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Magnetic parameters as proxies for anthropogenic pollution in water reservoir sediments from Mexico: An interdisciplinary approach.
Chaparro, Marcos A E; Ramírez-Ramírez, Margarita; Chaparro, Mauro A E; Miranda-Avilés, Raúl; Puy-Alquiza, María J; Böhnel, Harald N; Zanor, Gabriela A.
Affiliation
  • Chaparro MAE; Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires (CIFICEN, CONICET-UNCPBA), Pinto 399, 7000 Tandil, Argentina. Electronic address: chapator@exa.unicen.edu.ar.
  • Ramírez-Ramírez M; División de Ciencias de la Vida (DICIVA Universidad de Guanajuato), México.
  • Chaparro MAE; Centro Marplatense de Investigaciones Matemáticas (CEMIM-UNMDP-CONICET), Diagonal J. B. Alberdi 2695, Mar del Plata, Argentina.
  • Miranda-Avilés R; Departamento de Ingeniería en Minas, Metalurgia y Geología, Universidad de Guanajuato, México.
  • Puy-Alquiza MJ; Departamento de Ingeniería en Minas, Metalurgia y Geología, Universidad de Guanajuato, México.
  • Böhnel HN; Centro de Geociencias - UNAM, Boulevard Juriquilla No. 3001, 76230 Querétaro, México. Electronic address: hboehnel@geociencias.unam.mx.
  • Zanor GA; División de Ciencias de la Vida (DICIVA Universidad de Guanajuato), México. Electronic address: gzanor@ugto.mx.
Sci Total Environ ; 700: 134343, 2020 Jan 15.
Article in En | MEDLINE | ID: mdl-31677420
We assess the element pollution level of water reservoir sediments using environmental magnetism techniques as a novel approach. Although "La Purísima" Water Reservoir is an important source for multiple activities (e.g. recreational, fishing and agricultural) in Guanajuato state, it has been receiving for the last centuries a high load of pollutants by mining extraction, urbanization and land-use change from the Guanajuato Hydrological Basin. The analyses of environmental magnetism, geochemistry, X-ray energy dispersive spectroscopy, scanning electron microscopy and multivariate methods were applied to study sediments from the reservoir and basin. Accordingly, they indicate the presence of iron oxides (magnetite and hematite) and iron sulfides (pyrite and greigite), which evidences relevant differences in particle size and concentration within the water reservoir (median mass-specific magnetic susceptibility χ = 23.2 × 10-8 m3/kg), as well as with respect to the river basin sediments (median χ = 88.8 × 10-8 m3/kg). The highest enrichment factor EF values (median values of EF = 2-10 for As, Co, Ba, Cu, Cd, Ni and EF > 20 for S) are mainly associated with historical mining activities that have led to an enrichment of potentially toxic elements on these water reservoir sediments. We propose the use of concentration and grain size dependent magnetic parameters, i.e. χ, remanent magnetizations and anhysteretic ratios ARM/SIRM and χARM/χ, as proxies for Ba, Co, Cr, Ni, P and Pb pollution in these river and water reservoir sediments. Such parameters allow to evaluate this sedimentary environment, and similar ones, through useful and convenient proxies.
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Full text: 1 Collection: 01-internacional Database: MEDLINE Country/Region as subject: Mexico Language: En Journal: Sci Total Environ Year: 2020 Document type: Article Country of publication: Netherlands

Full text: 1 Collection: 01-internacional Database: MEDLINE Country/Region as subject: Mexico Language: En Journal: Sci Total Environ Year: 2020 Document type: Article Country of publication: Netherlands