Walter Mendoza Ritesh G Menezes Atte Meretoja Tuomo J Meretoja Tomislav Mestrovic Ted R Miller Molly K Miller-Petrie Edward J Mills George J Milne G K Mini Seyed Mostafa Mir Hamed Mirjalali Erkin M Mirrakhimov Efat Mohamadi Dara K Mohammad Aso Mohammad Darwesh Naser Mohammad Gholi Mezerji Ammas Siraj Mohammed Shafiu Mohammed Ali H Mokdad Mariam Molokhia Lorenzo Monasta Yoshan Moodley Mahmood Moosazadeh Ghobad Moradi Masoud Moradi Yousef Moradi Maziar Moradi-Lakeh Mehdi Moradinazar Paula Moraga Lidia Morawska Abbas Mosapour Seyyed Meysam Mousavi Ulrich Otto Mueller Atalay Goshu Muluneh Ghulam Mustafa Behnam Nabavizadeh Mehdi Naderi Ahamarshan Jayaraman Nagarajan Azin Nahvijou Farid Najafi Vinay Nangia Duduzile Edith Ndwandwe Nahid Neamati Ionut Negoi Ruxandra Irina Negoi Josephine W Ngunjiri Huong Lan Thi Nguyen Long Hoang Nguyen Son Hoang Nguyen Katie R Nielsen Dina Nur Anggraini Ningrum Yirga Legesse Nirayo Molly R Nixon Chukwudi A Nnaji Marzieh Nojomi Mehdi Noroozi Shirin Nosratnejad Jean Jacques Noubiap Soraya Nouraei Motlagh Richard Ofori-Asenso Felix Akpojene Ogbo Kelechi E Oladimeji Andrew T Olagunju Meysam Olfatifar Solomon Olum Bolajoko Olubukunola Olusanya Mojisola Morenike Oluwasanu Obinna E Onwujekwe Eyal Oren Doris D V Ortega-Altamirano Alberto Ortiz Osayomwanbo Osarenotor Frank B Osei Aaron E Osgood-Zimmerman Stanislav S Otstavnov Mayowa Ojo Owolabi Mahesh P A Abdol Sattar Pagheh Smita Pakhale Songhomitra Panda-Jonas Animika Pandey Eun-Kee Park Hadi Parsian Tahereh Pashaei Sangram Kishor Patel Veincent Christian Filipino Pepito Alexandre Pereira Samantha Perkins Brandon V Pickering Thomas Pilgrim Majid Pirestani Bakhtiar Piroozi Meghdad Pirsaheb Oleguer Plana-Ripoll Hadi Pourjafar Parul Puri Mostafa Qorbani Hedley Quintana Mohammad Rabiee Navid Rabiee Amir Radfar Alireza Rafiei Fakher Rahim Zohreh Rahimi Vafa Rahimi-Movaghar Shadi Rahimzadeh Fatemeh Rajati Sree Bhushan Raju Azra Ramezankhani Chhabi Lal Ranabhat Davide Rasella Vahid Rashedi Lal Rawal Robert C Reiner Andre M N Renzaho Satar Rezaei Aziz Rezapour Seyed Mohammad Riahi Ana Isabel Ribeiro Leonardo Roever Elias Merdassa Roro Max Roser Gholamreza Roshandel Daem Roshani Ali Rostami Enrico Rubagotti Salvatore Rubino Siamak Sabour Nafis Sadat Ehsan Sadeghi Reza Saeedi Yahya Safari Roya Safari-Faramani Mahdi Safdarian Amirhossein Sahebkar Mohammad Reza Salahshoor Nasir Salam Payman Salamati Farkhonde Salehi Saleh Salehi Zahabi Yahya Salimi Hamideh Salimzadeh Joshua A Salomon Evanson Zondani Sambala Abdallah M Samy Milena M Santric Milicevic Bruno Piassi Sao Jose Sivan Yegnanarayana Iyer Saraswathy Rodrigo Sarmiento-Suárez Benn Sartorius Brijesh Sathian Sonia Saxena Alyssa N Sbarra Lauren E Schaeffer David C Schwebel Sadaf G Sepanlou Seyedmojtaba Seyedmousavi Faramarz Shaahmadi Masood Ali Shaikh Mehran Shams-Beyranvand Amir Shamshirian Morteza Shamsizadeh Kiomars Sharafi Mehdi Sharif Mahdi Sharif-Alhoseini Hamid Sharifi Jayendra Sharma Rajesh Sharma Aziz Sheikh Chloe Shields Mika Shigematsu Rahman Shiri Ivy Shiue Kerem Shuval Tariq J Siddiqi João Pedro Silva Jasvinder A Singh Dhirendra Narain Sinha Malede Mequanent Sisay Solomon Sisay Karen Sliwa David L Smith Ranjani Somayaji Moslem Soofi Joan B Soriano Chandrashekhar T Sreeramareddy Agus Sudaryanto Mu'awiyyah Babale Sufiyan Bryan L Sykes P N Sylaja Rafael Tabarés-Seisdedos Karen M Tabb Takahiro Tabuchi Nuno Taveira Mohamad-Hani Temsah Abdullah Sulieman Terkawi Zemenu Tadesse Tessema Kavumpurathu Raman Thankappan Sathish Thirunavukkarasu Quyen G To Marcos Roberto Tovani-Palone Bach Xuan Tran Khanh Bao Tran Irfan Ullah Muhammad Shariq Usman Olalekan A Uthman Amir Vahedian-Azimi Pascual R Valdez Job F M van Boven Tommi Juhani Vasankari Yasser Vasseghian Yousef Veisani Narayanaswamy Venketasubramanian Francesco S Violante Sergey Konstantinovitch Vladimirov Vasily Vlassov Theo Vos Giang Thu Vu Isidora S Vujcic Yasir Waheed Jon Wakefield Haidong Wang Yafeng Wang Yuan-Pang Wang Joseph L Ward Robert G Weintraub Kidu Gidey Weldegwergs Girmay Teklay Weldesamuel Ronny Westerman Charles Shey Wiysonge Dawit Zewdu Wondafrash Lauren Woyczynski Ai-Min Wu Gelin Xu Abbas Yadegar Tomohide Yamada Vahid Yazdi-Feyzabadi Christopher Sabo Yilgwan Paul Yip Naohiro Yonemoto Javad Yoosefi Lebni Mustafa Z Younis Mahmoud Yousefifard Hebat-Allah Salah A Yousof Chuanhua Yu Hasan Yusefzadeh Erfan Zabeh Telma Zahirian Moghadam Sojib Bin Zaman Mohammad Zamani Hamed Zandian Alireza Zangeneh Taddese Alemu Zerfu Yunquan Zhang Arash Ziapour Sanjay Zodpey Christopher J L Murray Simon I Hay

Nature 2019 10 16;574(7778):353-358. Epub 2019 Oct 16.

Institute for Health Metrics and Evaluation, University of Washington, Seattle, WA, USA.

Since 2000, many countries have achieved considerable success in improving child survival, but localized progress remains unclear. To inform efforts towards United Nations Sustainable Development Goal 3.2-to end preventable child deaths by 2030-we need consistently estimated data at the subnational level regarding child mortality rates and trends. Here we quantified, for the period 2000-2017, the subnational variation in mortality rates and number of deaths of neonates, infants and children under 5 years of age within 99 low- and middle-income countries using a geostatistical survival model. We estimated that 32% of children under 5 in these countries lived in districts that had attained rates of 25 or fewer child deaths per 1,000 live births by 2017, and that 58% of child deaths between 2000 and 2017 in these countries could have been averted in the absence of geographical inequality. This study enables the identification of high-mortality clusters, patterns of progress and geographical inequalities to inform appropriate investments and implementations that will help to improve the health of all populations.
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http://dx.doi.org/10.1038/s41586-019-1545-0DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6800389PMC
October 2019

Global, Regional, and National Cancer Incidence, Mortality, Years of Life Lost, Years Lived With Disability, and Disability-Adjusted Life-Years for 29 Cancer Groups, 1990 to 2017: A Systematic Analysis for the Global Burden of Disease Study.

