37,453 results match your criteria Arsenic

Arsenic as hazardous pollutant: Perspectives on engineering remediation tools.

Sci Total Environ 2022 May 11:155870. Epub 2022 May 11.

Department of Botany, GDC Pulwama, 192301 Jammu and Kashmir, India. Electronic address:

Arsenic (As) is highly toxic metal (loid) that impairs plant growth and proves fatal towards human population. It disrupts physiological, biochemical and molecular attributes of plants associated with water/nutrient uptake, redox homeostasis, photosynthetic machineries, cell/membrane damage, and ATP synthesis. Numerous transcription factors are responsive towards As through regulating stress signaling, toxicity and resistance. Read More

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Dictyophora Polysaccharide Attenuates As-Mediated PINK1/Parkin Pathway-Induced Mitophagy in L-02 Cell through Scavenging ROS.

Molecules 2022 Apr 28;27(9). Epub 2022 Apr 28.

School of Public Health, Guizhou Medical University, Guiyang 550025, China.

Arsenic (As) is common in the human living environment and a certain amount of exposure to As can lead to liver damage; this toxic effect has been proved to be closely related to intracellular PINK1/Parkin pathway-mediated mitophagy. Dictyophora is an edible fungus that extracts polysaccharides with antioxidant and hepatoprotective effects. In the present study, we demonstrated that As induced the onset of mitophagy in hepatocytes by stimulating cellular production of ROS to activate PINK1/Parkin, and the extent of damage increased with increased As-induced toxicity. Read More

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Effects of Pyrolysis Temperature and Chemical Modification on the Adsorption of Cd and As(V) by Biochar Derived from .

Int J Environ Res Public Health 2022 Apr 25;19(9). Epub 2022 Apr 25.

Faculty of Science and Technology, Seikei University, Tokyo 1808633, Japan.

Phytoremediation can be applied successfully to solve the serious worldwide issue of arsenic (As) and cadmium (Cd) pollution. However, the treatment of biomass containing toxic elements after remediation is a challenge. In this study, we investigated the effective use of biomass resources by converting the As hyperaccumulator into biochar to adsorb toxic elements. Read More

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Mercury and Arsenic Discharge from Circumneutral Waters Associated with the Former Mining Area of Abbadia San Salvatore (Tuscany, Central Italy).

Int J Environ Res Public Health 2022 Apr 23;19(9). Epub 2022 Apr 23.

Department of Earth Sciences, University of Florence, Via G. La Pira 4, 50121 Florence, Italy.

Dissolved and suspended toxic elements in water discharged from abandoned and active mining areas pose several critical issues, since they represent a threat to the environment. In this work, we investigated the water, suspended particulates, and stream sediments of a 2.1 km long creek (Fosso della Chiusa) that is fed by waters draining the galleries of the abandoned Hg mining area of Abbadia San Salvatore (Mt. Read More

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The Effect of Agglomeration on Arsenic Adsorption Using Iron Oxide Nanoparticles.

Nanomaterials (Basel) 2022 May 9;12(9). Epub 2022 May 9.

Department of Chemistry, Hope College, Holland, MI 49423, USA.

The presence of arsenic in groundwater and other drinking water sources presents a notable public health concern. Although the utilization of iron oxide nanomaterials as arsenic adsorbents has shown promising results in batch experiments, few have succeeded in using nanomaterials in filter setups. In this study, the performance of nanomaterials, supported on sand, was first compared for arsenic adsorption by conducting continuous flow experiments. Read More

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Anodic Stripping Voltammetric Analysis of Trace Arsenic(III) on a Au-Stained Au Nanoparticles/Pyridine/Carboxylated Multiwalled Carbon Nanotubes/Glassy Carbon Electrode.

Nanomaterials (Basel) 2022 Apr 24;12(9). Epub 2022 Apr 24.

College of Science, Central South University of Forestry and Technology, Changsha 410004, China.

