Title: Concentrations of heavy metals in plants grown on polluted mining soils (Loma Charra mine, Spain)
Authors: A. Garcia-Sanchez, H.M. Anawar, A. Moyano, E. Alvarez-Ayuso, C. Munez
Addresses: Department of Environmental Geochemistry, IRNA-CSIC, Salamanca, Spain. ' Department of Environmental Geochemistry, IRNA-CSIC, Salamanca, Spain. ' EU Ingenierias Agrarias, Universidad de Valladolid, Campus de Soria, Spain. ' Instituto de Ciencias de la Tierra 'Jaume Almera' CSIC, Barcelona, Spain. ' EU Ingenierias Agrarias, Universidad de Castilla-La Mancha, Ciudad Real, Spain
Abstract: Evaluation of heavy metal accumulation in plants is of environmental importance due to its toxicity effects in humans and other biota. Soils and plants were sampled in a polluted site around a Pb-Zn(Cd) mine. Total metal contents in the soil indicate a gross degree of pollution in relation to background levels. Soil Cd shows high mobility and availability and consequent high environmental risk. The range of cadmium content in plants (<0.05–3.6 mg/kg) is relatively low, although higher than the reference plant content, and none of the sampled plant species hyperaccumulated Cd, Pb and Zn. Metal concentration in plants exceeds the MLRL (maximum level recommended for livestock), and the barley crop exceeds the EU limit, which indicates a risk of food chain contamination in the studied area.
Keywords: cadmium; food chain; lead; plant uptake; zinc; heavy metals; environmental pollution; mining soils; soil contamination; plants; Spain.
International Journal of Environment and Pollution, 2008 Vol.33 No.2/3, pp.248 - 259
Published online: 11 Jul 2008 *Full-text access for editors Access for subscribers Purchase this article Comment on this article