Authors:
Christina Fitzmaurice Degu Abate Naghmeh Abbasi Hedayat Abbastabar Foad Abd-Allah Omar Abdel-Rahman Ahmed Abdelalim Amir Abdoli Ibrahim Abdollahpour Abdishakur S M Abdulle Nebiyu Dereje Abebe Haftom Niguse Abraha Laith Jamal Abu-Raddad Ahmed Abualhasan Isaac Akinkunmi Adedeji Shailesh M Advani Mohsen Afarideh Mahdi Afshari Mohammad Aghaali Dominic Agius Sutapa Agrawal Ayat Ahmadi Elham Ahmadian Ehsan Ahmadpour Muktar Beshir Ahmed Mohammad Esmaeil Akbari Tomi Akinyemiju Ziyad Al-Aly Assim M AlAbdulKader Fares Alahdab Tahiya Alam Genet Melak Alamene Birhan Tamene T Alemnew Kefyalew Addis Alene Cyrus Alinia Vahid Alipour Syed Mohamed Aljunid Fatemeh Allah Bakeshei Majid Abdulrahman Hamad Almadi Amir Almasi-Hashiani Ubai Alsharif Shirina Alsowaidi Nelson Alvis-Guzman Erfan Amini Saeed Amini Yaw Ampem Amoako Zohreh Anbari Nahla Hamed Anber Catalina Liliana Andrei Mina Anjomshoa Fereshteh Ansari Ansariadi Ansariadi Seth Christopher Yaw Appiah Morteza Arab-Zozani Jalal Arabloo Zohreh Arefi Olatunde Aremu Habtamu Abera Areri Al Artaman Hamid Asayesh Ephrem Tsegay Asfaw Alebachew Fasil Ashagre Reza Assadi Bahar Ataeinia Hagos Tasew Atalay Zerihun Ataro Suleman Atique Marcel Ausloos Leticia Avila-Burgos Euripide F G A Avokpaho Ashish Awasthi Nefsu Awoke Beatriz Paulina Ayala Quintanilla Martin Amogre Ayanore Henok Tadesse Ayele Ebrahim Babaee Umar Bacha Alaa Badawi Mojtaba Bagherzadeh Eleni Bagli Senthilkumar Balakrishnan Abbas Balouchi Till Winfried Bärnighausen Robert J Battista Masoud Behzadifar Meysam Behzadifar Bayu Begashaw Bekele Yared Belete Belay Yaschilal Muche Belayneh Kathleen Kim Sachiko Berfield Adugnaw Berhane Eduardo Bernabe Mircea Beuran Nickhill Bhakta Krittika Bhattacharyya Belete Biadgo Ali Bijani Muhammad Shahdaat Bin Sayeed Charles Birungi Catherine Bisignano Helen Bitew Tone Bjørge Archie Bleyer Kassawmar Angaw Bogale Hunduma Amensisa Bojia Antonio M Borzì Cristina Bosetti Ibrahim R Bou-Orm Hermann Brenner Jerry D Brewer Andrey Nikolaevich Briko Nikolay Ivanovich Briko Maria Teresa Bustamante-Teixeira Zahid A Butt Giulia Carreras Juan J Carrero Félix Carvalho Clara Castro Franz Castro Ferrán Catalá-López Ester Cerin Yazan Chaiah Wagaye Fentahun Chanie Vijay Kumar Chattu Pankaj Chaturvedi Neelima Singh Chauhan Mohammad Chehrazi Peggy Pei-Chia Chiang Tesfaye Yitna Chichiabellu Onyema Greg Chido-Amajuoyi Odgerel Chimed-Ochir Jee-Young J Choi Devasahayam J Christopher Dinh-Toi Chu Maria-Magdalena Constantin Vera M Costa Emanuele Crocetti Christopher Stephen Crowe Maria Paula Curado Saad M A Dahlawi Giovanni Damiani Amira Hamed Darwish Ahmad Daryani José das Neves Feleke Mekonnen Demeke Asmamaw Bizuneh Demis Birhanu Wondimeneh Demissie Gebre Teklemariam Demoz Edgar Denova-Gutiérrez Afshin Derakhshani Kalkidan Solomon Deribe Rupak Desai Beruk Berhanu Desalegn Melaku Desta Subhojit Dey Samath Dhamminda Dharmaratne Meghnath Dhimal Daniel Diaz Mesfin Tadese Tadese Dinberu Shirin Djalalinia David Teye Doku Thomas M Drake Manisha Dubey Eleonora Dubljanin Eyasu Ejeta Duken Hedyeh Ebrahimi Andem Effiong Aziz Eftekhari Iman El Sayed Maysaa El Sayed Zaki Shaimaa I El-Jaafary Ziad El-Khatib Demelash Abewa Elemineh Hajer Elkout Richard G Ellenbogen Aisha Elsharkawy Mohammad Hassan Emamian Daniel Adane Endalew Aman Yesuf Endries Babak Eshrati Ibtihal Fadhil Vahid Fallah Omrani Mahbobeh Faramarzi Mahdieh Abbasalizad Farhangi Andrea Farioli Farshad Farzadfar Netsanet Fentahun Eduarda Fernandes Garumma Tolu Feyissa Irina Filip Florian Fischer James L Fisher Lisa M Force Masoud Foroutan Marisa Freitas Takeshi Fukumoto Neal D Futran Silvano Gallus Fortune Gbetoho Gankpe Reta Tsegaye Gayesa Tsegaye Tewelde Gebrehiwot Gebreamlak Gebremedhn Gebremeskel Getnet Azeze Gedefaw Belayneh K Gelaw Birhanu Geta Sefonias Getachew Kebede Embaye Gezae Mansour Ghafourifard Alireza Ghajar Ahmad Ghashghaee Asadollah Gholamian Paramjit Singh Gill Themba T G Ginindza Alem Girmay Muluken Gizaw Ricardo Santiago Gomez Sameer Vali Gopalani Giuseppe Gorini Bárbara Niegia Garcia Goulart Ayman Grada Maximiliano Ribeiro Guerra Andre Luiz Sena Guimaraes Prakash C Gupta Rahul Gupta Kishor Hadkhale Arvin Haj-Mirzaian Arya Haj-Mirzaian Randah R Hamadeh Samer Hamidi Lolemo Kelbiso Hanfore Josep Maria Haro Milad Hasankhani Amir Hasanzadeh Hamid Yimam Hassen Roderick J Hay Simon I Hay Andualem Henok Nathaniel J Henry Claudiu Herteliu Hagos D Hidru Chi Linh Hoang Michael K Hole Praveen Hoogar Nobuyuki Horita H Dean Hosgood Mostafa Hosseini Mehdi Hosseinzadeh Mihaela Hostiuc Sorin Hostiuc Mowafa Househ Mohammedaman Mama Hussen Bogdan Ileanu Milena D Ilic Kaire Innos Seyed Sina Naghibi Irvani Kufre Robert Iseh Sheikh Mohammed Shariful Islam Farhad Islami Nader Jafari Balalami Morteza Jafarinia Leila Jahangiry Mohammad Ali Jahani Nader Jahanmehr Mihajlo Jakovljevic Spencer L James Mehdi Javanbakht Sudha Jayaraman Sun Ha Jee Ensiyeh Jenabi Ravi Prakash Jha Jost B Jonas Jitendra Jonnagaddala Tamas Joo Suresh Banayya Jungari Mikk Jürisson Ali Kabir Farin Kamangar André Karch Narges Karimi Ansar Karimian Amir Kasaeian Gebremicheal Gebreslassie Kasahun Belete Kassa Tesfaye Dessale Kassa Mesfin Wudu Kassaw Anil Kaul Peter Njenga Keiyoro Abraham Getachew Kelbore Amene Abebe Kerbo Yousef Saleh Khader Maryam Khalilarjmandi Ejaz Ahmad Khan Gulfaraz Khan Young-Ho Khang Khaled Khatab Amir Khater Maryam Khayamzadeh Maryam Khazaee-Pool Salman Khazaei Abdullah T Khoja Mohammad Hossein Khosravi Jagdish Khubchandani Neda Kianipour Daniel Kim Yun Jin Kim Adnan Kisa Sezer Kisa Katarzyna Kissimova-Skarbek