TY - GEN
T1 - Geochemical processes controlling mobilization of arsenic and Trace Elements in shallow aquifers in mining regions, Bolivian Altiplano
AU - Ramos Ramos, O. E.
AU - Quino, I.
AU - Quintanilla, J.
AU - Bhattacharya, P.
AU - Bundschuh, J.
PY - 2014
Y1 - 2014
N2 - A geochemical approach was applied to understand the factors controlling the mobilization of As and trace elements (TEs) in these mining areas. A total of 30 samples (wells and geothermal water) were collected during the rainy season (2009). As, Cd and Mn concentrations exceed WHO drinking guidelines in some groundwater samples, but Cu, Ni, Pb and Zn do not. Factor analysis of the groundwater chemical data suggests the following geochemical processes: i) plagioclase weathering, ii) dissolution of gypsum and halite, iii) trace element mobilization at acidic pH, iv) sulfide oxidation, and v) release of As following competition with phosphate and bicarbonate for adsorption sites. The As and TEs mobilized in these regions could affect the local water sources, which is a prevalent concern with respect to water resource management in this semi-arid Altiplano region.
AB - A geochemical approach was applied to understand the factors controlling the mobilization of As and trace elements (TEs) in these mining areas. A total of 30 samples (wells and geothermal water) were collected during the rainy season (2009). As, Cd and Mn concentrations exceed WHO drinking guidelines in some groundwater samples, but Cu, Ni, Pb and Zn do not. Factor analysis of the groundwater chemical data suggests the following geochemical processes: i) plagioclase weathering, ii) dissolution of gypsum and halite, iii) trace element mobilization at acidic pH, iv) sulfide oxidation, and v) release of As following competition with phosphate and bicarbonate for adsorption sites. The As and TEs mobilized in these regions could affect the local water sources, which is a prevalent concern with respect to water resource management in this semi-arid Altiplano region.
UR - http://www.scopus.com/inward/record.url?scp=84907359855&partnerID=8YFLogxK
U2 - 10.1201/b16767-90
DO - 10.1201/b16767-90
M3 - Contribución a la conferencia
AN - SCOPUS:84907359855
SN - 9781138001411
T3 - One Century of the Discovery of Arsenicosis in Latin America (1914-2014): As 2014 - Proceedings of the 5th International Congress on Arsenic in the Environment
SP - 239
EP - 241
BT - One Century of the Discovery of Arsenicosis in Latin America (1914-2014)
PB - CRC Press/Balkema
T2 - 5th International Congress on Arsenic in the Environment, As 2014
Y2 - 11 May 2014 through 16 May 2014
ER -