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Oxidation of arsenite to arsenate by a bacterium isolated from an aquatic environment
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Oxidation of arsenite to arsenate by a bacterium isolated from an aquatic environment
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Journal Article
Oxidation of arsenite to arsenate by a bacterium isolated from an aquatic environment
1999
Overview
Arsenic is ubiquitous in the biosphere and frequently reported to be an environmental pollutant. Global cycling of arsenic is affected by microorganisms. This paper describes a new bacterial strain which is able to efficiently oxidize arsenite (As[III]) into arsenate (As[V]) in liquid medium. The rate of the transformation depends on the cell density. Arsenic species were separated by high performance liquid chromatography (HPLC) and quantified by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The strain also exhibits high minimum inhibitory concentrations (MICs) for As[III] (6.65 mM (500 mg L-1)) and other heavy metals, such as cadmium (1.42 mM (160 mg L-1)) or lead (1.20 mM (250 mg L-1)). Partial identification of the strain revealed a chemoorganotrophic, Gram-negative and motile rod. The results presented here demonstrate that this strain could represent a good candidate for arsenic remediation in heavily polluted sites.
Publisher
Springer Nature B.V
Subject