Hamidreza Komaki Ai Koyanagi Kristopher J Krohn Burcu Kucuk Bicer Nuworza Kugbey Vivek Kumar Desmond Kuupiel Carlo La Vecchia Deepesh P Lad Eyasu Alem Lake Ayenew Molla Lakew Dharmesh Kumar Lal Faris Hasan Lami Qing Lan Savita Lasrado Paolo Lauriola Jeffrey V Lazarus James Leigh Cheru Tesema Leshargie Yu Liao Miteku Andualem Limenih Stefan Listl Alan D Lopez Platon D Lopukhov Raimundas Lunevicius Mohammed Madadin Sameh Magdeldin Hassan Magdy Abd El Razek Azeem Majeed Afshin Maleki Reza Malekzadeh Ali Manafi Navid Manafi Wondimu Ayele Manamo Morteza Mansourian Mohammad Ali Mansournia Lorenzo Giovanni Mantovani Saman Maroufizadeh Santi Martini S Martini Tivani Phosa Mashamba-Thompson Benjamin Ballard Massenburg Motswadi Titus Maswabi Manu Raj Mathur Colm McAlinden Martin McKee Hailemariam Abiy Alemu Meheretu Ravi Mehrotra Varshil Mehta Toni Meier Yohannes A Melaku Gebrekiros Gebremichael Meles Hagazi Gebre Meles Addisu Melese Mulugeta Melku Peter T N Memiah Walter Mendoza Ritesh G Menezes Shahin Merat Tuomo J Meretoja Tomislav Mestrovic Bartosz Miazgowski Tomasz Miazgowski Kebadnew Mulatu M Mihretie Ted R Miller Edward J Mills Seyed Mostafa Mir Hamed Mirzaei Hamid Reza Mirzaei Rashmi Mishra Babak Moazen Dara K Mohammad Karzan Abdulmuhsin Mohammad Yousef Mohammad Aso Mohammad Darwesh Abolfazl Mohammadbeigi Hiwa Mohammadi Moslem Mohammadi Mahdi Mohammadian Abdollah Mohammadian-Hafshejani Milad Mohammadoo-Khorasani Reza Mohammadpourhodki Ammas Siraj Mohammed Jemal Abdu Mohammed Shafiu Mohammed Farnam Mohebi Ali H Mokdad Lorenzo Monasta Yoshan Moodley Mahmood Moosazadeh Maryam Moossavi Ghobad Moradi Mohammad Moradi-Joo Maziar Moradi-Lakeh Farhad Moradpour Lidia Morawska Joana Morgado-da-Costa Naho Morisaki Shane Douglas Morrison Abbas Mosapour Seyyed Meysam Mousavi Achenef Asmamaw Muche Oumer Sada S Muhammed Jonah Musa Ashraf F Nabhan Mehdi Naderi Ahamarshan Jayaraman Nagarajan Gabriele Nagel Azin Nahvijou Gurudatta Naik Farid Najafi Luigi Naldi Hae Sung Nam Naser Nasiri Javad Nazari Ionut Negoi Subas Neupane Polly A Newcomb Haruna Asura Nggada Josephine W Ngunjiri Cuong Tat Nguyen Leila Nikniaz Dina Nur Anggraini Ningrum Yirga Legesse Nirayo Molly R Nixon Chukwudi A Nnaji Marzieh Nojomi Shirin Nosratnejad Malihe Nourollahpour Shiadeh Mohammed Suleiman Obsa Richard Ofori-Asenso Felix Akpojene Ogbo In-Hwan Oh Andrew T Olagunju Tinuke O Olagunju Mojisola Morenike Oluwasanu Abidemi E Omonisi Obinna E Onwujekwe Anu Mary Oommen Eyal Oren Doris D V Ortega-Altamirano Erika Ota Stanislav S Otstavnov Mayowa Ojo Owolabi Mahesh P A Jagadish Rao Padubidri Smita Pakhale Amir H Pakpour Adrian Pana Eun-Kee Park Hadi Parsian Tahereh Pashaei Shanti Patel Snehal T Patil Alyssa Pennini David M Pereira Cristiano Piccinelli Julian David Pillay Majid Pirestani Farhad Pishgar Maarten J Postma Hadi Pourjafar Farshad Pourmalek Akram Pourshams Swayam Prakash Narayan Prasad Mostafa Qorbani Mohammad Rabiee Navid Rabiee Amir Radfar Alireza Rafiei Fakher Rahim Mahdi Rahimi Muhammad Aziz Rahman Fatemeh Rajati Saleem M Rana Samira Raoofi Goura Kishor Rath David Laith Rawaf Salman Rawaf Robert C Reiner Andre M N Renzaho Nima Rezaei Aziz Rezapour Ana Isabel Ribeiro Daniela Ribeiro Luca Ronfani Elias Merdassa Roro Gholamreza Roshandel Ali Rostami Ragy Safwat Saad Parisa Sabbagh Siamak Sabour Basema Saddik Saeid Safiri Amirhossein Sahebkar Mohammad Reza Salahshoor Farkhonde Salehi Hosni Salem Marwa Rashad Salem Hamideh Salimzadeh Joshua A Salomon Abdallah M Samy Juan Sanabria Milena M Santric Milicevic Benn Sartorius Arash Sarveazad Brijesh Sathian Maheswar Satpathy Miloje Savic Monika Sawhney Mehdi Sayyah Ione J C Schneider Ben Schöttker Mario Sekerija Sadaf G Sepanlou Masood Sepehrimanesh Seyedmojtaba Seyedmousavi Faramarz Shaahmadi Hosein Shabaninejad Mohammad Shahbaz Masood Ali Shaikh Amir Shamshirian Morteza Shamsizadeh Heidar Sharafi Zeinab Sharafi Mehdi Sharif Ali Sharifi Hamid Sharifi Rajesh Sharma Aziz Sheikh Reza Shirkoohi Sharvari Rahul Shukla Si Si Soraya Siabani Diego Augusto Santos Silva Dayane Gabriele Alves Silveira Ambrish Singh Jasvinder A Singh Solomon Sisay Freddy Sitas Eugène Sobngwi Moslem Soofi Joan B Soriano Vasiliki Stathopoulou Mu'awiyyah Babale Sufiyan Rafael Tabarés-Seisdedos Takahiro Tabuchi Ken Takahashi Omid Reza Tamtaji Mohammed Rasoul Tarawneh Segen Gebremeskel Tassew Parvaneh Taymoori Arash Tehrani-Banihashemi Mohamad-Hani Temsah Omar Temsah Berhe Etsay Tesfay Fisaha Haile Tesfay Manaye Yihune Teshale Gizachew Assefa Tessema Subash Thapa Kenean Getaneh Tlaye Roman Topor-Madry Marcos Roberto Tovani-Palone Eugenio Traini Bach Xuan Tran Khanh Bao Tran Afewerki Gebremeskel Tsadik Irfan Ullah Olalekan A Uthman Marco Vacante Maryam Vaezi Patricia Varona Pérez Yousef Veisani Simone Vidale Francesco S Violante Vasily Vlassov Stein Emil Vollset Theo Vos Kia Vosoughi Giang Thu Vu Isidora S Vujcic Henry Wabinga Tesfahun Mulatu Wachamo Fasil Shiferaw Wagnew Yasir Waheed Fitsum Weldegebreal Girmay Teklay Weldesamuel Tissa Wijeratne Dawit Zewdu Wondafrash Tewodros Eshete Wonde Adam Belay Wondmieneh Hailemariam Mekonnen Workie Rajaram Yadav Abbas Yadegar Ali Yadollahpour Mehdi Yaseri Vahid Yazdi-Feyzabadi Alex Yeshaneh Mohammed Ahmed Yimam Ebrahim M Yimer Engida Yisma Naohiro Yonemoto Mustafa Z Younis Bahman Yousefi Mahmoud Yousefifard Chuanhua Yu Erfan Zabeh Vesna Zadnik Telma Zahirian Moghadam Zoubida Zaidi Mohammad Zamani Hamed Zandian Alireza Zangeneh Leila Zaki Kazem Zendehdel Zerihun Menlkalew Zenebe Taye Abuhay Zewale Arash Ziapour Sanjay Zodpey Christopher J L Murray

