Geochemical processes controlling mobilization of arsenic and trace elements in shallow aquifers and surface waters in the Antequera and Poopo mining regions, Bolivian Altiplano
Article
Article Title | Geochemical processes controlling mobilization of arsenic and trace elements in shallow aquifers and surface waters in the Antequera and Poopo mining regions, Bolivian Altiplano |
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ERA Journal ID | 1949 |
Article Category | Article |
Authors | Ramos Ramos, Oswaldo Eduardo (Author), Rotting, Tobias S. (Author), French, Megan (Author), Sracek, Ondra (Author), Bundschuh, Jochen (Author), Quintanilla, Jorge (Author) and Bhattacharya, Prosun (Author) |
Journal Title | Journal of Hydrology |
Journal Citation | 518 (C), pp. 421-433 |
Number of Pages | 13 |
Year | 2014 |
Publisher | Elsevier |
Place of Publication | Amsterdam, Netherlands |
ISSN | 0022-1694 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jhydrol.2014.08.019 |
Abstract | A geochemical approach was applied to understand the factors controlling the mobilization of As and trace elements (TEs) in mining areas of the Poopo and Antequera River sub-basins on the Bolivian Altiplano. A total of 52 samples (surface, groundwater and geothermal water) were collected during the rainy season (2009). Arsenic, Cd and Mn concentrations exceed World Health Organization (WHO) drinking water guidelines and Bolivian regulations for drinking water in 28 groundwater samples, but Cu, Ni, Pb and Zn do not. Arsenic, Cd, Mn, Pb and Zn concentrations exceed World Health Organization guidelines for drinking water and Bolivian regulations Class A standard for discharge to water bodies in 20 surface water samples, whereas levels of Cu do not, and Ni and Fe rarely exceed regulation and guideline values. Factor analysis was applied to 18 hydrochemical parameters of 52 samples. Five factors for groundwater (plagioclase weathering, dissolution of gypsum and halite, TEs mobilization at acidic pH, sulfide oxidation, and release of As) account for 86.5% of the total variance for Antequera and 83.9% for Poopo sub-basins. Four factors for surface water data (weathering and mobilization of TEs influenced by pH, dissolution of evaporate salts, neutralization of acid mine drainage, and As release due to dissolution of Mn and Fe oxides) account for 91% of the total variance in Antequera and 96% in Poopo sub-basins. 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. Presence of both natural and anthropogenic sources of contamination requires careful monitoring of water quality. |
Keywords | arsenic; Bolivian Altiplano; groundwater; Poopo basin; surface water; trace elements |
ANZSRC Field of Research 2020 | 370704. Surface water hydrology |
370799. Hydrology not elsewhere classified | |
400499. Chemical engineering not elsewhere classified | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Higher University of San Andreas, Bolivia |
Newcastle University, United Kingdom | |
University College London, United Kingdom | |
Palacky University Olomouc, Czech Republic | |
National Centre for Engineering in Agriculture | |
KTH Royal Institute of Technology, Sweden | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2x91/geochemical-processes-controlling-mobilization-of-arsenic-and-trace-elements-in-shallow-aquifers-and-surface-waters-in-the-antequera-and-poopo-mining-regions-bolivian-altiplano
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