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

• 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
• 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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