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Título del libro: Water-Rock Interaction
Título del capítulo: Arsenic in groundwater at an abandoned mining area in Central Mexico

Autores UNAM:
ELOISA DOMINGUEZ MARIANI; SOFIA ESPERANZA GARRIDO HOYOS;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Resumen:

This study was carried out in an abandoned mining area of Central Mexico, with Ag-galena and spharelite deposits. The rising of groundwater level floods once abandoned mines and local people use the water for supply. This paper describes the geochemistry of groundwater in this site with special attention to values of As. Groundwater has high arsenic values (0.04?0.26 mg/L). Fe, Mn, Pb and Cd were also detected at concentrations above the Mexican drinking water standards. XRD mineral determinations, hydrogeochemistry and saturation indices suggest that arsenic is sorbed to iron oxides and oxyhydroxides as an effective form of retention. Only small changes in pH values may cause high concentrations of As soluble in groundwater. © 2010 Taylor & Francis Group, London.


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