Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico
Anthropogenic activities have greatly increased heavy metal pollution worldwide. Due to inadequate waste management, mining is one of the chief causes. One particularly affected area in Mexico is the “La Zacatecana” Lagoon, in the municipality of Guadalupe, Zacatecas. From colonial times until the m...
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Wiley
2018-01-01
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| Series: | Applied and Environmental Soil Science |
| Online Access: | http://dx.doi.org/10.1155/2018/9612412 |
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| author | Sergio A. Covarrubias Juan Armando Flores de la Torre María Maldonado Vega Francisco Javier Avelar González Juan José Peña Cabriales |
| author_facet | Sergio A. Covarrubias Juan Armando Flores de la Torre María Maldonado Vega Francisco Javier Avelar González Juan José Peña Cabriales |
| author_sort | Sergio A. Covarrubias |
| collection | DOAJ |
| description | Anthropogenic activities have greatly increased heavy metal pollution worldwide. Due to inadequate waste management, mining is one of the chief causes. One particularly affected area in Mexico is the “La Zacatecana” Lagoon, in the municipality of Guadalupe, Zacatecas. From colonial times until the mid-nineteenth century, about 20 million tons of mine tailings were deposited at this site. Here, we catalogue the heavy metal content and their distribution in soils and sediments of La Zacatecana. The mobility of lead in soils was also assayed by sequential extraction. Concentrations of the different metals analysed were as follows: Pb > Cr > As > Ni > Hg > Cd. Site VIII accumulated the highest amount of Pb (3070 mg·kg−1) sevenfold more than the limit established by the Mexican standards for agricultural soils (i.e., 400 mg·kg−1). On the other hand, the contents of Cd, Cr, and Ni were within the levels accepted by the above normativity, set at 37, 280, and 1600 mg·kg−1, respectively. Concentrations of Hg and Pb were highest in the north-northwest zone of the lagoon and decreased towards the southeast. Except for Site VIII where 30% of the Pb was in an interchangeable form or bound to carbonates, most Pb in La Zacatecana soils was present in an unavailable form, associated with Fe-Mn oxides. |
| format | Article |
| id | doaj-art-4f446d37818d49fdb2ec5f9913d57822 |
| institution | Kabale University |
| issn | 1687-7667 1687-7675 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
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| series | Applied and Environmental Soil Science |
| spelling | doaj-art-4f446d37818d49fdb2ec5f9913d578222025-02-03T01:12:48ZengWileyApplied and Environmental Soil Science1687-76671687-76752018-01-01201810.1155/2018/96124129612412Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, MexicoSergio A. Covarrubias0Juan Armando Flores de la Torre1María Maldonado Vega2Francisco Javier Avelar González3Juan José Peña Cabriales4Laboratorio de Microbiología Ambiental, Departamento de Bioquímica y Biotecnología, Centro de Investigaciones y Estudios Avanzados del Instituto Politécnico Nacional, Unidad Irapuato, Irapuato, GTO, MexicoUniversidad Autónoma de Aguascalientes, Avenida Universidad No. 940, Aguascalientes 20231, AGS, MexicoDirección de Planeación, Enseñanza e Investigación del Hospital Regional de Alta Especialidad del Bajío, Leon, GTO, MexicoUniversidad Autónoma de Aguascalientes, Avenida Universidad No. 940, Aguascalientes 20231, AGS, MexicoLaboratorio de Microbiología Ambiental, Departamento de Bioquímica y Biotecnología, Centro de Investigaciones y Estudios Avanzados del Instituto Politécnico Nacional, Unidad Irapuato, Irapuato, GTO, MexicoAnthropogenic activities have greatly increased heavy metal pollution worldwide. Due to inadequate waste management, mining is one of the chief causes. One particularly affected area in Mexico is the “La Zacatecana” Lagoon, in the municipality of Guadalupe, Zacatecas. From colonial times until the mid-nineteenth century, about 20 million tons of mine tailings were deposited at this site. Here, we catalogue the heavy metal content and their distribution in soils and sediments of La Zacatecana. The mobility of lead in soils was also assayed by sequential extraction. Concentrations of the different metals analysed were as follows: Pb > Cr > As > Ni > Hg > Cd. Site VIII accumulated the highest amount of Pb (3070 mg·kg−1) sevenfold more than the limit established by the Mexican standards for agricultural soils (i.e., 400 mg·kg−1). On the other hand, the contents of Cd, Cr, and Ni were within the levels accepted by the above normativity, set at 37, 280, and 1600 mg·kg−1, respectively. Concentrations of Hg and Pb were highest in the north-northwest zone of the lagoon and decreased towards the southeast. Except for Site VIII where 30% of the Pb was in an interchangeable form or bound to carbonates, most Pb in La Zacatecana soils was present in an unavailable form, associated with Fe-Mn oxides.http://dx.doi.org/10.1155/2018/9612412 |
| spellingShingle | Sergio A. Covarrubias Juan Armando Flores de la Torre María Maldonado Vega Francisco Javier Avelar González Juan José Peña Cabriales Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico Applied and Environmental Soil Science |
| title | Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico |
| title_full | Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico |
| title_fullStr | Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico |
| title_full_unstemmed | Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico |
| title_short | Spatial Variability of Heavy Metals in Soils and Sediments of “La Zacatecana” Lagoon, Mexico |
| title_sort | spatial variability of heavy metals in soils and sediments of la zacatecana lagoon mexico |
| url | http://dx.doi.org/10.1155/2018/9612412 |
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