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Background levels of potentially toxic elements in soils : A case study in Catamarca (a semiarid region in Argentina)

Auteur(s) et Affiliation(s)

ROCA, N.
Unitat de Fisiologia Vegetal, Fac. de Biologia, Univ., Barcelona, Espagne
Fac. de Agronomía - Univ. Nacional del Centro de la Provincia de Buenos Aires, Azul, Argentine
PAZOS, M.S.
Unitat de Fisiologia Vegetal, Fac. de Biologia, Univ., Barcelona, Espagne
BECH, J.
Unitat de Fisiologia Vegetal, Fac. de Biologia, Univ., Barcelona, Espagne


Description :
Thirty soil profiles from the agricultural area of Fray Mamerto Esquiú (Catamarca, Argentina) were investigated, and the variability in the natural backgroundlevels of seven heavy metals (Cd, Cr, Cu, Mn, Ni, Pb and Zn) was examined. Sampling sites with minimal anthropogenic influence were selected, and soil profile samples were analysed for major and trace element content. The heavy metal with the greatest number of samples and slight enrichment anomalies is Cd. Slight enrichment anomalies in Cd, Cr, Cu, Pb and Zn were detected in profile 29, confirming anthropogenic contamination. The results of this study confirm the importance of the local determination of background concentrations. The percentage of organic matter is the determining factor in the presence and distribution of the metals (Cu, Fe, Mn and Zn) available in the soils of the studied area, the top horizon having the greatest accumulation.


Type de document :
Article de périodique

Source :
Catena (Giessen), issn : 0341-8162, 2012, vol. 92, p. 55-66, nombre de pages : 12, Références bibliographiques : 41 ref.

Date :
2012

Editeur :
Pays édition : Allemagne, Cremlingen-Destedt, Catena

Langue :
Anglais
Droits :
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