A Au-stained Au nanoparticle (Au)/pyridine (Py)/carboxylated multiwalled carbon nanotubes (C-MWCNTs)/glassy carbon electrode (GCE) was prepared for the sensitive analysis of As(III) by cast-coating of C-MWCNTs on a GCE, electroreduction of 4-cyanopyridine (cPy) to Py, adsorption of gold nanoparticles (AuNPs), and gold staining. The Py/C-MWCNTs/GCE can provide abundant active surface sites for the stable loading of AuNPs and then the AuNPs-initiated Au staining in HAuCl + NHOH solution, giving a large surface area of Au on the Au/Py/C-MWCNTs/GCE for the linear sweep anodic stripping voltammetry (LSASV) analysis of As(III). At a high potential-sweep rate of 5 V s, sharp two-step oxidation peaks of As(0) to As(III) and As(III) to As(V) were obtained to realize the sensitive dual-signal detection of As(III). Read More

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Assessment of Metal Intake by Selected Food Supplements Based on Beehive Products.

Foods 2022 Apr 28;11(9). Epub 2022 Apr 28.

Department of Environmental Health, Faculty of Medicine, University of Rijeka, 51000 Rijeka, Croatia.

The aim of this study was to determine the quantity of particular toxic metals (Pb, Cd, As, Hg) and micronutrients (Cr, Fe, Co, Ni, Cu, Zn, Se) in the recommended daily dose of 51 food supplements based on beehive products. Samples taken from the Croatian market were submitted for the identification/quantification of studied metals and micronutrients. It was carried out by means of inductively coupled plasma mass spectrometry (ICP-MS). Read More

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Preclinical In Vitro Model to Assess the Changes in Permeability and Cytotoxicity of Polarized Intestinal Epithelial Cells during Exposure Mimicking Oral or Intravenous Routes: An Example of Arsenite Exposure.

Int J Mol Sci 2022 Apr 27;23(9). Epub 2022 Apr 27.

Division of Microbiology, National Center for Toxicological Research, US-Food and Drug Administration, Jefferson, AR 72079, USA.

The gastrointestinal tract (GIT) is exposed to xenobiotics, including drugs, through both: local (oral) and systemic routes. Despite the advances in drug discovery and in vitro pre-clinical models, there is a lack of appropriate translational models to distinguish the impact of these routes of exposure. Changes in intestinal permeability has been observed in different gastrointestinal and systemic diseases. Read More

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Targeting Cell Death Mechanism Specifically in Triple Negative Breast Cancer Cell Lines.

Int J Mol Sci 2022 Apr 26;23(9). Epub 2022 Apr 26.

Research Center for Functional Genomics, Biomedicine and Translational Medicine, "Iuliu Hațieganu" University of Medicine and Pharmacy, 400337 Cluj-Napoca, Romania.

Triple negative breast cancer (TNBC) is currently associated with a lack of treatment options. Arsenic derivatives have shown antitumoral activity both in vitro and in vivo; however, their mode of action is not completely understood. In this work we evaluate the response to arsenate of the double positive MCF-7 breast cancer cell line as well as of two different TNBC cell lines, Hs578T and MDA-MB-231. Read More

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The response of metal mobilization and redistribution to reoxygenation in Baltic Sea anoxic sediments.

Sci Total Environ 2022 May 10:155809. Epub 2022 May 10.

Linnaeus University, Faculty of Health and Life Sciences, Department of Biology and Environmental Science, Sweden.

To bring life back to anoxic coastal and sea basins, reoxygenation of anoxic/hypoxic zones has been proposed. This research focuses on the metals released during the oxidization of sediments from two locations in the anoxic Eastern Gotland Basin under a laboratory-scale study. Triplicate experimental cores and reference cores were collected from the North and South Eastern Gotland Basins. Read More

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Tuning the structure of cerium-based metal-organic frameworks for efficient removal of arsenic species: The role of organic ligands.

Chemosphere 2022 May 10:134934. Epub 2022 May 10.

Shanghai Engineering Research Center of Biotransformation of Organic Solid Waste, School of Ecological and Environmental Sciences, East China Normal University, and Institute of Eco-Chongming, Shanghai, 200241, China. Electronic address:

The ability of organic ligands to change the structure of metal-organic frameworks (MOFs) in nature and influence their adsorption efficiency for arsenic species is enormous. The current work was designed to investigate the adsorption performance of cerium-based MOFs with tunable structures through the use of organic ligands (Ce-MOF-66 and Ce-MOF-808) towards arsenic species from water. The structural features of Ce-MOF-66 and Ce-MOF-808 with varying crystallinity, morphology, particle size, and surface area are considerably altered by organic ligands tuning, resulting in clearly distinct arsenate (As (V)) and arsenite (As (III)) adsorption capabilities. Read More

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Response of Phragmites australis to increasing As(V) concentrations: Accumulation and speciation of As, and plant oxidative stress.

