Journal ArticleDOI
The Ecology of Arsenic
Ronald S. Oremland,John F. Stolz +1 more
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TLDR
This work reviews what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature and investigates their role in aquifers.Abstract:
Arsenic is a metalloid whose name conjures up images of murder. Nonetheless, certain prokaryotes use arsenic oxyanions for energy generation, either by oxidizing arsenite or by respiring arsenate. These microbes are phylogenetically diverse and occur in a wide range of habitats. Arsenic cycling may take place in the absence of oxygen and can contribute to organic matter oxidation. In aquifers, these microbial reactions may mobilize arsenic from the solid to the aqueous phase, resulting in contaminated drinking water. Here we review what is known about arsenic-metabolizing bacteria and their potential impact on speciation and mobilization of arsenic in nature.read more
Citations
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Journal ArticleDOI
Reductive dissolution and sequestration of arsenic by microbial iron and thiosulfate reduction
TL;DR: Investigating the geomicrobial impact on the behavior of As and stability of sequestered As in iron-rich sediment under anaerobic conditions found increase in Fe(II) concentrations in water was evidence of microbial-mediated iron reduction, while thiosulfate reduction induced immobilization of As through the precipitation of AsFeS.
OtherDOI
Framework for Evaluating Water Quality of the New England Crystalline Rock Aquifers
TL;DR: In this paper, a framework for characterizing the aquifer region into areas of similar hydrogeology is described and is based on hypothesized relevant physical features and chemical conditions (collectively termed "variables") that affect regional patterns of ground-water quality.
Journal ArticleDOI
Developmental arsenic exposure induces dysbiosis of gut microbiota and disruption of plasma metabolites in mice.
Hengchao Wu,Ruirui Wu,Xin Chen,Huamin Geng,Yuxin Hu,Lanyue Gao,Jing-qi Fu,Jingbo Pi,Yuan-Yuan Xu +8 more
TL;DR: The authors found that developmental arsenic exposure changed intestinal morphology and increased intestinal permeability and inflammation in mouse pups at weaning, and these alterations were accompanied by a significant change in gut microbiota, as evidenced by considerably reduced gut microbial richness and diversity.
Dissertation
Prokaryotic Arsenic Resistance - Studies in Bacillus subtilis
TL;DR: The present study shows that the arsK gene contributes to resistance towards both arsenite and arsenate, and the function of ArsK is important in an aerobic environment and that it decreases the inhibitory effect that arsenite has on the sporulation efficiency of B. subtilis.
References
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Journal ArticleDOI
A review of the source, behaviour and distribution of arsenic in natural waters
TL;DR: The scale of the problem in terms of population exposed to high As concentrations is greatest in the Bengal Basin with more than 40 million people drinking water containing ‘excessive’ As as mentioned in this paper.
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Worldwide Occurrences of Arsenic in Ground Water
TL;DR: Nordstrom et al. as mentioned in this paper argue that human health risks from arsenic in ground water can be minimized by incorporating hydrogeochemical knowledge into water management decisions and by more careful monitoring for arsenic in geologically high-risk areas.
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Arsenic poisoning of Bangladesh groundwater
TL;DR: Sedimentological study of the Ganges alluvial sediments shows that the arsenic derives from the reductive dissolution of arsenic-rich iron oxyhydroxides, which in turn are derived from weathering of base-metal sulphides.
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