35,179 results match your criteria Arsenic

Study of the micromorphology and health risks of arsenic in copper smelting slag tailings for safe resource utilization.

Ecotoxicol Environ Saf 2021 May 12;219:112321. Epub 2021 May 12.

School of Resources and Environmental Engineering, Anhui Province Engineering Laboratory for Mine Ecological Remediation, Anhui University, Hefei 230601, PR China. Electronic address:

Slag tailings are produced by "cooling-grinding-ball milling-flotation" and other processes of slag, while slag is produced by the flash smelting of the original ore. The utilization and environmental hazards of arsenic in slag tailings have become a focus of attention. This study on slag tailings reveals the presence of arsenic in copper smelting tailings from the mineralogy and leaching perspectives, and the noncarcinogenic and carcinogenic risks of arsenic to the human body were assessed by using the USEPA health risk model. Read More

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Associations between private well water and community water supply arsenic concentrations in the conterminous United States.

Sci Total Environ 2021 May 6;787:147555. Epub 2021 May 6.

Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, USA.

Geogenic arsenic contamination typically occurs in groundwater as opposed to surface water supplies. Groundwater is a major source for many community water systems (CWSs) in the United States (US). Although the US Environmental Protection Agency sets the maximum contaminant level (MCL enforceable since 2006: 10 μg/L) for arsenic in CWSs, private wells are not federally regulated. Read More

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Root responses to localised soil arsenic enrichment in the fern Pityrogramma calomelanos var. austroamericana grown in rhizoboxes.

Plant Physiol Biochem 2021 Apr 28;164:147-159. Epub 2021 Apr 28.

Centre for Mined Land Rehabilitation, Sustainable Minerals Institute, The University of Queensland, Brisbane, QLD, 4072, Australia.

The terrestrial fern Pityrogramma calomelanos, a cosmopolitan tropical species, is one of the strongest known arsenic (As) hyperaccumulator plants. This study aimed to determine whether P. calomelanos preferentially forages for arsenite (As) or arsenate (As) in As-contaminated soils, and whether a positive root response to As enhances accumulation in P. Read More

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The relationship between chronic arsenic exposure and body measures among US adults: National Health and Nutrition Examination Survey 2009-2016.

J Trace Elem Med Biol 2021 May 12;67:126771. Epub 2021 May 12.

Virginia Commonwealth University School of Medicine, Division of Hospital Medicine, Department of Internal Medicine, Richmond, VA, 23298, United States; Eastern Virginia Medical School, Department of Internal Medicine, Norfolk, VA, 23507, United States.

Background: Current research on the relationship between arsenic and body measures is inconclusive. We explored the relationship between arsenic and body measures in a large cohort representative of the United States population.

Methods: Data were analyzed from the 2009-2016 National Health and Nutrition Examination Survey (NHANES). Read More

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Elemental plasma content and urinary excretion in vineyard farmers occupationally exposed to pesticides in southern Brazil.

Environ Sci Pollut Res Int 2021 May 15. Epub 2021 May 15.

Postgraduate Program in Biosciences and Physiopathology, State University of Maringá, Maringá, Paraná, Brazil.

This is a cross-sectional study with data and biological material collection from vineyard farmers in southern Brazil. An interview was carried out through a questionnaire developed according to the reference guide of the state government. Plasma and urine samples were screened for Aluminum, Chromium, Manganese, Copper, Nickel, Cobalt, Zinc, Arsenic, Selenium, Cadmium, Antimony, Barium, Mercury, Lead and Uranium, with a technique for fast determination of these elemental contents in biological material utilizing dynamic reaction cell inductively coupled mass spectrometry. Read More

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Speciation analysis of organoarsenic species in marine samples: method optimization using fractional factorial design and method validation.

Anal Bioanal Chem 2021 May 15. Epub 2021 May 15.

Institute of Marine Research, P.O. Box 1870, 5817, Bergen, Norway.

Organoarsenic species in marine matrices have been studied for many years but knowledge gaps still exist. Most literature focuses on monitoring of arsenic (As) species using previously published methods based on anion- and cation-exchange high-performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS). These studies are often limited to few As species and/or only specific method performance characteristics are described. Read More

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Umbilical Cord Blood Metal Mixtures and Birth Size in Bangladeshi Children.

