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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Identifying evidence for past mining and metallurgy from a record of metal contamination preserved in an ombrotrophic mire near Leadhills, SW Scotland, UK
Tim Mighall,Antonio Martínez Cortizas,Noemí Silva Sánchez,Ian D L Foster,Surjit Singh,Mark D. Bateman,John Pickin +6 more
TL;DR: A peat core, collected from Toddle Moss, was radiocarbon (14C) dated and analysed for trace metal concentrations (by EMMA) and lead isotopes (by ICP-MS) to reconstruct the atmospheric deposition history of trace metal contamination as discussed by the authors.
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Bacteria from the rhizosphere and tissues of As-hyperaccumulator Pteris vittata and their role in arsenic transformation.
Yong-He Han,Meng-Ru Jia,Xue Liu,Ying Zhu,Yue Cao,Deng-Long Chen,Yanshan Chen,Lena Q. Ma,Lena Q. Ma +8 more
TL;DR: It is concluded that both rhizobacteria and endobacteria were involved in As transformation in the rhizosphere and tissues of P. vittata.
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Mobility of metal(loid)s in roof dusts and agricultural soils surrounding a Zn smelter: Focused on the impacts of smelter-derived fugitive dusts
Min-Ju Kang,Soonyoung Yu,Soon Won Jeon,Myung Chae Jung,Yi Kyun Kwon,Pyeong-Koo Lee,Gi-Tak Chae +6 more
TL;DR: The mineralogical investigation combined with sequential extraction revealed that the different mobility of Zn, Cd, and Pb between fugitive dusts, roof dusts and agricultural soils resulted from the different solubility of metal-bearing minerals.
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Anti-tumor effects and apoptosis induction by Realgar bioleaching solution in Sarcoma-180 cells in vitro and transplanted tumors in mice in vivo.
TL;DR: RBS could substitute for traditional Realgar or its formula to work as a potent tool in cancer treatment as well as investigate its effects on in vitro and in vivo cell proliferation and apoptosis in Sarcoma-180 cell line.
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Microbially mediated reduction of FeIII and AsV in Cambodian sediments amended with 13C-labelled hexadecane and kerogen
Athanasios Rizoulis,Wafa M. Al Lawati,Wafa M. Al Lawati,Richard D. Pancost,David A. Polya,Bart E. van Dongen,Jonathan R. Lloyd +6 more
TL;DR: In this article, the authors showed that organic compounds that can be found in arsenic-rich subsurface sediments may be used by indigenous microorganisms, contributing to the release of arsenic from the sediments into the groundwater.
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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