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Title

Environmental geochemistry of recent volcanic ashes from Southern Andes

AuthorsRuggieri, Flavia ; Fernandez-Turiel, J. L. ; Saavedra Alonso, Julio ; Gimeno, D.; Polanco, E.; Naranjo, José Antonio
KeywordsChaitén
Cupahue
Hudson
Leaching
Llaima
Lonquimay
Southern Voolcanic Zone
Trace elements
Issue Date22-Jun-2011
PublisherCSIRO Publishing
CitationEnvironmental Chemistry 8(3): 236-247 (2011)
AbstractThe potential contribution to the local geochemical balance of five historical eruptions that occurred during the 20th Century has been investigated in the Southern Volcanic Zone (SVZ) of the Andean volcanic arc of South America (Lonquimay 1988, Hudson 1991, Copahue 2000, Llaima 2008, Chaitén 2008). These ashes were characterised by SEMEDX and XRD, and their potential released geochemical fluxes were examined using water and nitric acid batch leaching tests. Leachates were analysed by ICP-OES, ICP-MS and ISE. The major contents removed correspond to SO42– and Cl–. The potential toxic trace element (PTTE) content was highly variable among the ash samples following this order: Chaitén > Copahue > Hudson > Llaima > Lonquimay. The trace elements with significant load in water batch leaching tests include Fe > F > B > P > Zn > As > Mn > Sr > Ba > Ti > Cu > Ni > Li > Rb > Co > Cr > Cd > Sb. Some of these elements (As, Cu, F, Mo, Ni, Pb and Zn) are included in the drinking water guidelines due to their potential toxicity and must be especially monitored in the environmental assessment of these ashfall deposits.
Description41 páginas, 6 tablas y 2 figuras.
Publisher version (URL)http://dx.doi.org/10.1071/EN10097
URI10261/37769
DOI10.1071/EN10097
Appears in Collections:(ICTJA) Artículos
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