JAMA Oncol 2019 12;5(12):1749-1768

Institute for Health Metrics and Evaluation, University of Washington, Seattle.

Importance: Cancer and other noncommunicable diseases (NCDs) are now widely recognized as a threat to global development. The latest United Nations high-level meeting on NCDs reaffirmed this observation and also highlighted the slow progress in meeting the 2011 Political Declaration on the Prevention and Control of Noncommunicable Diseases and the third Sustainable Development Goal. Lack of situational analyses, priority setting, and budgeting have been identified as major obstacles in achieving these goals. All of these have in common that they require information on the local cancer epidemiology. The Global Burden of Disease (GBD) study is uniquely poised to provide these crucial data.

Objective: To describe cancer burden for 29 cancer groups in 195 countries from 1990 through 2017 to provide data needed for cancer control planning.

Evidence Review: We used the GBD study estimation methods to describe cancer incidence, mortality, years lived with disability, years of life lost, and disability-adjusted life-years (DALYs). Results are presented at the national level as well as by Socio-demographic Index (SDI), a composite indicator of income, educational attainment, and total fertility rate. We also analyzed the influence of the epidemiological vs the demographic transition on cancer incidence.

Findings: In 2017, there were 24.5 million incident cancer cases worldwide (16.8 million without nonmelanoma skin cancer [NMSC]) and 9.6 million cancer deaths. The majority of cancer DALYs came from years of life lost (97%), and only 3% came from years lived with disability. The odds of developing cancer were the lowest in the low SDI quintile (1 in 7) and the highest in the high SDI quintile (1 in 2) for both sexes. In 2017, the most common incident cancers in men were NMSC (4.3 million incident cases); tracheal, bronchus, and lung (TBL) cancer (1.5 million incident cases); and prostate cancer (1.3 million incident cases). The most common causes of cancer deaths and DALYs for men were TBL cancer (1.3 million deaths and 28.4 million DALYs), liver cancer (572 000 deaths and 15.2 million DALYs), and stomach cancer (542 000 deaths and 12.2 million DALYs). For women in 2017, the most common incident cancers were NMSC (3.3 million incident cases), breast cancer (1.9 million incident cases), and colorectal cancer (819 000 incident cases). The leading causes of cancer deaths and DALYs for women were breast cancer (601 000 deaths and 17.4 million DALYs), TBL cancer (596 000 deaths and 12.6 million DALYs), and colorectal cancer (414 000 deaths and 8.3 million DALYs).

Conclusions And Relevance: The national epidemiological profiles of cancer burden in the GBD study show large heterogeneities, which are a reflection of different exposures to risk factors, economic settings, lifestyles, and access to care and screening. The GBD study can be used by policy makers and other stakeholders to develop and improve national and local cancer control in order to achieve the global targets and improve equity in cancer care.
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http://dx.doi.org/10.1001/jamaoncol.2019.2996DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6777271PMC
December 2019

Effects of doping zinc oxide nanoparticles with transition metals (Ag, Cu, Mn) on photocatalytic degradation of Direct Blue 15 dye under UV and visible light irradiation.

J Environ Health Sci Eng 2019 Jun 1;17(1):479-492. Epub 2019 Apr 1.

5Department of Water and Health, Faculty of Life Sciences, Jagadguru Sri Shivarathreeshwara University, Sri Shivarathreeshwara Nagara, Mysuru, Karnataka 570015 India.

Background: Azo dyes represent the most commonly used group of dyes in the textile industry. These organic dyes are mainly resistant to biodegradation and may exhibit toxic and carcinogenic properties. The purpose of this study was to investigate the effects of doping zinc oxide (ZnO) nanoparticles (NPs) with transition metals (silver, manganese, and copper) on the photocatalytic efficiency of ZnO NPs in the removal of Direct Blue 15 dye from aqueous environments under ultraviolet (UV) radiation and visible light irradiation.

Methods: One or two metals were used for doping the NPs. In total, seven types of undoped and transition metal-doped NPs were synthesized using the thermal solvent method with ZnO precursors and transition metal salts. The characteristics of the synthesized NPs were determined based on the scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, dynamic light scattering (DLS), atomic force microscopy (AFM), and zeta potential measurements.

Results: The produced ZnO NPs did not exhibit any particular photocatalytic activities under UV radiation and visible light irradiation. The highest removal efficiency under UV radiation was about 74% in the presence of silver-doped ZnO NPs, while the maximum efficiency under visible light was 70% in the presence of copper-doped ZnO NPs. The lowest removal efficiency was related to pure ZnO, which was 18.4% and 14.6% under UV and visible light irradiation, respectively. Although the efficiency of dye removal under visible light was not high compared to UV radiation, this efficiency was noteworthy in terms of both practical and economic aspects since it was achieved without the presence of ultraviolet radiation.

Conclusions: The synthesis of transition metal-doped ZnO nanophotocatalysts (with one or two metals) under UV radiation or visible light irradiation could be used as an efficient and promising technology for the photocatalytic removal of Direct Blue 15 dye from aqueous environments.
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http://dx.doi.org/10.1007/s40201-019-00366-xDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582272PMC
June 2019

Arsenate removal from aqueous solutions using micellar-enhanced ultrafiltration.

J Environ Health Sci Eng 2019 Jun 19;17(1):115-127. Epub 2019 Feb 19.

4Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar.