Environ Health Perspect 2021 May 14;129(5):57006. Epub 2021 May 14.

Environmental and Occupational Medicine and Epidemiology Program, Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.

Background: Studies have evaluated environmental exposure to toxic metals such as arsenic (As), cadmium (Cd), manganese (Mn), or lead (Pb) on birth size; however, information on potential effects of exposures to metal mixtures is limited.

Objectives: We assessed the association between metal mixtures (As, Cd, Mn, Pb) in umbilical cord blood and neonate size in Bangladeshi children.

Methods: In this birth cohort study, pregnant women who were of age with an ultrasound-confirmed singleton pregnancy of gestation were recruited from two Bangladesh clinics between 2008 and 2011. Read More

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Versatile Coordination of Ag(I) and Cu(I) Ions Towards Cyclo-As5 Ligands.

Chemistry 2021 May 14. Epub 2021 May 14.

University of Regensburg, Inorganic Chemistry, Universitätsstrasse 31, D-93040, Regensburg, GERMANY.

The reactions of the cyclo-As 5 complex [Cp*Fe(η 5 -As 5 )] ( B ) with the Ag(I) and Cu(I) salts of the weakly coordinating anion (WCA) [FAl{OC 6 F 10 (C 6 F 5 )} 3 ] ‾ ([FAl] ‾ ) are studied. These reactions allow the synthesis of the mononuclear complexes [M(η 5 :η 2 - B ) 2 ][FAl] ( M = Ag ( 1 ), Cu ( 2 )) when a ratio of B :M(FAl) = 2:1 is used. Compound 1 shows an unusual disorder of the central Ag(I) cation between two π-coordinating cyclo-As 5 ligands which is absent in 2 pointing to a weak interaction of the Ag center towards the cyclo-As 5 ligands in B . Read More

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Arsenic compounds: The wide application and mechanisms applied in acute promyelocytic leukemia and carcinogenic toxicology.

Eur J Med Chem 2021 May 4;221:113519. Epub 2021 May 4.

School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, 100029, China. Electronic address:

Arsenic (As), as well as its various compounds have been widely used for nearly 4000 years either as drugs or poisons. These compounds are valuable in the treatment of various diseases ranging from dermatosis to cancer, thereby emphasizing their important roles as therapeutic agents. The ability of As compounds, especially arsenic trioxide (ATO) in the treatment of acute promyelocytic leukemia (APL), has fundamentally altered people's understanding of the poison, and has become a major factor in the re-emergence of Western medicine candidates to treat leukemia and other solid tumors. Read More

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Arsenic bioaccumulation in the soil fauna alters its gut microbiome and microbial arsenic biotransformation capacity.

J Hazard Mater 2021 May 5;417:126018. Epub 2021 May 5.

State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address:

The biotransformation of arsenic mediated by microorganisms plays an important role in the arsenic biogeochemical cycle. However, the fate and biotransformation of arsenic in different soil fauna gut microbiota are largely unknown. Herein the effects of arsenic contamination on five types of soil fauna were compared by examining variations in arsenic bioaccumulation, gut microbiota, and arsenic biotransformation genes (ABGs). Read More

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Silicate fertilization improves microbial functional potentials for stress tolerance in arsenic-enriched rice cropping systems.

J Hazard Mater 2021 May 10;417:125953. Epub 2021 May 10.

Institute of Agriculture and Life Sciences, Gyeongsang National University, Jinju 660-701, South Korea; Division of Applied Life Science, Gyeongsang National University, Jinju 660-701, South Korea. Electronic address:

The host plant and its rhizosphere microbiome are similarly exposed to abiotic stresses under arsenic (As)-enriched cropping systems. Since silicon (Si) fertilization is effective in alleviating As-induced stresses in plants, and plant-microbe interactions are tightly coupled, we hypothesized that Si-fertilization would improve soil microbial functional potentials to environmental stress tolerance, which was not yet studied. With the help of high throughput metagenome, microarray and analyzing plant impacts on soil microbiome and the environment, we tested the hypothesis in two geographically different rice (i. Read More

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Adsorption of arsenic (III) from aqueous solution by a novel phosphorus-modified biochar obtained from Taraxacum mongolicum Hand-Mazz: Adsorption behavior and mechanistic analysis.