Chemosphere 2022 May 10:134937. Epub 2022 May 10.

Department of Soil and Water Conservation and Organic Waste Management, CEBAS-CSIC, Spain. Electronic address:

The use of macrophytes has been proposed recently as a suitable option for the phytostabilization or rhizofiltration of soils or waters contaminated by trace elements. As one of the most representative species of this type of plant, common reed (Phragmites australis (Cav.) Trin. Read More

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Arsenite (III) removal via manganese-decoration on cellulose nanocrystal -grafted polyethyleneimine nanocomposite.

Chemosphere 2022 May 10:134925. Epub 2022 May 10.

Department of Materials Engineering, KU Leuven, Leuven, 3001, Belgium. Electronic address:

The manganese is successfully induced as a "bridge joint" to fabricate a new adsorbent (CNC-Mn-PEI) connecting cellulose nanocrystal (CNC) and polyethyleneimine (PEI) respectively. It was used to remove As (III) from waste water. It has been proved that the incompact CNC and PEI were successfully connected by Mn ions, which induced the formation of O-Mn-O bonds and the removal efficiency is maintained in the broad pH range of 4-8, even with the influence of NO and CO. Read More

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Arsenic species in mesopelagic organisms and their fate during aquafeed processing.

Chemosphere 2022 May 10:134906. Epub 2022 May 10.

Institute of Marine Research, P.O. Box 1870 Nordnes, NO-5817 Bergen, Norway. Electronic address:

A responsible harvest of mesopelagic species as aquafeed ingredients has the potential to address the United Nations Sustainable Development Goal 14, which calls for sustainable use of marine resources. Prior to utilization, the levels of undesirable substances need to be examined, and earlier studies on mesopelagic species have reported on total arsenic (As) content. However, the total As content does not give a complete basis for risk assessment since As can occur in different chemical species with varying toxicity. Read More

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Role of RNA modifications in carcinogenesis and carcinogen damage response.

Mol Carcinog 2022 May 13. Epub 2022 May 13.

Department of Medicine, Section of Dermatology, University of Chicago, Chicago, Illinois, USA.

The field of epitranscriptomics encompasses the study of post-transcriptional RNA modifications and their regulatory enzymes. Among the numerous RNA modifications, N -methyladenosine (m A) has been identified as the most common internal modification of messenger RNA (mRNA). Although m A modifications were first discovered in the 1970s, advances in technology have revived interest in this field, driving an abundance of research into the role of RNA modifications in various biological processes, including cancer. Read More

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Azo-Linked Porous Organic Polymers for Selective Carbon Dioxide Capture and Metal Ion Removal.

ACS Omega 2022 May 21;7(17):14535-14543. Epub 2022 Apr 21.

Mechanical Engineering Department, Faculty of Engineering, KFUPM, Dhahran 31261, Saudi Arabia.

The facile and environmentally friendly synthesis of porous organic polymers with designed polar functionalities decorating the interior frameworks as an excellent adsorbent for selective carbon dioxide capture and metal ion removal is a target worth pursuing for environmental applications. In this regard, two azo-linked porous organic polymers denoted man-Azo-P1 and man-Azo-P2 were synthesized in water by the azo-linking of 4,4'-diaminobiphenyl (benzidine) and 4,4'-methylenedianiline, respectively, with 1,3,5-trihydroxybenzene. The resulting polymers showed good BET surface areas of 290 and 78 m g for man-Azo-P1 and man-Azo-P2, respectively. Read More

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Enhanced expression of lectin-like oxidized LDL receptor-1 is implicated in the sodium arsenite-induced increase in foam cells from murine macrophages.

FASEB J 2022 May;36 Suppl 1

Department of Biological Sciences and Chemistry, Southern University and A&M College, Baton Rouge, LA.

Arsenic is a naturally occurring toxic element that is present in the air, food, soil, and water of many countries, including the U.S. The U. Read More

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Microbial metabolite mitigates arsenic induced oxidative stress, inflammation, and barrier dysfunction in gut epithelia.

FASEB J 2022 May;36 Suppl 1

Department of Microbiology and Immunology, University of Louisville, Louisville, KY.