In this study, arsenate (As-V) removal using micellar enhanced ultrafiltration (MEUF) modified by cationic surfactants was studied by a dead-end polyacrylonitrile (PAN) membrane apparatus. The UF membrane has been produced by a phase inversion process. The prepared membrane was characterized and analyzed for morphology and membrane properties. The influence of operating parameters such as initial concentrations of As-V, surfactants, pH, membrane thickness, and co-existing anions on the removal of As-V, surfactant rejection, and permeate flux have been studied. The experimental results show that from the two different cationic surfactants used the CPC (cetyl-pyridinium chloride) efficiency (91.7%) was higher than that of HTAB (hexadecyltrimethyl-ammonium bromide) (83.7%). The highest As-V removal was 100%, and was achieved using initial feed concentrations of 100-1000 μg/L at pH 7 with a membrane thickness of 150 μm in a dead-end filtration system. This efficiency for As-V removal was similar to that obtained using a cross-flow system. Nevertheless, this flux reduction was less than the reduction achieved in the dead-end filtration process. The PAN fabricated membrane in comparison to the RO and NF processes selectively removed the arsenic and the anions, in the water taken from the well, and had no substantial effect on the cations.
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http://dx.doi.org/10.1007/s40201-018-00332-zDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6582139PMC
June 2019

Application of modified electrospun nanofiber membranes with α-FeO nanoparticles in arsenate removal from aqueous media.

Environ Sci Pollut Res Int 2019 Jul 29;26(21):21993-22009. Epub 2019 May 29.

Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar.

In the present study, electrospun nanofiber membranes (ENMs) of polyacrylonitrile (PAN) were modified by dispersing α-FeO nanoparticles, synthesized using a thermal solvent process, in a PAN solution. The morphology and physiochemical properties of the prepared ENMs and the α-FeO were characterized using FESEM, EDX, BET, XRD, FTIR, porosity, and contact angle measurement. XPS was used to investigate the interaction of ENM with arsenate (As(V)) during the adsorption. Moreover, the effect of pH, the equilibrium isotherm, and the kinetics were investigated in batch experiments. The Langmuir isotherm best correlated the experimental results, indicating monolayer adsorption on ENMs, and the kinetics was best fitted, R > 0.99, by the pseudo-second-order model. In addition, the effects of certain conditions on the filtration performance were examined, such as feed concentration and transmembrane pressure (TMP). By passing sodium hydroxide (0.1 M) for 20 min, the membrane was regenerated. The increase in TMP, along with the presence of co-ions including chloride, nitrate, and sulfate, had negative impacts on the removal of As(V). The results show that the modified ENMs with α-FeO nanoparticles are applicable for As(V) ion removal and possibly for eliminating other heavy metals from aqueous media.
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http://dx.doi.org/10.1007/s11356-019-05228-5DOI Listing
July 2019

Pectin/Chitosan/Tripolyphosphate Nanoparticles: Efficient Carriers for Reducing Soil Sorption, Cytotoxicity, and Mutagenicity of Paraquat and Enhancing Its Herbicide Activity.

J Agric Food Chem 2019 May 9;67(20):5736-5745. Epub 2019 May 9.

Environmental Health Research Center, Research Institute for Health Development , Kurdistan University of Medical Sciences , Sanandaj , Iran.

As a potent herbicide capable of contaminating water and soil environments, paraquat, which is still widely used worldwide, is toxic to mammals, algae, aquatic animals, etc. Paraquat was loaded on novel nanoparticles composed of pectin, chitosan, and sodium tripolyphosphate (PEC/CS/TPP). The size, polydispersity index, and ζ potential of nanoparticles were characterized. Further assessments were carried out by SEM, AFM, FT-IR, and DSC. The encapsulation was highly efficient, and there was a delayed release pattern of paraquat. The encapsulated herbicide was less toxic to alveolar and mouth cell lines. Moreover, the mutagenicity of the formulation was significantly lower than those of pure or commercial forms of paraquat in a Salmonella typhimurium strain model. The soil sorption of paraquat and the deep soil penetration of the nanoparticle-associated herbicide were also decreased. The herbicidal activity of paraquat for maize or mustard was not only preserved but also enhanced after encapsulation. It was concluded that paraquat encapsulation with PEC/CS/TPP nanoparticles is highly efficient and the formulation has significant herbicide activity. It is less toxic to human environment and cells, as was evidenced by less soil sorption, cytotoxicity, and mutagenicity. Hence, paraquat-loaded PEC/CS/TPP nanoparticles have potential advantages for future use in agriculture.
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http://dx.doi.org/10.1021/acs.jafc.9b01106DOI Listing
May 2019

Application of cadmium-doped ZnO for the solar photocatalytic degradation of phenol.

Water Sci Technol 2019 Jan;79(2):375-385

Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Korea.

In this study, photocatalysis of phenol was studied using Cd-ZnO nanorods, which were synthesized by a hydrothermal method. The Cd-ZnO photocatalyst was characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy, and Fourier transform infrared (FT-IR) and UV-Vis spectroscopy. XRD patterns exhibit diffraction peaks indexed to the hexagonal wurtzite structures with the P63mc space group. SEM images showed that the average size of the Cd-ZnO nanorods was about 90 nm. Moreover, the nanorods were not agglomerated and were well-dispersed in the aqueous medium. FT-IR analysis confirmed that a surface modifier (n-butylamine) did not add any functional groups onto the Cd-ZnO nanorods. The dopant used in this study showed reduction of the bandgap energy between valence and conduction of the photocatalyst. In addition, effect of various operational parameters including type of photocatalyst, pH, initial concentration of phenol, amount of photocatalyst, and irradiation time on the photocatalytic degradation of phenol has been investigated. The highest phenol removal was achieved using 1% Cd-ZnO for 20 mg/l phenol at pH 7, 3 g/l photocatalyst, 120 min contact time, and 0.01 mole HO.
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http://dx.doi.org/10.2166/wst.2019.061DOI Listing
January 2019

Fabrication of a glycation induced amyloid nanofibril and polyalizarin yellow R nanobiocomposite: Application for electrocatalytic determination of hydrogen peroxide.

Int J Biol Macromol 2019 Feb 15;123:1297-1304. Epub 2018 Oct 15.

Vice chancellor for Food and Drug, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Amyloid fibrils were produced in a solution of bovine serum albumin (BSA) in buffer solution in the presence of fructose. The solution was incubated for 20 weeks in the dark. We used glycation induced bovine serum albumin in which fibrilogenesis (nano fibrils) followed by using fluorescence (Thioflavin T), Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM) to achieve the size and morphology of fibrils. A novel electrochemical biosensor for the detection of hydrogen peroxide was developed based on immobilizing poly (alizarin yellow R) and amyloid nano-fibrils on glassy carbon electrode (PAYR/AMLNFibs/GCE). The electrocatalytic response of the biosensor was proportional to the hydrogen peroxide concentration in the range of 1 μM to 2.2 mM with a limit of detection and sensitivity of 290 nM and 0.024 μA/μM, respectively. The modified electrode demonstrated many advantages such as high sensitivity, low detection of limit and excellent catalytic activity.
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http://dx.doi.org/10.1016/j.ijbiomac.2018.10.043DOI Listing
February 2019

Data on physicochemical quality of drinking water in the rural area in Divandarreh county, Kurdistan, Iran.

Data Brief 2018 Aug 22;19:1661-1669. Epub 2018 Jun 22.

Department of Environmental Health Engineering, Faculty of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran.

