Geochemical and Hydrogeochemical Processes Determining Arsenic Presence in Rocks and Groundwater in the Southeastern Portion of El Bajío Guanajuatense, Guanajuato, Mexico
José Ivan Morales-Arredondo, María A. Armienta Hernández, Eduardo A. Lugo-Dorantes, Fátima Juárez-Aparicio, Francisco Romero, Zaknite I. Flores-Ocampo
Journal of Earth Science ›› 2024, Vol. 35 ›› Issue (6) : 2099-2118.
Geochemical and Hydrogeochemical Processes Determining Arsenic Presence in Rocks and Groundwater in the Southeastern Portion of El Bajío Guanajuatense, Guanajuato, Mexico
Several aquifers located in North-Central Mexico have natural arsenic (As) concentrations higher than those allowed by national and international regulations; these aquifers are usually located in fractured volcanic environments that interact with sedimentary basins and have a carbonate basement. In this study, an evaluation of As in volcanic and sedimentary rocks collected at 13 sampling sites along the Sierra de Codornices (Guanajuato State, Central Mexico) was carried out. These geologic materials are representative of the dominant hydrogeologic environment. The As content is disseminated in volcanic rocks and the highest contents were obtained in felsic rocks; this information served to identify the hydrogeochemical processes related to the mobilization and transport of arsenic in the aquifer. The mobilization of As is a product of the dissolution of volcanic glass, a process involved in the alkaline desorption that occurs on As-containing mineral surfaces and possibly by the dissolution/desorption of Fe minerals and some clays, all these processes may be accelerated by the geothermal characteristics of the groundwater in the study area.
|
|
|
|
|
|
|
|
|
AWWA APHA WWF. Standard Methods for the Examination of Water and Wastewater, 2005 Washington, D. C. American Public health Association, The American Water Works Association, Association Water Environment Federation
|
|
|
|
|
|
|
|
|
|
|
del Río Varela, P., Nieto-Samaniego, Á. F., Alaniz-Álvarez, S. A., et al., 2020. Geología y Estructura de Las Sierras de Guanajuato y Codornices, Mesa Central, México. Boletín de la Sociedad Geológica Mexicana, 72(1). https://doi.org/10.18268/bsgm2020v72n1a071019
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
NOM-127-SSA1-1994-2000. Norma Oficial Mexicana ‘Salud ambiental, agua para uso y consumo humano-límites permisibles de calidad y tratamientos a que debe someterse el aguapara su potabilización’, 2000
|
NOM-230-SSA1-2002. Norma Oficial Mexicana, Salud ambiental. Agua para uso y consumo humano, requisitos sanitarios que se deben cumplir en los sistemas de abastecimiento públicos y privados durante el manejo del agua. Procedimientos sanitarios para el muestreo in, 2002
|
|
|
|
|
|
|
|
|
|
|
|
|
|
United States Environmental Protection Agency (USEPA). Summary of Method. En method 6200 “Field Portable X-Ray Fluorescence Spectrometry for the Determination of Elemental Concentrations in Soil and Sediment”, 2007 3
|
|
|
|
|
|
|
|
|
|
|
|
|
/
〈 |
|
〉 |