The intestinal barrier acts as a physical and immunological defense against luminal microorganisms, viruses, food antigens, and environmental factors. Intestinal inflammation and the pathogenesis of inflammatory bowel diseases (IBD) are closely associated with loss of gut barrier integrity and increased immunological responses. Environmental heavy metal toxins like arsenic (iAs ) effectively regulates several cellular processes involved in cellular proliferation and homeostasis. Read More

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Hydrochemical characteristics of surface waters and their relationships to the Kashin-Beck Disease in Longzi County, Tibet.

Sci Rep 2022 May 12;12(1):7819. Epub 2022 May 12.

Key Laboratory of Ecosystem Network Observation and Modelling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, 100101, China.

Although previous studies have been reported between the Kashin-Beck Disease (KBD) epidemic and the hydrochemical characteristics of surface waters, the etiology of the disease remains unclear. In the present study, we comprehensively investigated the relationship between the KBD and the hydrochemical characteristics of surface waters in Longzi County. Results show that, the pH (mean = 7. Read More

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Sex Differences in Antioxidant Gene Expression in response to Chronic Arsenic Exposure.

FASEB J 2022 May;36 Suppl 1

Northern Arizona University, Flagstaff, AZ.

Inorganic arsenic is highly toxic metalloid considered a water contaminant that is naturally occurring through geological formations where it leaches into ground water sources and is anthropogenically sourced through pollution and found in surface water as a contaminant. Acute and chronic arsenic exposure can stimulate the production of reactive oxygen species and increase systemic oxidative stress. The aim of the present study was to investigate sex differences in the redox response induced by chronic arsenic exposure in a murine model. Read More

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Arsenic speciation transformation in soils with high geological background: New insights from the governing role of Fe.

Chemosphere 2022 May 9;302:134860. Epub 2022 May 9.

School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China; Institute of Environmental Geology, Inner Mongolia University, Hohhot, 010021, China. Electronic address:

In soils, the speciation transformation of As were inherently related to the behaviors of iron (oxyhydr) oxides. It is poorly understood that the effects of the transformation of iron (oxyhydr) oxides coupled with As speciation transformation during dissimilatory Fe(III) reduction (DIR) involving with humic substances (HS) as electron donor or shuttle in soils with high arsenic geological background. In this study, the relationships between the transformation of iron (oxyhydr)oxides and As speciation transformation were investigated according to the response between continuously As speciation monitoring and iron (oxyhydr) oxides identification during DIR in the soils. Read More

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Hydrogeochemical analysis of groundwater quality for drinking and irrigation with elevated arsenic and potential impact on agro-ecosystem in the upper Brahmaputra plain, India.

Environ Sci Pollut Res Int 2022 May 12. Epub 2022 May 12.

North Eastern Regional Institute of Water and Land Management, Tezpur, 784027, India.

The upper Brahmaputra floodplain is considerably enriched with geogenic contaminants, mainly Arsenic (As) exhibiting high spatial heterogeneity. With this concern, the present study was conducted in Lakhimpur district located in the upper Brahmaputra floodplain aiming to assess the groundwater (GW) suitability for drinking and irrigation. Chemical analysis of 78 GW samples revealed significantly high As (max 0. Read More

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'Omics in environmental epidemiological studies of chemical exposures: A systematic evidence map.

Environ Int 2022 Apr 12;164:107243. Epub 2022 Apr 12.

Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, D.C, USA. Electronic address:

Background: Systematic evidence maps are increasingly used to develop chemical risk assessments. These maps can provide an overview of available studies and relevant study information to be used for various research objectives and applications. Environmental epidemiological studies that examine the impact of chemical exposures on various 'omic profiles in human populations provide relevant mechanistic information and can be used for benchmark dose modeling to derive potential human health reference values. Read More

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Arsenic exposures and prostate cancer risk: A multilevel meta-analysis.

J Trace Elem Med Biol 2022 May 5;72:126992. Epub 2022 May 5.

Department of Public Health Sciences, College of Medicine, Pennsylvania State University, Hershey, PA, United States; Penn State Cancer Institute, Hershey, PA, United States. Electronic address:

Objective: Previous studies found that arsenic exposures have been linked to prostate cancer risk. However, this finding has been inconsistent. The purpose of this paper was to estimate the effects of arsenic exposures on prostate cancer risk. Read More

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Distribution characteristics of soil AM fungi community in soft sandstone area.

