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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2017
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| Online Access: | https://www.redalyc.org/articulo.oa?id=37055174013 https://www.redalyc.org/journal/370/37055174013/ https://www.redalyc.org/journal/370/37055174013/html/ https://www.redalyc.org/journal/370/37055174013/37055174013.epub https://www.redalyc.org/journal/370/37055174013/movil https://doi.org/10.20937/RICA.2017.33.04.09 |
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Table of Contents:
- MERCURY POLLUTION ASSESSMENT OF MINING WASTES AND SOILS FROM FORMER SILVER AMALGAMATION AREA IN NORTH-CENTRAL MEXICO Adriana Karina LEURA VICENCIO Leticia CARRIZALES YAÑEZ Israel RAZO SOTO Ciencias de la Tierra tailings solubility reprocessing patio process bioaccessibility Mining wastes and soils from Cedral, San Luis Potosí, Mexico, were studied to assess mercury (Hg) pollution in areas of historical silver (Ag) amalgamation and in areas where amalgamation mining wastes were recently reprocessed for Hg and Ag recovery. The total, soluble and bioaccessible Hg concentrations from eight mining waste and nine soil cores were determined at varying depths, which fluctuated from the surface up to 1.0 m depth. The total Hg concentrations in the mining wastes samples ranged from 8 to 548 mg/kg. The total Hg concentrations in the soil samples were lower (1 to 116 mg/kg) than those in the mining wastes. Eighty percent of the soil samples exceeded the maximum permissible limit for residential soils according to the Mexican regulations, demonstrating the impacts of the amalgamation process in Cedral. The soluble Hg concentrations were low, from 0.009 to 0.32 mg/kg in the mining wastes, and from 0.003 to 0.02 mg/kg in soils. The latter represents 0.007 % to 0.54 % and < 0.03 % of total Hg, from mining wastes and soils, respectively, indicating low aqueous Hg transport during rainfall events. The bioaccessible Hg concentrations in the mining waste samples (0.1 to 60 mg/kg) and soil samples (0.1 to 17 mg/kg), suggested that humans could be exposed to this toxic element through the accidental ingestion of mining wastes and soil particles. Although the total Hg concentrations in the mining wastes decreased after reprocessing, the soluble and bioaccessible Hg concentrations increased. 2017 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37055174013 https://www.redalyc.org/journal/370/37055174013/ https://www.redalyc.org/journal/370/37055174013/html/ https://www.redalyc.org/journal/370/37055174013/37055174013.epub https://www.redalyc.org/journal/370/37055174013/movil https://doi.org/10.20937/RICA.2017.33.04.09 en http://www.redalyc.org/revista.oa?id=370 Revista Internacional de Contaminación Ambiental application/pdf Universidad Nacional Autónoma de México Revista Internacional de Contaminación Ambiental (México) Num.4 Vol.33