Determining the origin of arsenic in the Lagunera region aquifer, Mexico using geochemical modeling

One century of arsenic exposure in Latin America: A review of history and occurrence from 14 countries

“…A natural source related with an extinct hydrothermal system was also proposed, based on the co-occurrence of boron, fluoride and lithium in As-polluted water (González-Hita et al, 1991). Subsequent hydrogeological, geological and hydrogeochemical studies led to the recognition of other natural processes like evaporation, dissolution of Fe and Mn oxides and sulfides oxidation, as causes for groundwater As enrichment (Ortega-Guerrero, 2003;Molina, 2004;Gutierrez-Ojeda, 2009). About 400,000 people were considered to be exposed to As concentrations N50 μg/L in that zone (Cebrián et al, 1994).…”