325,541 results match your criteria environmental pollutants

Effects of ferrous iron supplementation on reductive dechlorination of tetrachloroethene and on methanogenic microbial community.

FEMS Microbiol Ecol 2021 May 12. Epub 2021 May 12.

Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1, Higashi, Tsukuba, Ibaraki 305-8567, Japan.

Chloroethenes are common soil and groundwater pollutants. Their dechlorination is impacted by environmental factors, such as the presence of metal ions. We here investigated the effect of ferrous iron on bacterial reductive dechlorination of chloroethenes and on methanogen community. Read More

View Article and Full-Text PDF

Air quality in cabin environment of different passenger cars: effect of car usage, fuel type and ventilation/infiltration conditions.

Environ Sci Pollut Res Int 2021 May 12. Epub 2021 May 12.

Department of Mechanical Engineering, Environmental Technology Laboratory, University of Western Macedonia, Sialvera & Bakola Street, 50100, Kozani, Greece.

Despite that commuters spend only 5.5% of their time in cabin vehicles, their exposure to harmful air pollutants, originated from the vehicle itself, and traffic emission is considered significant. In this study, two passenger cars with different type of fuels were investigated in terms of air quality and thermal comfort of their cabin. Read More

View Article and Full-Text PDF

Biodegradation of chlorpyrifos by a Weissella confusa strain and evaluation of some probiotic traits.

Arch Microbiol 2021 May 12. Epub 2021 May 12.

Laboratory of Molecular Toxicology, Faculty of Nature and Life Sciences, University Mohamed Seddik Benyahia of Jijel, Jijel, Algeria.

Pesticides play an important role in agriculture; however, their excessive use causes several problems such as pollution of ecosystems and risks to human health. The presence of microorganisms able to degrade these pollutants can reduce their negative effect. The objective of this study was to test the capacity of Weissella confusa Lb. Read More

View Article and Full-Text PDF

Impact of treated sewage on meiobenthic nematodes: a case study from the Tunisian Refining Industries Company.

Braz J Biol 2021 10;82:e246116. Epub 2021 May 10.

Laboratory of Biomonitoring of the Environment LR01 ES14, University of Carthage, Faculty of Sciences of Bizerte, Zarzouna 7021, Tunisia.

The main objective of the current study was to assess the impact of the water taken from the 'Tunisian Refining Industries Company' on meiobenthic nematodes, before and after a series of treatments in decantation basins followed by its discharge in Bizerte bay, Tunisia. The comparison of environmental parameters of the two types of water was clearly indicative of an improvement in the quality of treated waters after a significant reduction in their loads in hydrocarbons. Overall, the water retained a good quality after being treated by 'Tunisian Refining Industries Company' before discharge in the sea. Read More

View Article and Full-Text PDF

The influence of active carbon contaminants on the ozonation mechanism interpretation.

Sci Rep 2021 May 11;11(1):9934. Epub 2021 May 11.

Department of Analytical and Environmental Chemistry, Faculty of Chemistry, Adam Mickiewicz University Poznan, Uniwersytetu Poznańskiego 8, 61-614, Poznań, Poland.

In water treatment technology, activated carbons are used primarily as sorbents to remove organic impurities, mainly natural organic matter, but also as catalysts in the ozonation process. Commercially available activated carbons are usually contaminated with mineral substances, classified into two main groups: alkali metals (Ca, Na, K, Li, Mg) and multivalent metals (Al, Fe, Ti, Si). The presence of impurities on the carbon surface significantly affects the pH values determined for raw and ozonated carbon as well as their acidity and alkalinity. Read More

View Article and Full-Text PDF

Development of a new method for isolation of urban air particulates deposited in the human lung tissue.

Chemosphere 2021 Apr 27;280:130585. Epub 2021 Apr 27.

Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran; Center for Air Pollution Research (CAPR), Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran; Department of Research Methodology and Data Analysis, Institute for Environmental Research (IER), Tehran University of Medical Sciences, Tehran, Iran. Electronic address:

Particulate matters (PMs) are important pollutants in urban air pollution because of their variable composition. The pulmonary clearance of PMs is critical to prevent long-term immunological responses. This study established a new method for the isolation of probably deposited urban air particulates from the human lung tissue, to investigate the features of uncleared particulates. Read More

View Article and Full-Text PDF

Effects of driving behavior on real-world emissions of particulate matter, gaseous pollutants and particle-bound PAHs for diesel trucks.