Good quality of drinking water is very important in the maintenance of human health. The gathered data from the present work was used to evaluate the quality of drinking water resources in the rural villages of Divandarreh, Iran. Physicochemical quality of water was determined by a collection of 35 random samples during dry and rainy seasons in 2015. The APHA approach was used to determine the physicochemical parameters of the samples. The results showed that the average concentration of Ca, Mg, Na, K, Cl, SO, TDS and TH during dry season was 85.64 mg/l, 13.41 mg/l, 34.11 mg/l, 2.8 mg/l, 9.9 mg/l, 45.7 mg/l, 326.06 mg/l and 269.61 mg/l, respectively. Also, the average concentration of the parameters during rainy season was 77.3 mg/l, 18.27 mg/l, 30.3 mg/l, 1.9 mg/l, 12.54 mg/l, 39 mg/l, 269.1 mg/l and 316.17 mg/l, respectively.
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http://dx.doi.org/10.1016/j.dib.2018.06.058DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6141269PMC
August 2018

Concentration, Source, and Potential Human Health Risk of Heavy Metals in the Commonly Consumed Medicinal Plants.

Biol Trace Elem Res 2019 Jan 26;187(1):41-50. Epub 2018 Apr 26.

Environmental Health Research Center, Research Institute for Health Development, Kurdistan University of Medical Sciences, Sanandaj, Iran.

A trend toward the use of traditional and herbal medicines has developed nowadays, and there is a growing concern regarding them being polluted with heavy metals. This study measured the heavy metal concentrations in eight different types of medicinal herbs and eight different types of herbal distillates sold in the markets in Sanandaj, Kurdistan, Iran. The concentration of some metals (Cd, Cu, Mn, Fe, Zn, Al, Co, Ni, Cr, Pb, and Mg) was quantified by inductively coupled plasma mass spectrometry, and the associated health risk for adults and children was estimated. The mean concentration of all the metals was within the permissible limits set by the WHO. The medicinal herbs contained significantly more Al, As, Cd, Cr, Fe, Mn, Ni, Pb, and Zn (p < 0.02) than the herbal distillates. However, the concentrations of Cu and Hg were higher in the herbal distillates. The non-carcinogenic risks of consumption of traditional medicines in adults and children were assessed based on the target hazard quotients (THQs). The THQs for individual metals (except Al and Cr) from individual herbs were less than 1, which is considered as safe for human consumption.
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http://dx.doi.org/10.1007/s12011-018-1357-3DOI Listing
January 2019

Environmental interventions based on the Health Belief Model and the Ecological-social model in the continuation of consumption of rice, free from toxic metals.

Electron Physician 2018 Jan 25;10(1):6153-6163. Epub 2018 Jan 25.

Psychosocial Injuries Research Center, Biostatistics department, Ilam University of Medical Sciences, Ilam, Iran.

Background And Aim: Continuation of healthy nutritional behaviors is one of the important factors in effectiveness of educational intervention programs. The aim of this research is to compare the Health Belief Model and the Ecological-social model in reducing consumption of rice contaminated with toxic metals after completion of environmental intervention and continuation of consumption of healthy rice.

Methods: This research was the implementation of a six-month randomized controlled trial interventional program in two groups' interventions along with a control group, with 80 people for each group totally, amounting to 240 women, between 18 and 50 years of age in Ilam, Iran in 2014. The questionnaires of the three groups consisted of demographic information, knowledge, the constructs of the models, performance of rice consumption. Friedman test and repeated measures used for data analysis with SPSS (version 20), and confidence interval of 95% were considered.

Results: The results of the Friedman test indicated a significant increase in the number of women consuming healthy rice over six months after intervention in both intervention groups (p<0.001). Women in the ECO group consumed healthy rice 27.5% more than the HBM group (p<0.001). The results of repeated measures analysis of variance suggested greater improvement in the consumption of healthy rice in the ECO group in comparison with the HBM group over six months after intervention (p<0.05).

Conclusions: Both educational environmental intervention methods caused the altered diet of people regarding consumption of healthy rice over six months after the intervention. Increased social support also probably had a more effective role in continuation of healthy diet among the people.
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http://dx.doi.org/10.19082/6153DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5853988PMC
January 2018

The effect of educational intervention based on an Ecological-social model on consuming fruit and vegetables in women in Ilam.

Electron Physician 2017 Dec 25;9(12):5954-5959. Epub 2017 Dec 25.

Psychosocial Injuries Research Center, Biostatistics department, Ilam University of Medical Sciences, Ilam, Iran.

Background: The effect of instructional models on the changing behavior of consuming fruit and vegetables in the prevention of diseases caused by consumption of foods including rice, contaminated with toxic metals, has not been investigated in Iran yet.

Objective: To compare an Ecological-social model (ECO) group and Control group in increasing fruit and vegetable consumption.

Methods: This research involved implementation of a six-month randomized controlled educational interventionist program into a group of Ecological-social framework along with a control group, totally summing up to 160 women between 18 and 50 years of age in Ilam, Iran in 2014. The questionnaire included knowledge, social support construct (immediate family, relatives, friends, colleagues and neighbors.) and fruit and vegetable intake in both groups before and after the intervention was examined. Data were analyzed by SPSS version 16 using the signed ranks test, and repeated measures analysis of variance analysis, and confidence interval of 95% were employed.

Results: The results of the signed ranks test showed a significant increase in social support in the intervention group (p<0.001). This test showed a significant increase in fruit and vegetable consumption and a significant increase in the number of women using healthy rice (p<0.001), and a significant reduction in the number of women consuming unhealthy rice in the intervention group (p<0.001), that determines dietary intake improvement after the intervention compared with before the intervention (p<0.01). However, this improvement was not observed in the control group.

Conclusions: The results showed that ECO plays an effective role in improving fruit and vegetable consumption in women. Therefore, this model was implemented as a health protocol through health-care centers to conduct the prevention of complications resulting from the use of food contaminated with toxic metals.
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http://dx.doi.org/10.19082/5954DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5843421PMC
December 2017

Isolation and identification of the native population bacteria for bioremediation of high levels of arsenic from water resources.

J Environ Manage 2018 Apr 22;212:39-45. Epub 2018 Feb 22.

Department of Environmental Health Engineering, Faculty of Health, Water Purification Research Center, Tehran Medical Sciences Branch Islamic Azad University, Tehran, Iran.

Health of millions of people is threatened by the risk of drinking arsenic-contaminated water worldwide. Arsenic naturally conflicts with the concept of life, but recent studies showed that some microorganisms use toxic minerals as the source of energy. Hence, the researchers should consider the development of cost-effective and highly productive procedures to remove arsenic. The current study was conducted on a native bacterial population of Seyed-Jalaleddin Spring Kurdistan, Iran. Accordingly, the arsenic amount in water samples was measured >500 μg/L by the two field and in vitro methods. Water samples were transferred to laboratory and cultured on chemically defined medium (CDM) with arsenic salts. A total of 14 native arsenic-resistant bacterial strains were isolated and after providing pure culture and performing biochemical tests, the isolates were identified using polymerase chain reaction (PCR) and 16s rRNA genomic sequencing. The potential of bacterial strains for the biotransformation of arsenic was assessed by the qualitative assessment of AgNO method and efficiency of arsenic speciation was determined for the first time by silver diethyldithiocarbamate (SDDC) method with an error of less than 5%. Among the isolated strains, only strain As-11 and strain As-12 showed arsenic transformation characteristics and were registered in NCBI database by the access numbers KY119262 and KY119261, respectively. Results of the current study indicated that strain As-11 had the potential of biotransformation of As(V) to As(III) and vice versa with the efficiency of 78% and 48%, respectively. On the other hand, strain As-12 had the potential for biotransformation of As(V) to As(III) and vice versa with the efficiency of 28% and 45%, respectively.
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http://dx.doi.org/10.1016/j.jenvman.2018.01.075DOI Listing
April 2018

Effect of Environmental Intervention on the Consumption of Rice without Toxic Metals Based on the Health Belief Model and Ecological-Social Model.

