Journal ArticleDOI
The Ecology of Arsenic
Ronald S. Oremland,John F. Stolz +1 more
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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
Culturable associated-bacteria of the sponge Theonella swinhoei show tolerance to high arsenic concentrations
TL;DR: Results may provide an explanation for the ability of the sponge to accumulate considerable amounts of arsenic, and arsenic-mineralizing bacteria can potentially be used for the study of bioremediation, as arsenic toxicity affects millions of people worldwide.
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Considerations for conducting incubations to study the mechanisms of As release in reducing groundwater aquifers.
K. A. Radloff,Anya R. Manning,Brian J. Mailloux,Yan Zheng,Yan Zheng,Mohammad Moshiur Rahman,M. Rezaul Huq,Kazi Matin Ahmed,Alexander van Geen +8 more
TL;DR: The effectiveness of sterilization was evaluated using two indicators of microbial Fe reduction, changes in diffuse spectral reflectance and leachable Fe(II)/Fe ratios, as well as changes in P-extractable As concentrations in the solid phase.
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The role of denitrification on arsenite oxidation and arsenic mobility in an anoxic sediment column model with activated alumina.
TL;DR: This study illustrates a bioremediation or natural attenuation process based on anoxic microbial‐dependent oxidation of As(III) to more readily adsorbed As(V) as a means to enhance the immobilization of As on alumina oxide particles in subsurface environments.
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Arsenic uptake and bioaccumulation in plants: A review on remediation and socio-economic perspective in Southeast Asia
TL;DR: In this article, a review of the potential of nanomaterials and nanocomposites in treating arsenic-contaminated water has been presented, and a wide variety of nanoparticles have shown promising arsenic removal capacity, including iron nanoparticles, nano-zerovalent iron and carbon nanotubes.
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Distribution and speciation of arsenic after intravenous administration of monomethylmonothioarsonic acid in rats
TL;DR: Results indicate that arsenic accumulated preferentially in RBCs after being transformed to DMA(III), and the effect of MMMTA(V) was assumed to be a more toxic arsenic metabolite than non-thiolated MMA(V).
References
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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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