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| Main Author: | |
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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional Autónoma de México
2019
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| Online Access: | https://www.redalyc.org/articulo.oa?id=37066309007 https://www.redalyc.org/journal/370/37066309007/ https://www.redalyc.org/journal/370/37066309007/html/ https://www.redalyc.org/journal/370/37066309007/37066309007.epub https://www.redalyc.org/journal/370/37066309007/movil https://doi.org/10.20937/RICA.2019.35.04.07 |
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Table of Contents:
- ASSESSMENT OF A SIMPLE EXTRACTION METHOD TO DETERMINE THE BIOACCESSIBILITY OF POTENTIALLY TOXIC Tl, As, Pb, Cu, Zn AND Cd IN SOILS CONTAMINATED BY MINING-METALLURGICAL WASTE Yusniel CRUZ-HERNÁNDEZ Alicia SANTANA-SILVA Mario VILLALOBOS Francisco ROMERO Elizabeth HERNÁNDEZ-ÁLVAREZ Teresa PI-PUIG Ciencias de la Tierra pH HCl SBRC speciation mining residues The potential to determine the gastric bioaccessibility (BA) of Tl, As, Pb(II), Cu(II), Zn(II) and Cd(II) using a simple extraction method was evaluated in selected samples from soils contaminated by mining and metallurgical wastes. The SBRC (Solubility and Bioavailability Research Consortium) test was used as a gastric BA comparative method versus a simple extraction method using HCl solution at pH 1.5. High cor- relations (r ≥ 0.98, p ˂ 0.01) were obtained between the two extraction methods for Cd(II), Cu(II), Tl and Zn(II), in all samples investigated. Bioaccessible As, however, only showed a high correlation in the metallurgical area (r = 0.99, p ˂ 0.01), but not in the mining area (r = 0.88, p ˂ 0.01). Conversely, Pb(II) showed a better correlation in samples from the mining area (r = 0.99, p ˂ 0.01) than in those of the metallurgical area (r = 0.92, p ˂ 0.01). Three experimental conditions of the extraction procedures ensured the high correlations observed: (1) Maintaining a strict pH control of 1.5 (± 0.1), (2) a stirring time of 1 h (± 1 min), and (3) filtration of the extraction mixture through a membrane of small pore size (0.05 µm). Bioaccessible Tl was detected in all samples, a fact that has not been reported before in these environments, and alerts to potential health risks not previously identified. 2019 artículo científico 0188-4999 https://www.redalyc.org/articulo.oa?id=37066309007 https://www.redalyc.org/journal/370/37066309007/ https://www.redalyc.org/journal/370/37066309007/html/ https://www.redalyc.org/journal/370/37066309007/37066309007.epub https://www.redalyc.org/journal/370/37066309007/movil https://doi.org/10.20937/RICA.2019.35.04.07 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.35