J Clin Diagn Res 2017 Jul 1;11(7):JC01-JC06. Epub 2017 Jul 1.

Social Determinants of Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Introduction: The effect of instructional models on the changing behaviour of consuming contaminated rice with toxic metals has not been investigated in Iran yet.

Aim: To compare effect of Health Belief Model (HBM) and Ecological (ECO) social model on decreasing the consumption of rice contaminated with toxic metals.

Materials And Methods: The study aimed at implementing a six-month interventionist program among three groups (HBM, ECO and Control). The study population comprised of 240 women, aged 18 to 50. Questionnaires were distributed which consisted of demographic information, knowledge, constructs of the models, performance of rice consumption, and the manner of rice cooking. In HBM group participants were individually provided with instructions based on HBM. However, in ECO group participants received the instruction through social networks consisted of mothers, sisters, family members, and colleagues.

Results: The results of Wilcoxon test indicated improvements in people's diet including a significant increase in the number of women consuming rice without toxic metals, a significant reduction in the number of women consuming rice contaminated with toxic metals in both intervention groups. On the other hand, such an improvement was not observed in the control group. The results of repeated measures' analysis of variance suggested further improvement in healthy diet in ECO group rather than HBM group after the completion of the environmental intervention.

Conclusion: Both methods of instructional intervention caused changes in the diet of people regarding the consumption of rice free from toxic metals and changes in the manner of cooking from Kateh (steaming rice) to Pilaw (draining rice). Development of social support had probably a more effective role on the improvement of people's diet.
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http://dx.doi.org/10.7860/JCDR/2017/26784.10262DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5583945PMC
July 2017

Prevalence of Intestinal Protozoa Infections and Associated Risk Factors among Schoolchildren in Sanandaj City, Iran.

Iran J Parasitol 2017 Jan-Mar;12(1):108-116

Kurdistan Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Background: Intestinal parasites are still a serious public health problem in the world, especially in developing countries. This study aimed to assess the prevalence of intestinal protozoa infections and associated risk factors among schoolchildren in Sanandaj City, Iran.

Methods: This cross-sectional study involving 400 schoolchildren was carried out in 2015. Each student was selected using systematic random sampling method. Questionnaire and observation were used to identify possible risk factors. Fresh stool samples were observed using formal-ether concentration method.

Results: Five species of intestinal protozoa were identified with an overall prevalence of 42.3%. No cases of helminthes infection were detected. The predominant protozoa were (21.3%) and (4.5%). Overall, 143 (35.9%) had single infections and 26 (6.4%) were infected with more than one intestinal protozoa, in which 23 (5.9%) had double intestinal protozoa infections and 3 (0.5%) had triple infections. A significant relationship was observed between intestinal protozoa infection with economic status, water resources for drinking uses, and the methods of washing vegetables (<0.05).

Conclusion: Education programs on students and their families should be implemented for the prevention and control of protozoa infections in the study area.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5522686PMC
August 2017

High-flux ultrafiltration membrane based on electrospun polyacrylonitrile nanofibrous scaffolds for arsenate removal from aqueous solutions.

J Colloid Interface Sci 2017 Nov 24;506:564-571. Epub 2017 Jul 24.

Department of Applied Chemistry, University of Johannesburg, Johannesburg, South Africa. Electronic address:

Arsenic contamination in drinking water is a serious problem worldwide. In this study, to remove arsenate from contaminated water, a new thin-film composite (TFC) membrane was fabricated and tested. This membrane was composed of an electrospun nanofibrous scaffold, a polyethylene terephthalate (PET) substrate as support, and a polyacrylonitrile (PAN) coating layer. To effectively reject arsenate ions, cetylpyridinium chloride (CPC) pretreatment was used. For evaluating the performance of TFC membrane, its flux and contaminant rejection were compared to a conventional ultrafiltration (UF) membrane. Due to high porosity, the TFC membrane showed a flux, which was 172-520% higher than the UF membrane. In addition, The TFC membrane was 1.1-1.3 times more efficient in rejecting arsenate ions than the UF membrane.
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http://dx.doi.org/10.1016/j.jcis.2017.07.086DOI Listing
November 2017

Effect of TiO/GAC and water vapor on chloroform decomposition in a hybrid plasma-catalytic system.

Environ Technol 2018 Aug 18;39(16):2041-2050. Epub 2017 Jul 18.

a Environmental Health Research Center , Kurdistan University of Medical Sciences , Sanandaj , Iran.

This paper presents the combination of TiO/GAC catalyst and NTP for the decomposition of chloroform using a DBD reactor. The experiments were performed using an AC transformer as the power supply system to determine the optimal conditions of the chloroform conversion in the presence of a hydrogen-rich substance, that is, water vapor. TiO/GAC enhanced the removal efficiency and also CO selectivity significantly, leading to an acceptable conversion rate at SIEs higher than 400 J L. The adsorption property of GAC was noticed to be an effective factor for catalytic activity by increasing the residence time, although the higher retention time prevented the accurate determination of chlorine and carbon balance. Selectivity toward HCl was improved considerably from 24.3% to 64.3% over catalyst when water was fed as a hydrogen-rich compound. At the same time, the harmful chlorinated by-products such as TCBA and TCE declined significantly. A noticeable enhancement in the selectivity toward CO was observed when both catalyst and water were introduced, regardless of the inlet concentration. Our findings suggest that the hybrid of NTP with TiO/GAC will highly be effective in the abatement of chloroform, and the addition of HO will successfully decline harmful chlorinated by-products.
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http://dx.doi.org/10.1080/09593330.2017.1349185DOI Listing
August 2018

Evaluation of trace element concentration in cancerous and non-cancerous tissues of human stomach.

Chemosphere 2017 Oct 17;184:747-752. Epub 2017 Jun 17.

Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran; Department of Environmental Health Engineering, Faculty of Health, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Gastric cancer has a high mortality rate in west of Iran. Various environmental elements are proposed as cancer risk factors including trace elements. Trace elements can induce initiation or progression of carcinogenesis via oxidative stress and DNA injury. The aim of this study was to measure and compare some trace element concentration (Ca, Cu, Fe, As, Mg, Ni, Cd and Cr) in gastric cancer tissues and normal tissues. For this purpose, 35 patients with gastric cancer and 30 without any cancer were biopsied. Biopsies were taken from cancerous tissue and non-cancerous tissue of gastric cancer patients and gastric tissue of normal patients. The analysis of trace elements was performed using Inductively coupled plasma mass spectrometry (ICP-MS). Data analysis was carried out using SPSS and STATA 12 software. The research found that the concentrations of Fe, Mg, and As were higher in cancerous tissues compared with non-cancerous tissues whereas Cr, Cu, Ca, and Ni concentrations were higher in non-cancerous tissues of cancerous patients. When comparisons were made for cancer and normal samples, copper was the only metal, which was significantly higher in cancerous samples (p < 0.05) and Cr mean concentration in normal tissues was significantly higher compared with cancerous tissues (P = 0.02). Chi-Square test showed that there was no significant relationship in the demographic information between cancerous and normal patients except for location with K = 7.604. Increased Cu and As concentration in gastric patients (both tissues) propose that these elements may have carcinogenic effects, although further study is suggested.
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http://dx.doi.org/10.1016/j.chemosphere.2017.06.071DOI Listing
October 2017

Electrocatalytic activity of manganese oxide nanosphere immobilized onto deoxyribonucleic acid modified electrode: Application to determine environmental pollutant thiourea at natural pH.

