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Concentrations of available heavy metals in Mediterranean agricultural soils and their relation with some soil selected properties: a case study in typical mediterranean soils
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Orientador(es)
Resumo(s)
The characterization of the content of trace metals in soils is an instrument in
many programs of environmental protection, including the establishment of regional-level
standards to detect sites affected by contamination. The objectives of the present study
were to study the available levels of Cd, Cr, Cu, Ni, Pb, and Zn in surface horizons of
agricultural soils in a typical European Mediterranean region, to establish the geochemical baseline concentration (GBC), background level (BL), and reference value (RV) of each of
these available metals, and to investigate their possible correlations with soil properties.
To establish the GBC and RV values, we used the “standard threshold method”. Topsoil
samples (0–20 cm) were collected from 630 sites, and extracted with Diethylene Triamine
Pentaacetic Acid (DTPA) to determine their available heavy metal concentrations. The
GBC values established were: 0.04 to 0.90 mg kg−1, 0.70 to 2.50 mg kg−1, 0.10 to
6.30 mg kg−1, 0.30 to 7.90 mg kg−1, 0.29 to 4.50 mg kg−1, and 0.18 to 2.50 mg kg−1 for Cd,
Cr, Cu, Ni, Pb, and Zn, respectively. Soil properties were found to be correlated with the
available heavy metal content, suggesting that the enhanced mobility of heavy metals are
related to anthropic activities.
Descrição
Palavras-chave
available heavy metals mediterranean agricultural soils DTPA geochemical baseline concentrations reference values
Contexto Educativo
Citação
"Sustainability". ISSN 2071-1050. 6 (2014) 9124-9138
Editora
Marc A. Rosen