Environ Pollut 2021 May 3;286:117292. Epub 2021 May 3.

Department of Environmental Engineering and Management, Chaoyang University of Technology, Taiwan. Electronic address:

This study employed a portable emissions measurement system to investigate the effects of vehicle attributes, driving behavior, and road grade on real-world emissions of particulate matter (PM), regulated gaseous pollutants, and particle-bound polycyclic aromatic hydrocarbons (PAHs) for old-model diesel trucks (model year 1995-2006, 6.7-35.0 metric ton) with little to no tailpipe emission control. Read More

View Article and Full-Text PDF

Trade-offs between short-term mortality attributable to NO and O changes during the COVID-19 lockdown across major Spanish cities.

Environ Pollut 2021 May 4;286:117220. Epub 2021 May 4.

Climate and Health Program, Barcelona Institute for Global Health, Barcelona, Spain.

The emergence of the COVID-19 pandemic forced most countries to put in place lockdown measures to slow down the transmission of the virus. These lockdowns have led to temporal improvements in air quality. Here, we evaluate the changes in NO and O levels along with the associated impact upon premature mortality during the COVID-19 lockdown and deconfinement periods along the first epidemic wave across the provincial capital cities of Spain. Read More

View Article and Full-Text PDF

Analysis of the spatial effect of outward foreign direct investment on air pollution: evidence from China.

Anhua Zhou Jun Li

Environ Sci Pollut Res Int 2021 May 11. Epub 2021 May 11.

Business School, Hunan Normal University, Changsha, 410081, China.

Outward foreign direct investment (OFDI) plays a pivotal role in the strategy to build a high-level and open economy. This research used spatial panel models and data from 30 provinces in China from 2004 to 2017 to empirically analyse the relationship between OFDI and air pollution. The results revealed that, first, China's air pollution showed two spatial clustering areas: the eastern coastal area (e. Read More

View Article and Full-Text PDF

Tunable Multiplexed Whole-Cell Biosensors as Environmental Diagnostics for ppb-Level Detection of Aromatic Pollutants.

ACS Sens 2021 May 11. Epub 2021 May 11.

Department of Chemistry, Indian Institute of Technology Bombay Powai, Mumbai 400076, India.

Aromatics such as phenols, benzene, and toluene are carcinogenic xenobiotics which are known to pollute water resources. By employing synthetic biology approaches combined with a structure-guided design, we created a tunable array of whole-cell biosensors (WCBs). The MopR genetic system that has the natural ability to sense and degrade phenol was adapted to detect phenol down to ∼1 ppb, making this sensor capable of directly detecting phenol in permissible limits in drinking water. Read More

View Article and Full-Text PDF

Interdisciplinary Approaches to COVID-19.

Adv Exp Med Biol 2021 ;1318:923-936

Universal Scientific Education and Research Network (USERN), The World, Tehran, Iran.

The coronavirus disease 2019 (COVID-19) pandemic has been a significant concern worldwide. The pandemic has demonstrated that public health issues are not merely a health concern but also affect society as a whole. In this chapter, we address the importance of bringing together the world's scientists to find appropriate solutions for controlling and managing the COVID-19 pandemic. Read More

View Article and Full-Text PDF

Application of interval-valued Pythagorean fuzzy VIKOR approach for petroleum sludge treatment technology evaluation and selection.

Environ Sci Pollut Res Int 2021 May 10. Epub 2021 May 10.

School of Management Engineering, Shandong Jianzhu University, Jinan, 250000, China.

Petroleum sludge is produced during oilfield development and production and can negatively impact the production area and surrounding environment. With increasing attention to the environmental protection of oilfields, finding an energy-efficient, environmentally sound, cost-effective and socially acceptable sludge treatment method is crucial to the sustainable development of oil companies. However, there are several problems in the selection process: ① there is no effective index system for the evaluation of treatment technologies; ② there is data uncertainty and loss of information; ③ experts in the field often make one-sided decisions; and ④ the common decision models fail to balance the general effect and local dominance of a treatment technology. Read More

View Article and Full-Text PDF

Morphological characteristics and ecological risk assessment of nitrogen and phosphorus in the sediments of Futunxi watershed in Fujian province.

Environ Monit Assess 2021 May 10;193(6):335. Epub 2021 May 10.

School of Geography Science, Nanjing Normal University, Nanjing, 210023, Jiangsu, China.

