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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Microbial communities in rice rhizosphere altered by intermittent and continuous flooding in fields with long-term arsenic application
TL;DR: Bacterial community structure and composition were significantly different between As amended and unamended plots, as well as between the flooding treatments, suggesting differences in rhizosphere-microbial communities may have contributed to the lower pore-water arsenic concentrations in the intermittently flooded conditions.
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MIL series of metal organic frameworks (MOFs) as novel adsorbents for heavy metals in water: A review.
Han Zhang,Xin Hu,Tianxiao Li,Yuxuan Zhang,Hongxia Xu,Yuanyuan Sun,Xueyuan Gu,Chenggang Gu,Jun Luo,Bin Gao +9 more
TL;DR: In this article , a review of recent progress in the synthesis and application of MIL-based adsorbents for the removal of aqueous heavy metal ions is presented, which outlines prospects and future directions to promote the applications of MILs in treating heavy metal contaminated water.
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Evaluation of conceptual and numerical models for arsenic mobilization and attenuation during managed aquifer recharge.
TL;DR: Geochemical data from an injection experiment in The Netherlands was used to develop and evaluate conceptual and numerical models of arsenic release and attenuation under field-scale conditions, and a groundwater flow and nonreactive transport model was developed.
Journal ArticleDOI
Arsenic biogeochemical cycling in paddy soil-rice system: Interaction with various factors, amendments and mineral nutrients
Muhammad Hussain,Irshad Bibi,Nabeel Khan Niazi,Nabeel Khan Niazi,Muhammad Shahid,Jibran Iqbal,Muhammad Bilal Shakoor,Arslan Ahmad,Noor S. Shah,Prosun Bhattacharya,Kang Mao,Jochen Bundschuh,Yong Sik Ok,Hua Zhang +13 more
TL;DR: In this paper, the authors discussed the biogeochemical cycling of As in paddy soil-rice system, described the influence of critical factors such as pH, iron oxides, organic matter, microbial species, and pathways affecting As transformation and accumulation by rice, and elucidated As interaction with organic and inorganic amendments and mineral nutrients.
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Distribution of microbial arsenic reduction, oxidation and extrusion genes along a wide range of environmental arsenic concentrations
TL;DR: The environmental distribution of arsenic related genes suggests that the occurrence of different ArsC families provides different degrees of protection against arsenic as previously described in laboratory strains, and that the glutaredoxin (Grx)-linked arsenate reductases related to Enterobacteria do not confer enough arsenic resistance to live above certain levels of As concentrations.
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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