J Environ Manage 2021 May 10;292:112764. Epub 2021 May 10.

Guangdong Provincial Key Laboratory for Radionuclides Pollution Control and Resources, School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; School of Civil Engineering, Guangzhou University, Guangzhou, 510006, PR China. Electronic address:

A novel phosphorus (P) modified biochar (PLBC) was produced by pyrolyzing biomass of the dietic herb Taraxacum mongolicum Hand-Mazz (TMHM) and treating it with monopotassium phosphate (KHPO). This phosphorous loaded biochar was then assessed as adsorbent for As(III) removal from contaminated water. In the current research, the adsorbent was characterized before and after P loading by means of SEM-EDX, TEM, FTIR and XRD techniques. Read More

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Arsenic co-carcinogenesis: inhibition of DNA repair and interaction with zinc finger proteins.

Semin Cancer Biol 2021 May 10. Epub 2021 May 10.

Department of Pharmaceutical Sciences, University of New Mexico Health Sciences Center, Albuquerque, NM, 87131, USA. Electronic address:

Arsenic is widely present in the environment and is associated with various population health risks including cancers. Arsenic exposure at environmentally relevant levels enhances the mutagenic effect of other carcinogens such as ultraviolet radiation. Investigation on the molecular mechanisms could inform the prevention and intervention strategies of arsenic carcinogenesis and co-carcinogenesis. Read More

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Arsenic trioxide-loaded CalliSpheres: study of drug release and antitumor activity, and study of pharmacokinetics, treatment efficacy and safety in liver cancer.

Oncol Rep 2021 Jul 13;46(1). Epub 2021 May 13.

Department of Interventional Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China.

The aim of the present study was to investigate the arsenic trioxide (ATO) loading/releasing efficiency of CalliSphere beads (CBs), as well as the anticancer activity, pharmacokinetics, treatment efficacy and safety of ATO-eluting CBs in liver cancer. The ATO loading and releasing efficiencies in CBs were evaluated. Furthermore, cell viability, invasion, apoptosis, VEGF expression and MMP9 expression were determined in liver cancer cells treated with ATO-eluting CBs or ATO solution. Read More

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Trace element-based geochemical contamination characteristics and potential risks to human health: a case study from Northeast Turkey.

Environ Geochem Health 2021 May 13. Epub 2021 May 13.

Çekmece Nuclear Research and Training Center, Yarımburgaz Mah, 34303, Halkalı İstanbul, Turkey.

Trace elements measured in Artvin province soil samples in Northeast Turkey were assessed using pollution and health indices. The study area is positioned in one of the essential metallogenic belts in Turkey. This attempt is the first endeavor toward the study area in this context. Read More

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Danshen () on the Global Market: What Are the Implications for Products' Quality?

Front Pharmacol 2021 26;12:621169. Epub 2021 Apr 26.

Pharmacognosy and Phytotherapy, UCL School of Pharmacy, London, United Kingdom.

Danshen (Radix et rhizoma ; Bunge, Lamiaceae) is commonly used in Asia, including China, Japan, and Korea with markets in America and Europe growing substantially. It is included in multiple pharmacopeias and salvianolic acid B and tanshinone IIA are used as quality markers. However, on the markets, substitutes and different processing methods often are a concern. Read More

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The first application of compositional data analysis (CoDA) in a multivariate perspective for detection of pollution source in sea sediments: The Pozzuoli Bay (Italy) case study.

Chemosphere 2021 Jul 11;274:129955. Epub 2021 Feb 11.

Department of Earth, Environmental and Resources Sciences, University of Naples Federico II, 80126, Naples, Italy.

In the last decades, investigating geochemistry of sea sediments has been challenging in the eastern sector of Pozzuoli Bay, source of the metal(loid)s has been a matter of debate and the proposed origin of potentially toxic elements (PTEs) has been occasionally inconsistent. In this study, compositional data analysis (CoDA) was used because the results are independent of the measurement unit, the selected subgroup of elements and the order of chemicals in the dataset. The robust variant of principal component analysis (PCA) indicated that Hg, Cd, Cu, Pb and Zn were positively correlated with mud and organic matter in the sediments deposited in front of the former industrial site. Read More

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Metal-Fungus interaction: Review on cellular processes underlying heavy metal detoxification and synthesis of metal nanoparticles.

