Arsenic phase distribution in Zimapán mine tailings, Mexico
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| Format: | Artículo científico |
| Langue: | en |
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Universidad Nacional Autónoma de México
2003
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| _version_ | 1876474671134670848 |
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| author | M. Méndez |
| author_facet | M. Méndez |
| contents | Arsenic phase distribution in Zimapán mine tailings, Mexico M. Méndez M. A. Armienta Ciencias de la Tierra México Arsenic Zimapán mine tailings solid speciation Arsenic contamination of groundwater has been linked to natural and anthropogenic sources in Zimapán, Mexico. Leachingof mine tailings was identified as one of the man-made causes of environmental arsenic pollution. Arsenic mobility from fourtailing piles was studied by chemical procedures. Conductivity, concentration of sulfates, and pH in aqueous leachates were usedas indicators of the physico-chemical conditions influencing arsenic mobility. Arsenic geochemical fractionation was determinedthrough sequential extraction from the tailings. High arsenic contents from 2550 mg/kg to 21 400 mg/kg were found in all thetailings. Most arsenic was contained in the residual considered more stable, and in iron and aluminium oxyhydroxides fractions.Arsenic found in the soluble and exchangeable fractions (up to 1560 mg/kg) may mobilize easily and pollute the environment. Onthe other hand, presence of calcite in the tailings may decrease arsenic leaching. Arsenic and sulfate contents, speciation, and pH,indicate that the recent pile is a major source of pollution. This shows that even stable forms of arsenic may mobilize and mayrepresent an environmental risk. Higher pH is observed to prevent the dissolution of arsenic bound to carbonates. Hence, additionof calcium oxide or calcite to the tailings is recommended. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842111 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| format | Artículo científico |
| id | redalyc_56842111 |
| institution | Redalyc |
| language | en |
| publishDate | 2003 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | Arsenic phase distribution in Zimapán mine tailings, Mexico M. Méndez Ciencias de la Tierra México Arsenic Zimapán mine tailings solid speciation Arsenic phase distribution in Zimapán mine tailings, Mexico M. Méndez M. A. Armienta Ciencias de la Tierra México Arsenic Zimapán mine tailings solid speciation Arsenic contamination of groundwater has been linked to natural and anthropogenic sources in Zimapán, Mexico. Leachingof mine tailings was identified as one of the man-made causes of environmental arsenic pollution. Arsenic mobility from fourtailing piles was studied by chemical procedures. Conductivity, concentration of sulfates, and pH in aqueous leachates were usedas indicators of the physico-chemical conditions influencing arsenic mobility. Arsenic geochemical fractionation was determinedthrough sequential extraction from the tailings. High arsenic contents from 2550 mg/kg to 21 400 mg/kg were found in all thetailings. Most arsenic was contained in the residual considered more stable, and in iron and aluminium oxyhydroxides fractions.Arsenic found in the soluble and exchangeable fractions (up to 1560 mg/kg) may mobilize easily and pollute the environment. Onthe other hand, presence of calcite in the tailings may decrease arsenic leaching. Arsenic and sulfate contents, speciation, and pH,indicate that the recent pile is a major source of pollution. This shows that even stable forms of arsenic may mobilize and mayrepresent an environmental risk. Higher pH is observed to prevent the dissolution of arsenic bound to carbonates. Hence, additionof calcium oxide or calcite to the tailings is recommended. 2003 artículo científico 0016-7169 https://www.redalyc.org/articulo.oa?id=56842111 en http://www.redalyc.org/revista.oa?id=568 Geofísica Internacional application/pdf Universidad Nacional Autónoma de México Geofísica Internacional (México) Num.1 Vol.42 |
| title | Arsenic phase distribution in Zimapán mine tailings, Mexico |
| topic | Ciencias de la Tierra México Arsenic Zimapán mine tailings solid speciation |
| url | https://www.redalyc.org/articulo.oa?id=56842111 |