Heavy metals contents in agricultural topsoils in the Ebro basin (Spain). Application of the multivariate geoestatistical methods to study spatial variations

Environ Pollut. 2006 Dec;144(3):1001-12. doi: 10.1016/j.envpol.2006.01.045. Epub 2006 Mar 31.

Abstract

In this work the content of seven heavy metals (Cd, Cr, Cu, Hg, Ni, Pb and Zn) and other parameters (the pH, organic matter, carbonates and granulometric fraction) in agricultural topsoil in the Ebro basin are quantified, based on 624 samples collected according to an 8 by 8 km square mesh. The average concentrations (mg/kg) obtained were: Cd 0.415+/-0.163, Cr 20.27+/-13.21, Cu 17.33+/-14.97, Ni 20.50+/-22.71, Pb 17.54+/-10.41, Zn 17.53+/-24.19 and Hg 35.6+/-42.05 microg/kg. The concentration levels are relatively low in areas of high pH and low organic matter content concentration. The results of factor analysis group Cd, Cu, Hg, Pb and Zn in F1 and Cr y Ni in F2. The spatial heavy metals component maps based on geostatistical analysis, show definite association of these factors with the soil parent material. The local anomalies (found in Cu, Zn and Pb) are attributed to anthropogenic influence.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Agriculture*
  • Cadmium / analysis
  • Chromium / analysis
  • Cities
  • Copper / analysis
  • Environmental Monitoring / methods*
  • Environmental Monitoring / statistics & numerical data
  • Geographic Information Systems
  • Lead / analysis
  • Mercury / analysis
  • Metals, Heavy / analysis*
  • Multivariate Analysis
  • Nickel / analysis
  • Soil Pollutants / analysis*
  • Spectrum Analysis
  • Zinc / analysis

Substances

  • Metals, Heavy
  • Soil Pollutants
  • Cadmium
  • Chromium
  • Lead
  • Copper
  • Nickel
  • Mercury
  • Zinc