The total amount and morphology of nitrogen and phosphorus in sediments have important environmental significance. The study of the ecological risk assessment of nitrogen and phosphorus in sediments is important to understand the environmental quality of water body in the basin. In this study, taking the Futunxi Basin of Fujian Province as an example, the single factor index and bioavailability coefficient method were used to evaluate the ecological risk of nitrogen and phosphorus in the sediments, and reveal the spatial change and environmental significance of the nitrogen and phosphorus forms. Read More

View Article and Full-Text PDF

Risk of groundwater contamination widely underestimated because of fast flow into aquifers.

Proc Natl Acad Sci U S A 2021 May;118(20)

Department of Civil Engineering, University of Bristol, BS8 1TR, Bristol, United Kingdom.

Groundwater pollution threatens human and ecosystem health in many regions around the globe. Fast flow to the groundwater through focused recharge is known to transmit short-lived pollutants into carbonate aquifers, endangering the quality of groundwaters where one quarter of the world's population lives. However, the large-scale impact of such focused recharge on groundwater quality remains poorly understood. Read More

View Article and Full-Text PDF

Quantifying the high resolution seasonal emission of air pollutants from crop residue burning in India.

Environ Pollut 2021 Apr 24;286:117165. Epub 2021 Apr 24.

Department of Earth and Atmospheric Sciences, National Institute of Technology Rourkela, India.

Biomass burning, a recurring global phenomenon is also considered an environmental menace, making headlines every year in India with onset of autumn months. Agriculture is demographically the broadest economic sector and plays a significant role in the overall socio-economic fabric of India. Hence, disposal of crop residue is done mainly by burning leading to deterioration of air quality. Read More

View Article and Full-Text PDF

Effect of microplastics on aquatic biota: A hormetic perspective.

Environ Pollut 2021 Apr 30;285:117206. Epub 2021 Apr 30.

CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS); Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, 264003, PR China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, PR China; Center for Ocean Mega-Science, Chinese Academy of Sciences (CAS), Qingdao, 266071, PR China. Electronic address:

As emerging pollutants, microplastics (MPs) have been found globally in various freshwater and marine matrices. This study recompiled 270 endpoints of 3765 individuals from 43 publications, reporting the onset of enhanced biological performance and reduced oxidative stress biomarkers induced by MPs in aquatic organisms at environmentally relevant concentrations (≤1 mg/L, median = 0.1 mg/L). Read More

View Article and Full-Text PDF

Quantum parameter analysis of the adsorption mechanism by freshly formed ferric hydroxide for synthetic dye and antibiotic wastewaters.

Chemosphere 2021 Apr 16;280:130577. Epub 2021 Apr 16.

School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, China; Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, PR China. Electronic address:

In this study, the adsorption effect by freshly formed ferric hydroxide (FFFH) for the removal of 47 synthetic dye and antibiotic wastewaters under different pH conditions (i.e., pH = 4, 7, and 10) was investigated. Read More

View Article and Full-Text PDF

Shift in skin microbiota and immune functions of zebrafish after combined exposure to perfluorobutanesulfonate and probiotic Lactobacillus rhamnosus.

Ecotoxicol Environ Saf 2021 May 7;218:112310. Epub 2021 May 7.

State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China. Electronic address:

Dysbiosis of fish skin microbiome and immunity by environmental pollutants are rarely studied in toxicological research in spite of their importance for fish health. In the present study, adult zebrafish were exposed to 0 and 10 μg/L of perfluorobutanesulfonate (PFBS) for 40 days, with or without the supplementation of probiotic Lactobacillus rhamnosus, with objectives to explore the interaction between PFBS pollutant and probiotic bacteria on skin mucosal microbiota and immune response. Amplicon sequencing analysis found that PFBS alone significantly disturbed the microbial community composition and abundance on the skin, favoring the growth of stress-tolerant bacteria (e. Read More

View Article and Full-Text PDF

Mechanisms of the synergistic lung tumorigenic effect of arsenic and benzo(a)pyrene combined- exposure.

Zhishan Wang

Semin Cancer Biol 2021 May 7. Epub 2021 May 7.

Division of Cancer Biology, Department of Medicine, MetroHealth Medical Center, Case Western Reserve University School of Medicine, Cleveland, OH, 44109, USA. Electronic address:

Humans are often exposed to mixtures of environmental pollutants especially environmental chemical carcinogens, representing a significant environmental health issue. However, our understanding on the carcinogenic effects and mechanisms of environmental carcinogen mixture exposures is limited and mostly relies on the findings from studying individual chemical carcinogens. Both arsenic and benzo(a)pyrene (BaP) are among the most common environmental carcinogens causing lung cancer and other types of cancer in humans. Read More

View Article and Full-Text PDF

How mobility restrictions policy and atmospheric conditions impacted air quality in the State of São Paulo during the COVID-19 outbreak.

