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
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Book ChapterDOI
Arsenic in Groundwater and the Environment
TL;DR: Awareness of the problems associated with arsenic in drinking water and the environment has grown significantly over the last two decades or so and today an enormous literature exists documenting its occurrence, behaviour and impacts in many places across the globe as mentioned in this paper.
Journal ArticleDOI
On the potential of biological treatment for arsenic contaminated soils and groundwater
Suiling Wang,Xiangyu Zhao +1 more
TL;DR: An evaluation on the feasibility of using biological methods for the remediation of arsenic contaminated soils and groundwater gives an evaluation of ex-situ bioleaching and biovolatilization.
Journal ArticleDOI
Interactions between the Fe(III)-reducing bacterium Geobacter sulfurreducens and arsenate, and capture of the metalloid by biogenic Fe(II).
Farhana Islam,R. L. Pederick,Andrew G. Gault,Laura K. Adams,David A. Polya,John M. Charnock,Jonathan R. Lloyd +6 more
TL;DR: Results demonstrate that G. sulfurreducens, a model Fe(III)-reducing bacterium, did not reduce As(V) enzymatically, despite the apparent genetic potential to mediate this transformation, and led to the formation of Fe(II)-bearing phases that are able to capture arsenic species and could act as sinks for arsenic in sediments.
Journal ArticleDOI
Molecular Analysis of Arsenate-Reducing Bacteria within Cambodian Sediments following Amendment with Acetate
TL;DR: Evidence is presented that the introduction of a proxy for organic matter (13C-labeled acetate) stimulated As(V) reduction in sediments collected from a Cambodian aquifer that hosts arsenic-rich groundwater, and an increase in the proportion of prokaryotes closely related to the dissimilatory As( V)-reducing bacteria Sulfurospirillum strain NP-4 and Desulfotomaculum auripigmentum.
Journal ArticleDOI
Bacterial metabolism of environmental arsenic—mechanisms and biotechnological applications
TL;DR: This review gives an overview of the current knowledge on bacterial interactions with arsenic and on biotechnologies for its detoxification and removal.
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.
Journal ArticleDOI
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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