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.
Related projects:	Geological Processes and their Environmental Impact - Contact of the Variscides and Alpides