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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Role of metal-reducing bacteria in arsenic release from Bengal delta sediments
Farhana Islam,Andrew G. Gault,Christopher Boothman,David A. Polya,John M. Charnock,John M. Charnock,Debashis Chatterjee,Jonathan R. Lloyd +7 more
TL;DR: It is shown that anaerobic metal-reducing bacteria can play a key role in the mobilization of arsenic in sediments collected from a contaminated aquifer in West Bengal and that, for the sediments in this study, arsenic release took place after Fe(iii) reduction, rather than occurring simultaneously.
Journal ArticleDOI
Arsenic(V) removal from groundwater using nano scale zero-valent iron as a colloidal reactive barrier material.
TL;DR: The effects of competing anions revealed that HCO3-, H4SiO4(0), and H2PO4(2-) are potential interfering agents in the As(V) adsorption reaction.
Journal ArticleDOI
Arsenic removal using mesoporous alumina prepared via a templating method.
TL;DR: In this article, mesoprous alumina (MA) with a wide surface area (307 m2/g) and uniform pore size (3.5 nm) was prepared, and a spongelike interlinked pore system was developed through a post-hydrolysis method.
Journal ArticleDOI
Arsenic binding to proteins.
TL;DR: Although the adverse health effects arising from exposure to arsenic have been well-recognized, the mechanism(s) of action responsible for the diverse range of health effects are complicated and poorly understood.
Journal ArticleDOI
Arsenic and selenium in microbial metabolism.
TL;DR: This review highlights recent advances in ecology, biochemistry, and molecular biology and provides a prelude to the impact of genomics studies.
References
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Fate of [14C]arsanilic acid in pigs and chickens
TL;DR: Arsanilic acid uniformly labeled with {sup 14}C in the benzene ring was used to determine the metabolic fate of oral arsanilic acids in pigs and chickens as mentioned in this paper.
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Four Treatises of Theophrastus von Hohenheim called Paracelsus
TL;DR: The most striking figure among the physicians of the sixteenth century, perhaps in the whole of medical history, is Theophrastus von Hohenheim, called Paracelsus (1498-1541).
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Roxarsone Toxicity in the Chick as Influenced by-Dietary Cysteine and Copper and by Experimental Infection with Eimeria acervulina
Gail L. Czarnecki,David H. Baker +1 more
TL;DR: Cysteine, in fact, increased feed efficiency in birds fed excess copper in the absence of roxarsone, and depressed performance, increased kidney arsenic concentration, and enhanced mortality when added to diets containing toxic levels of roXarsone.