J Colloid Interface Sci 2017 Oct 7;504:579-585. Epub 2017 Jun 7.

Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran. Electronic address:

Based on immobilizing manganese oxide nanospheres (MnOxNsph)/deoxyribonucleic (DNA) on glassy carbon electrode (MnOxNsph/DNA/GCE), a new electrochemical biosensor for the detection of thiourea (TU) was fabricated. In order to prepare DNA template, cyclic voltammetry (CV) method was used. Scanning electron microscopy (SEM) was used for characterization of MnOx/DNA. Electrochemical impedance spectroscopy was utilized to confirm the successful stepwise assembly procedure of the biosensor. The electrocatalytical behaviors of the biosensor were also investigated by cyclic voltammetry and differential pulse voltammetry (DPV). The results showed that MnOxNsph/DNA exhibited a remarkable electrocatalytic activity for the oxidation of TU under optimal conditions. The linear range, detection of limit and sensitivity were calculated for oxidation peaks (OX1 and OX2). This electrode demonstrated many advantages such as high sensitivity, low detection of limit, excellent catalytic activity at natural pH values, remarkable antifouling property toward TU and its oxidation product for the two oxidation peaks.
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http://dx.doi.org/10.1016/j.jcis.2017.06.016DOI Listing
October 2017

Decontamination of arsenic(V)-contained liquid phase utilizing FeO/bone char nanocomposite encapsulated in chitosan biopolymer.

Environ Sci Pollut Res Int 2017 Jun 13;24(17):15157-15166. Epub 2017 May 13.

Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.

The application of a novel nanocomposite synthesized through the combination of FeO nanoparticles and bone char particles for the adsorption of As(V) ions in the aquatic medium was investigated. As-prepared nanocomposite was immobilized by using chitosan biopolymer. The characterization of the nanocomposite was performed via SEM, XRD, FT-IR, and BET together with the determination of zero-point charge of the adsorbent surface. As results, the obtained experimental data were fitted well with pseudo-first-order kinetic model (R = 0.997) and Langmuir isotherm model (R = 0.990) with the maximum adsorption capacity of about 112 μg/g. Increasing the dosage of nanocomposite and initial solute concentration led to increasing the adsorption capacity of As(V) ions, while decreasing the solution temperature resulted in the enhanced adsorption process. According to the results of thermodynamic study, the adsorption of As(V) ions onto the nanocomposite was spontaneous and exothermic in nature.
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http://dx.doi.org/10.1007/s11356-017-9128-9DOI Listing
June 2017

Super high removal capacities of heavy metals (Pb and Cu) using CNT dendrimer.

J Hazard Mater 2017 Aug 18;336:146-157. Epub 2017 Apr 18.

Division of Sustainability, College of Science and Engineering, Hamad Bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar. Electronic address:

This research demonstrates the capability of carbon nanotubes (CNT) modified with four generations of poly-amidoamine dendrimer (PAMAM, G4) to remove Cu and Pb heavy metals from aqueous solution in single and binary component systems. Uniquely high adsorption capacities for copper and lead, which are 3333 and 4870mg/g respectively, were achieved. FTIR, H NMR, Zeta potential, SEM and TEM techniques were employed for characterizing the synthetic nanocomposite and indicated that the dendrimer functionalized CNTs have been synthesized. The effects of several parameters including initial metal ion concentration, solution pH and the nanocomposite dosage were studied. The experimental data were analyzed by the Langmuir and Freundlich isotherms and the pseudo-first order and pseudo-second order kinetics models. The maximum adsorption occurred at pH=7. The adsorption process for Cu and Pb in single and binary component systems fit the Langmuir and extended Langmuir models respectively. This study also tested the kinetic sorption of the metals on PAMAM/CNT in single and binary component metal systems at various metal ions concentrations. The results showed that PAMAM/CNT nanocomposite was a super-adsorbent, able to uptake uniquely large quantities of heavy metal from single and binary component liquid phase.
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http://dx.doi.org/10.1016/j.jhazmat.2017.02.059DOI Listing
August 2017

Density assessment and mapping of microorganisms around a biocomposting plant in Sanandaj, Iran.

Environ Monit Assess 2017 May 25;189(5):233. Epub 2017 Apr 25.

Center of Excellence for Occupational Health, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.

Exposure to microorganisms can cause various diseases or exacerbate the excitatory responses, inflammation, dry cough and shortness of breath, reduced lung function, chronic obstructive pulmonary disease, and allergic response or allergic immune. The aim of the present study was to investigate the density of microorganisms around the air of processing facilities of a biocomposting plant. Each experiment was carried out according to ASTM E884-82 (2001) method. The samples were collected from inhaled air in four locations of the plant, which had a high traffic of workers and employees, including screen, conveyor belt, aerated compost pile, and static compost pile. The sampling was repeated five times for each location selected. The wind speed and its direction were measured using an anemometer. Temperature and humidity were also recorded at the time of sampling. The multistage impactor used for sampling was equipped with a solidified medium (agar) and a pump (with a flow rate of 28.3 l/m) for passing air through the media. It was found that the mean density of total bacteria was >1.7 × 10 cfu/m in the study area. Moreover, the mean densities of fungi, intestinal bacteria (Klebsiella), and Staphylococcus aureus were 5.9 × 10, 3.3 × 10, and 4.1 × 10 cfu/m, respectively. In conclusion, according to the findings, the density of bacteria and fungi per cubic meter of air in the samples collected around the processing facilities of the biocomposting plant in Sanandaj City was higher than the microbial standard for inhaled air.
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http://dx.doi.org/10.1007/s10661-017-5914-6DOI Listing
May 2017

Isolation and identification of indigenous prokaryotic bacteria from arsenic-contaminated water resources and their impact on arsenic transformation.

Ecotoxicol Environ Saf 2017 Jun 8;140:170-176. Epub 2017 Mar 8.

Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.

Arsenic is a known human carcinogen. Arsenite [As(III), HAsO] and arsenate [As(V), HAsO and HAsO] are the two predominant compounds of As found in surface water and groundwater. The aim of this study was to explore a bioremediation strategy for biotransformation of arsenite to arsenate by microorganisms. In this study, Babagorgor Spring, located west of Iran, was selected as the arsenic-contaminated source and its physicochemical characteristics and in situ microbiological composition were analyzed. Inductively Coupled Plasma-Atomic Emission Spectrometry (ICP-AES) analysis indicated that the arsenic level was 614μg/l. Fourteen arsenic tolerant indigenous bacteria were isolated from arsenic-contaminated water using chemically defined medium (CDM), supplemented with 260-3900mg/l arsenite and 1560-21800mg/l arsenate. Among the isolates, a strain As-11 exhibited high ability of arsenic transformation. Biochemical tests were used for bacterial identification and confirmation was conducted by 16S rRNA sequence analysis. Results confirmed that As-11 was related to the genus Pseudomonas. This bacterium showed maximum tolerable concentration to arsenite up to 3250mg/l and arsenate up to 20280mg/l. Under heterotrophic conditions, the bacterium exhibited 48% of As(III) and 78% of As(V) transformation from the medium amended with 130 and 312mg/l of sodium arsenite and sodium arsenate, respectively. Moreover, under chemolithotrophic conditions, bacterium was able to transform 41% of 130mg/l of As(III) from the medium amended with nitrate as the terminal electron acceptor. Pseudomonas strain As-11 was reported as an arsenic transformer, for the first time.
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http://dx.doi.org/10.1016/j.ecoenv.2017.02.051DOI Listing
June 2017