Multiscale análisis of heavy metal contents in Spanish agricultural topsoils

Rodríguez Martín, José Antonio and Nanos, Nikolaos and Grau Corbi, José Manuel and Gil Sanchez, Luis Alfonso and López Arias, Manuel (2008). Multiscale análisis of heavy metal contents in Spanish agricultural topsoils. "Chemosphere", v. 70 (n. 6); pp. 1085-1096. ISSN 0045-6535. https://doi.org/10.1016/j.chemosphere.2007.07.056.

Description

Title: Multiscale análisis of heavy metal contents in Spanish agricultural topsoils
Author/s:
  • Rodríguez Martín, José Antonio
  • Nanos, Nikolaos
  • Grau Corbi, José Manuel
  • Gil Sanchez, Luis Alfonso
  • López Arias, Manuel
Item Type: Article
Título de Revista/Publicación: Chemosphere
Date: January 2008
ISSN: 0045-6535
Volume: 70
Subjects:
Freetext Keywords: Heavy metals; Agricultural topsoils; Spatial variation; Multivariate geostatistics; Spain
Faculty: E.T.S.I. Montes (UPM)
Department: Silvopascicultura [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

This study characterized and mapped the spatial variability patterns of seven topsoil heavy metals (Cr, Ni, Pb, Cu, Zn, Hg and Cd) within the Ebro river basin (9.3 million ha) by Multivariate Factorial Kriging. The variograms and cross-variograms of heavy metal concentrations showed the presence of multiscale variation that was modeled using three variogram models with ranges of 20 km (short-range), 100 km (medium-range) and 225 km (long-range). Our results indicate that the heavy metal concentration is influenced by bedrock composition and dynamics at all the spatial scales, while human activities have a notorious effect only at the short- and medium- range scale of variation. Sources of Cu, Pb and Zn (and secondary Cd) are associated with agricultural practices (at the short-range scale of variation), whereas Hg variation at the short- and medium-range scale of variation is related to atmospheric deposition.

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