Environ Res 2021 May 7:111255. Epub 2021 May 7.

Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Av. Pres. Antônio Carlos, 6627, 31270-901, Belo Horizonte, Brazil; Post Graduation Program on Environmental Engineering - Federal University of Espírito Santo, Av. Fernando Ferrari, 514, 29075-910, Vitória, Brazil. Electronic address:

Mobility restrictions are among actions to prevent the spread of the COVID-19 pandemic and have been pointed as reasons for improving air quality, especially in large cities. However, it is crucial to assess the impact of atmospheric conditions on air quality and air pollutant dispersion in the face of the potential variability of all sources. In this study, the impact of mobility restrictions on the air quality was analyzed for the most populous Brazilian State, São Paulo, severely impacted by COVID-19. Read More

View Article and Full-Text PDF

Role of Innate Immune System in Environmental Lung Diseases.

Curr Allergy Asthma Rep 2021 May 10;21(5):34. Epub 2021 May 10.

Department of Medicine, Duke University, Durham, NC, USA.

The lung mucosa functions as a principal barrier between the body and inhaled environmental irritants and pathogens. Precise and targeted surveillance mechanisms are required at this lung-environment interface to maintain homeostasis and preserve gas exchange. This is performed by the innate immune system, a germline-encoded system that regulates initial responses to foreign irritants and pathogens. Read More

View Article and Full-Text PDF

[Effect of Gaseous Pollutant Concentration on the Number of Daily Outpatient Visits for Acne in Lanzhou].

Zhongguo Yi Xue Ke Xue Yuan Xue Bao 2021 Apr;43(2):180-187

Information Center,Lanzhou University Second Hospital,Lanzhou 730000,China.

Objective To determine the relationship between air pollutants [SO,NO,8 hours average concentration of ozone(O8h)] and outpatient visits for acne in Lanzhou,China. Methods Data of daily outpatient visits for acne and concentrations of air pollutants(SO,NO,and O8h)from January 2013 to December 2017 were collected.With the control of long-term trend and day-of-week effect,a distributed lag nonlinear model was used to analyze the lag and cumulative effects of air pollutants on the outpatient visits. Read More

View Article and Full-Text PDF

Numerical evaluation of the performances of the ventilation system in a blast furnace casthouse.

Environ Sci Pollut Res Int 2021 May 9. Epub 2021 May 9.

State Key Laboratory of Iron and Steel Industry Environmental Protection, Beijing, China.

The blast furnace casthouse is a typical heavy-polluting factory building of a steel enterprise. During the tapping process and the taphole opening, the dust concentration in the factory building's workroom can reach tens of thousands mg/m. Over time, the air pollutants in the workplace can have unwanted consequences on employees' health. Read More

View Article and Full-Text PDF

Changes in short-lived climate pollutants during the COVID-19 pandemic in Tehran, Iran.

Environ Monit Assess 2021 May 8;193(6):331. Epub 2021 May 8.

School of Environment, College of Engineering, University of Tehran, P.O. Box, 14155-6135, Tehran, Iran.

This study investigates the changes of short-lived climate pollutants and other air pollutants during the COVID-19 pandemic in Tehran, Iran. Concentrations of air pollutants were obtained from 21 monitoring stations for the period from 5 January 2019 to 5 August 2019, representing normal conditions unaffected by COVID-19, and the period 5 January 2020 to 5 August 2020, i.e. Read More

View Article and Full-Text PDF

Mapping the distribution of perfluoroalkyl substances in zebrafishes by liquid extraction surface analysis mass spectrometry.

Talanta 2021 Aug 6;231:122377. Epub 2021 Apr 6.

State Key Laboratory of Biocontrol, South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, School of Life Sciences, Sun Yat-Sen University, 135 Xingangxi Road, Guangzhou, 510275, China; Institute of Environmental and Ecological Engineering, Guangdong University of Technology, 100 Waihuanxi Road, Guangzhou, 510006, China. Electronic address:

Investigation on the distribution of persistent organic pollutants (POPs) in aquatic organisms is of great importance for exploring the biological toxicity and health risks of environmental pollutants. In this study, a liquid extraction surface analysis mass spectrometry (LESA-MS) method was developed for rapid and in situ analysis of the spatial distribution of perfluoroalkyl substances (PFASs) in zebrafish. By combining the high-precision automated moving platform of LESA device and the high-resolution MS, quantitative analysis of perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) in zebrafish tissue section were easily achieved. Read More

View Article and Full-Text PDF

Green additive to upgrade biochar from spent coffee grounds by torrefaction for pollution mitigation.

