Natural occurrence and controls of arsenic in groundwater in a semiarid basin in the Mexican Altiplano

Autor: Dario Cauich-Kau, Thomas R. Rüde, Antonio Cardona-Benavides, Javier Castro-Larragoitia
Rok vydání: 2022
Předmět:
Zdroj: Hydrogeology journal 30(8), 2459-2477 (2022). doi:10.1007/s10040-022-02562-w
ISSN: 1435-0157
1431-2174
Popis: The sources, mobility, and controlling processes of arsenic (As) in an aquifer system in the Cerritos-Guadalcazar area of Central Mexico were investigated. High As concentrations (up to 128 μg/L) in groundwater were found to be associated with both primary sources (rocks and tailings) and secondary sources (soil and sediments). The high As concentrations in the otherwise pristine Cerritos shallow granular aquifer are the result of a distant source of As-rich sediments eroded from a mineralized area in the recharge zone of a karstic aquifer. An intermediate groundwater flow system delivers the As load from the karstic to the granular aquifer. In addition, identification of a Na–Cl water type in the shallow granular aquifer indicates a regional flow; however, additional information is needed to corroborate this assumption. Local flows in the karstic aquifer are Ca–HCO3 water type with low (
Databáze: OpenAIRE
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