Chemosphere 2021 Jul 15;274:129976. Epub 2021 Feb 15.

Academy of Scientific and Innovative Research, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India; Environment & Sustainability Department, CSIR-Institute of Minerals and Materials Technology, Bhubaneswar, 751013, India. Electronic address:

The most adverse outcome of increasing industrialization is contamination of the ecosystem with heavy metals. Toxic heavy metals possess a deleterious effect on all forms of biota; however, they affect the microbial system directly. These heavy metals form complexes with the microbial system by forming covalent and ionic bonds and affecting them at the cellular level and biochemical and molecular levels, ultimately leading to mutation affecting the microbial population. Read More

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Bivalve haemocyte adhesion, aggregation and phagocytosis: a tool to reckon arsenic induced threats to freshwater ecosystem.

Fish Shellfish Immunol 2021 May 9. Epub 2021 May 9.

Department of Zoology, Aquatic Toxicology Laboratory, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, PIN 700019, West Bengal, India. Electronic address:

The freshwater aquifers of the Indo-Gangetic plains support rich biodiversity which is under the threat of arsenic contamination. The filter feeding bivalve mollusc Lamellidens marginalis is a sessile and sentinel resident of these freshwater habitats. In the present study, the classical cell behaviours of adhesion and aggregation were monitored in the circulating haemocytes of the freshwater bivalve under the exposure of sodium arsenite (NaAsO) at sublethal concentrations in controlled laboratory conditions for a maximum time-span of sixteen days. Read More

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Total Arsenic Concentrations in Sea Turtle Tissues from the Mediterranean Coast of Spain.

Bull Environ Contam Toxicol 2021 May 12. Epub 2021 May 12.

Fisheries and Aquaculture Service (CARM), 30100, Murcia, Spain.

In this work we studied total arsenic concentrations in liver, muscle and kidney of 49 individuals of two sea turtle species (loggerhead sea turtles, n = 45; leatherback turtles, n = 4) stranded in Murcia (South-eastern Spain) coastline between 2009 and 2018. In accordance with the literature, muscle was the tissue with the highest concentrations in both species, followed by liver and kidney. Although differences in arsenic concentrations were not statistically significant between the study species, loggerhead sea turtles showed concentrations two or three times higher than those of leatherback turtles, which we attribute to differences on feeding behavior and habitat preferences. Read More

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Reactivity of mono- and divalent aluminium compounds towards group 15 nanoparticles.

Chem Commun (Camb) 2021 May 12. Epub 2021 May 12.

Institute of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 15, Karlsruhe D-76131, Germany.

Herein, we present a novel approach towards organometallic group 13/15-compounds, i.e. the reaction of nanoparticular arsenic and antimony with low-valent aluminium species. Read More

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Adipotropic effects of heavy metals and their potential role in obesity.

Fac Rev 2021 26;10:32. Epub 2021 Mar 26.

IM Sechenov First Moscow State Medical University (Sechenov University), Moscow, Russia.

Epidemiological studies demonstrated an association between heavy metal exposure and the incidence of obesity and metabolic syndrome. However, the particular effects of metal toxicity on adipose tissue functioning are unclear. Therefore, recent findings of direct influence of heavy metals (mercury, cadmium, and lead) and metalloid (arsenic) on adipose tissue physiology are discussed while considering existing gaps and contradictions. Read More

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Associations between blood heavy metal(loid)s and serum heme oxygenase-1 in pregnant women: Do their distribution patterns matter?

Environ Pollut 2021 Apr 29;286:117249. Epub 2021 Apr 29.

Institute of Reproductive and Child Health, Peking University/ Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Beijing, 100191, PR China; Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, 100191, PR China.

The relationship between heavy metal(loid)s exposure and oxidative stress damage is a matter of research interest. Our study aimed to investigate the distribution patterns of the nine heavy metal(loid)s in blood of pregnant women, including four toxic heavy metal(loid)s [arsenic (As), cadmium (Cd), lead (Pb) and mercury (Hg)] and five typical heavy metal(loid)s [manganese (Mn), cobalt (Co), copper (Cu), zinc (Zn), and selenium (Se)] in blood. Blood samples of 348 women were collected and their concentrations in the serum (sr) and blood cells (bc) were measured, as well as serum heme oxygenase-1 (HO-1) (an oxidative stress marker). Read More

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Mass balance of nine trace elements in two karst catchments in southwest China.

