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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Journal ArticleDOI
Arsenotrophy: A pragmatic approach for arsenic bioremediation
TL;DR: In this paper , the authors discuss about the different aspects of arsenic contamination and its ill-effects on human health, microbial role in As-geocycling, modulation of microbial system for As resistance and detoxification and detailed prospects of arsenotrophy, its mechanisms, and plant-microbe interaction for As bioremediation.
Book ChapterDOI
Recent advances in biological treatment processes for wastewater and water treatment
Parimal Pal,Ramesh Kumar +1 more
TL;DR: In this article, a classification of the biobased treatment technologies on the basis of the modes and actions of microbial species is done, and the effectiveness of biological treatment in the contexts of quite a few industrial sectors is described highlighting success and scope for development.
Journal ArticleDOI
Inhibition of arsenite methylation induces synergistic genotoxicity of arsenite and benzo(a)pyrene diol epoxide in SCC-7 cells
TL;DR: It can be inferred that B PDE and As(iii) synergistically cause genotoxicity, and the possible mechanism is that BPDE inhibits arsenic methylation, leading to cellular As(ii) enrichment.
Journal ArticleDOI
Tolerance to individual and joint effects of arsenic and Bacillus thuringiensis subsp. israelensis or Lysinibacillus sphaericus in Culex mosquitoes.
TL;DR: Results indicate tolerance of these Culex species to arsenic exposures, and why this may occur is discussed.
Journal ArticleDOI
High Arsenic Levels Increase Activity Rather than Diversity or Abundance of Arsenic Metabolism Genes in Paddy Soils.
Si-Yu Zhang,Si-Yu Zhang,Xiao Xiao,Song-Can Chen,Yong-Guan Zhu,Guo-Xin Sun,Konstantinos T. Konstantinidis,Konstantinos T. Konstantinidis +7 more
TL;DR: In this article, the authors applied metagenomics and metatranscriptomics to paddy soils showing a gradient of As concentrations to investigate As resistance genes (ars) including arsR, acr3, arsB, arssC, arrA, arrM, arrI, arrP, arrH and arrA genes.
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.
Journal ArticleDOI