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Título del libro: Water-Rock Interaction - Proceedings Of The 13th International Conference On Water-Rock Interaction, Wri-13
Título del capítulo: Use of lead isotopes to identify pollution sources in Mexican mining sites, a case study

Autores UNAM:
PETER ERNST GEORG SCHAAF; GABRIELA NATALIA SOLIS PICHARDO;
Autores externos:

Idioma:
Inglés
Año de publicación:
2010
Palabras clave:

Aquatic sediments; Dug well; Isotopic ratios; Lead isotope; Lead pollution; Local community; Me-xico; Mining district; Mining sites; Pb concentration; Pollution sources; Sediment pollution; Sediment samples; Sediments and waters; Groundwater; Groundwater pollution; Isotopes; Lead; Sedimentology; Sediments; Soil pollution


Resumen:

Mining and refining activities can pollute soils, sediments and waters through the dispersion of tailings and smelter residues and emissions containing metals and other elements. This is the case of the mining district of Villa de la Paz-Matehuala (SLP) in the Northern part of Mexico, where lead pollution has been previously reported in soils, sediments and groundwater. Health affections in the local community have also being reported. To trace the origin of lead (Pb) pollution, we have collected aquatic sediment cores at two dug wells and at a groundwater discharging point downwards of the mine. Total Pb concentrations in sediments ranged 128-541 mg/kg. The Pb isotopic ratios (LIRs; 208Pb/ 206Pb and 207Pb/ 206Pb) determined in some selected sediment samples were compared with those obtained from tailings suggesting a contribution of the mine residues to the sediment pollution of the studied sites. © 2010 Taylor & Francis Group, London.


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