Occurrence of arsenite in surface and groundwater associated with a perennial stream located in Western Nebraska, USA

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dc.contributor.author Malakar, Arindam
dc.contributor.author Singh, Rajesh
dc.contributor.author Westrop, Jeffrey
dc.contributor.author Weber, Karrie A.
dc.contributor.author Elofson, Christopher N.
dc.contributor.author Kumar, Manish
dc.contributor.author Snow, Daniel D.
dc.coverage.spatial United States of America
dc.date.accessioned 2012-09-26T07:22:33Z
dc.date.available 2012-09-26T07:22:33Z
dc.date.issued 2021-08
dc.identifier.citation Malakar, Arindam; Singh, Rajesh; Westrop, Jeffrey; Weber, Karrie A.; Elofson, Christopher N.; Kumar, Manish and Snow, Daniel D., "Occurrence of arsenite in surface and groundwater associated with a perennial stream located in Western Nebraska, USA", Journal of Hazardous Materials, DOI: 10.1016/j.jhazmat.2021.126170, vol. 416, Aug. 2021. en_US
dc.identifier.issn 0304-3894
dc.identifier.uri https://doi.org/10.1016/j.jhazmat.2021.126170
dc.identifier.uri https://repository.iitgn.ac.in/handle/123456789/6690
dc.description.abstract Dissolved arsenic typically results from chemical weathering of arsenic rich sediments and is most often found in oxidized forms in surface water. The mobility of arsenic is controlled by its valence state and also by its association with iron oxides minerals, the forms of which are both influenced by abiotic and biotic processes in aqueous environment. In this study, speciation methods were used to measure and confirm the presence of reduced arsenic species in the surface water of Frenchman creek, a gaining stream that crosses the Colorado-Nebraska border. Selective extraction analysis of aquifer and stream bed sediments shows that the bulk of the arsenic occurs with labile iron-rich oxy(hydroxide) minerals. Total dissolved arsenic in surface and groundwater ranged from ~3–18 µg L−1, and reduced arsenic species comprise about 41% of the total dissolved arsenic (16.0 µg L−1) in Frenchman creek. Leachable arsenic in the aquifer sediment samples ranged up to 1553 µg kg−1, while samples from Frenchman creek bed sediments contained 4218 µg kg−1. Dynamic surface and groundwater interaction sustains arsenite in iron-rich surface headwaters, and the implied toxicity of reduced arsenic in this hydrogeological setting, which can be important in surface water environments around the globe.
dc.description.statementofresponsibility by Arindam Malakar, Rajesh Singh, Jeffrey Westrop, Karrie A. Weber, Christopher N. Elofson, Manish Kumar, Daniel D. Snow
dc.format.extent vol. 416
dc.language.iso en_US en_US
dc.publisher Elsevier en_US
dc.subject Arsenic en_US
dc.subject Surface-groundwater interaction en_US
dc.subject Reducing environment en_US
dc.subject Headwaters en_US
dc.subject Sediment en_US
dc.subject Speciation en_US
dc.title Occurrence of arsenite in surface and groundwater associated with a perennial stream located in Western Nebraska, USA en_US
dc.type Article en_US
dc.relation.journal Journal of Hazardous Materials


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