Environ Pollut 2021 Apr 28;285:117244. Epub 2021 Apr 28.

School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, Nibong Tebal, 14300, Pulau Pinang, Malaysia.

A green approach using hydrogen peroxide (HO) to intensify the fuel properties of spent coffee grounds (SCGs) through torrefaction is developed in this study to minimize environmental pollution. Meanwhile, a neural network (NN) is used to minimize bulk density at different combinations of operating conditions to show the accurate and reliable model of NN (R = 0.9994). Read More

View Article and Full-Text PDF

The application of steel slag in a multistage pond constructed wetland to purify low-phosphorus polluted river water.

J Environ Manage 2021 May 7;292:112578. Epub 2021 May 7.

National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental Protection Scientific Observation and Research Station for Lake Dongtinghu(SEPSORSLD), State Environmental Protection Key Laboratory for Lake Pollution Control, State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, PR China; School of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China.

To investigate the effect of a constructed wetland (CW) with steel slag as the filler on water contaminated by low phosphorus levels, a multistage pond CW system was designed in this study. Low-phosphorus polluted river water was used as the research object. This study explored the effects of using steel slag as a CW filler on phosphorus removal and the total phosphorus (TP) purification effect of the wetland system. Read More

View Article and Full-Text PDF

Effective removal of refractory organic contaminants from reverse osmosis concentrated leachate using PFS-nZVI/PMS/O process.

Waste Manag 2021 May 6;128:55-63. Epub 2021 May 6.

Qingdao Xiaojianxi Leachate Treatment Co. Ltd., Qingdao, China; Qingdao Jieyuan Environment Co. Ltd., Qingdao, China.

Reverse osmosis concentrated leachate (ROCL) from landfill leachate treatment contains high amounts of refractory organics. In this study, a combination of polymerized ferric sulfate (PFS) and nanoscale zero-valent iron/peroxymonosulfate/ozone (nZVI/PMS/O) approach was adopted to remove refractory pollutants in ROCL. The effects of coagulant species, dosage and initial pH on the pre-treatment of organics from ROCL during coagulation process were investigated. Read More

View Article and Full-Text PDF

Impact of the exposome on the development and function of pancreatic β-cells.

David J Hill

Mol Aspects Med 2021 May 5:100965. Epub 2021 May 5.

Department of Physiology and Pharmacology, Western University, London, ON, Canada; Department of Medicine, Western University, London, ON, Canada; Lawson Health Research Institute, St Joseph Health Care, 268 Grosvenor St, London, ON, N6A 4V2, Canada. Electronic address:

The development and plasticity of the endocrine pancreas responds to both the intrauterine and postnatal exposome in a constant attempt to predict and respond to alterations in nutritional availability and metabolic requirements. Both under- and over-nutrition in utero, or exposure to adverse environmental pollutants or maternal behaviors, can each lead to altered β-cell or function at birth, and a subsequent mismatch in pancreatic hormonal demands and secretory capacity postnatally. This can be further exacerbated by metabolic stress postnatally such as from obesity or pregnancy, resulting in an increased risk of gestational diabetes, type 2 diabetes, and even type 1 diabetes. Read More

View Article and Full-Text PDF

Mixtures of chelating agents to enhance photo-Fenton process at natural pH: Influence of wastewater matrix on micropollutant removal and bacterial inactivation.

Sci Total Environ 2021 Apr 29;786:147416. Epub 2021 Apr 29.

Department of Chemical Engineering and Analytical Chemistry, Faculty of Chemistry, Universitat de Barcelona, C/Martí i Franqués 1, 08028 Barcelona, Spain.

Three organic fertilizers (EDTA (Ethylenedinitrilotetraacetic acid), EDDS (Ethylenediamine-N, N'-disuccinic acid) and DTPA (Diethylene triamine pentaacetic acid)) were tested as Fe-complexes in photo-Fenton process at natural pH for micropollutants (MPs) abatement and simultaneous E.coli inactivation. Less stable Fe-complexes show high iron precipitation, stopping MPs degradation. Read More

View Article and Full-Text PDF