J Environ Manage 2022 May 9;316:115193. Epub 2022 May 9.

MOE Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China.

To explore the diversity and distribution characteristics of soil arbuscular mycorrhizae fungi (AMF) communities in the soft sandstone area, thirteen arsenic sandstone rock samples were collected from three planting plots (SI, SII and SIII) and one bare control plot (CK), separately. The sampling locations are as follows: the top of the slope (denoted by the number 1), sunny slope (2), shady slope (3) and gully bottom (4). These samples were then tested with an Illumina HiSeq PE250 high-throughput sequencing platform. Read More

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Assessing the Association of Element Imbalances With Arsenism and the Potential Application Value of Tratt Juice.

Front Pharmacol 2022 25;13:819472. Epub 2022 Apr 25.

The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education & School of Public Health, Guizhou Medical University, Guiyang, China.

Endemic arsenism caused by coal burning is a unique type of biogeochemical disease that only exists in China, and it is also a disease of element imbalances. Previous studies have shown that element imbalances are involved in the pathogenesis of arsenic; however, the interaction between the various elements and effective preventive measures have not been fully studied. This study first conducted a cross-sectional study of a total of 365 participants. Read More

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Therapeutic effects of CoenzymeQ10, Biochanin A and Phloretin against arsenic and chromium induced oxidative stress in mouse () brain.

3 Biotech 2022 May 21;12(5):116. Epub 2022 Apr 21.

Toxicology Division, ICMR-National Institute of Occupational Health, Ahmedabad, 380016 India.

Arsenic and chromium are the most common environmental toxicants prevailing in nature. Hence, the present study endeavors to investigate the salutary effects of Coenzyme Q10 (CoQ10), Biochanin A (BCA), and Phloretin (PHL) on the combined neurotoxic impact of arsenic and chromium in the mice (). Sodium meta-arsenite (100 ppm) and potassium dichromate (75 ppm) were given orally in conjugation with CoQ10 (10 mg/kg), BCA & PHL (50 mg/kg each) in accordance with body weight per day for the 2 weeks experimental duration. Read More

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Molecular mechanisms underlying ameliorative impact of melatonin against age-dependent chronic arsenic toxicity in rats' brains.

J Exp Zool A Ecol Integr Physiol 2022 May 11. Epub 2022 May 11.

Solid Tumor Research Center, Cellular and Molecular Medicine Institute, Urmia University of Medical Sciences, Urmia, Iran.

Accumulation of random molecular damage such as oxidative DNA damage and inflammation is extremely found to be involved in the aging process. Due to extreme energy requirements and high lipid levels, the brain is more susceptible to oxidative damage during aging especially under exposure to toxic elements such as arsenic. Therefore, this study was aimed to evaluate the ameliorative effects of melatonin, as a neurohormone, on the arsenic-induced behavioral abnormalities, and the underlying mechanisms. Read More

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[Research progress on the regulatory mechanism of non-coding RNA in arsenic toxicity].

Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2022 Apr;40(4):316-320

College of Public Health, Baotou Medical College, Baotou 014000, China.

Arsenic is a non-metallic element, and the International Agency for Research on Cancer has identified arsenic and its compounds as carcinogens. Arsenic and its compounds can be absorbed through the respiratory tract, skin and digestive tract, distributed in the liver, kidney, lung and skin, and cause damage. Non-coding RNAs are closely related to arsenic-induced nervous system disorders, cell necrosis, reproductive toxicity, and carcinogenesis. Read More

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Two-step micelle-to-solvent stacking of arsenic species from foods in permanently coated tubing for capillary electrophoresis.

J Chromatogr A 2022 May 3;1673:463112. Epub 2022 May 3.

College of Material Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, PR China. Electronic address:

An effective and sensitive two-step stacking of arsenic species by electrokinetic injection and micelle-to-solvent stacking (MSS) using zwitterionic surfactant 3-(N,N-dimethylpalmitylammonio) propane sulfonate was successfully developed in a co-electro-osmotic flow (co-EOF) capillary zone electrophoresis (CZE). The fused silica capillaries were coated with 1% hexadimethrine bromide solution to satisfy the condition of the same EOF direction between the test anions and capillary. The background solution was 100 mM borax buffer (pH 9. Read More

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