Sci Total Environ 2021 May 4;786:147504. Epub 2021 May 4.

State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; CAS Centre for Excellence in Quaternary Science and Global Change, Xi'an 710061, China. Electronic address:

High geological background levels of trace elements (TEs) and high population density in the karst areas of southwest China have imposed environmental pressure on the fragile ecosystems in this region. Understanding the mass budget of TEs, especially the toxic ones, is of great importance to sustain future developments. This study investigates the mass balance and fate of nine TEs (cadmium, arsenic, lead, chromium, copper, nickel, zinc, thallium, and antimony) in two karst catchments (Huilong and Chenqi) in southwest China through estimation of their mass budgets in throughfall, open field precipitation, total suspended particulate matter (TSP), litterfall, fertilization, harvested crops, surface runoff, and underground runoff. Read More

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Arsenate and arsenite-induced inhibition and recovery in two diazotrophic cyanobacteria Nostoc muscorum and Anabaena sp.: study on time-dependent toxicity regulation.

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

Ranjan Plant Physiology and Biochemistry Laboratory, Department of Botany, University of Allahabad, Prayagraj, 211002, India.

Exposure time, metal bio-accumulation, and upregulation of ascorbate-glutathione (AsA-GSH) cycle are the key factor that provide tolerance against heavy metal stress. Thus, the current study is an endeavor to prove our hypothesis that regulation of arsenate (As: 50, 100, and 150 mM) and arsenite (As: 50, 100, and 150 μM) toxicity is time dependent (48-96 h) due to modulation in bio-accumulation pattern, AsA-GSH cycle, and non-enzymatic antioxidants in two paddy field cyanobacteria Nostoc muscorum ATCC27893 and Anabaena sp. PCC7120. Read More

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First Report of Paramyrothecium breviseta Causing Leaf Spot Disease of Coffea canephora in China.

Plant Dis 2021 May 11. Epub 2021 May 11.

Hai Kou , China;

Coffee is a tropical plant with two widely cultivated species, namely Coffea arabica and Coffea canephora. A leaf spot disease causing brownish and necrotic lesions was broken out on the C. canephora coffee seedlings in a nursery in Ruili County, Yunnan Province, China, during 2018 to 2019. Read More

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Arsenate toxicity to the marine microalga Chlorella vulgaris increases under phosphorus-limited condition.

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

State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, People's Republic of China.

To understand the arsenic (As) toxicity to aquatic organisms in the phosphors-polluted aquatic ecosystem, the growth, the physiological response of Chlorella vulgaris exposed to As (V), and the underlying mechanism were investigated under different phosphorus (P) levels (0, 6, 13, 32 μM). Results showed that As toxicity to the marine microalga C. vulgaris was enhanced under P-limited condition. Read More

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Real-time contamination zoning in water distribution networks for contamination emergencies: a case study.

Environ Monit Assess 2021 May 11;193(6):336. Epub 2021 May 11.

Department of Civil Engineering, East Tehran Branch, Islamic Azad University, Tehran, Iran.

Contamination of urban water distribution systems (WDS) is a critical issue due to the number of victims that might be impacted in a short period of time. Any effective rapid emergency response plan for reducing the number of sick people or deaths among those drinking the polluted water requires a reliable forecast of the water contamination zoning map (CZM). The water CZM is a visual representation of the spread of contamination at the time of contamination detection. Read More

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The effects of the exposure to neurotoxic elements on Italian schoolchildren behavior.

Sci Rep 2021 May 10;11(1):9898. Epub 2021 May 10.

Department of Occupational Health, University of Brescia, Piazzale Spedali Civili, 1, 25123, Brescia, BS, Italy.

Neurodevelopmental disorders are constantly increasing on a global scale. Some elements like heavy metals are known to be neurotoxic. In this cross-sectional study we assessed the neurobehavioral effect of the exposure to trace elements including lead, mercury, cadmium, manganese, arsenic and selenium and their interactions among 299 schoolchildren residing in the heavily polluted Taranto area in Italy. Read More

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