Distribution and mobility of arsenic in the Río Dulce alluvial aquifers in Santiago del Estero Province, Argentina

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Authors

BHATTACHARYA Prosun CLAESSON Mattias BUNDSCHUH Jochen ŠRÁČEK Ondřej FAGERSBERG Jens JACKS Gunnar MARTIN Raul A. DEL STORNIOLO Angel R. THIR Juan M.

Year of publication 2006
Type Article in Periodical
Magazine / Source Science ot the Total Environment
MU Faculty or unit

Faculty of Science

Citation
Field Geochemistry
Keywords arsenic; moblization; Río Dulce alluvial cone; Argentina; volcanic ash; sediments; adsorption; oxides
Description Factors controlling arsenic mobilization in the aquifers of the Río Dulce alluvial cone were investigated. Volcanic ash was suggested as a primary source of arsenic. Elevated pH values and competition with other oxyanions for adsorption sites promote release of arsenic. Organic matter from excessive irrigation may promote release of arsenic locally.
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