title: Heavy metals fractionation and desorption in pine bark amended mine soils.
abstract: The European Community Bureau of Reference method (BCR) was used for evaluating the effects of pine bark amendment (0, 24 and 48 g kg-1) and ageing (1 and 30 days) on Cd, Cu, Ni, Pb and Zn fractionation, on samples from an acid mine soil. In addition, the stirred flow chamber technique was applied for analyzing heavy metals desorption from the unamended and pine bark amended mine soil. When the unamended soil were not subjected to ageing, the added heavy metals were mainly accumulated as soluble fraction (>90% for Cd, Ni and Zn; 71% for Cu; and 45% for Pb). Pine bark amendment and ageing had little effect on Cd, Ni and Zn fractionation, whereas important changes were detected for Cu and Pb in response to both pine bark amendment and ageing (decrease in the soluble fractions, and increase in less mobile fractions). Desorption experiments showed that both pine bark amendment and ageing decreased heavy metals release from the mine soil. The results of this study indicate that pine bark amendment could be used to increase heavy metals retention (especially in the case of Cu and Pb) in acid mine soils, thus reducing the risks of metal transfer to uncontaminated environmental zones.
authors.affiliation: Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain. Electronic address: davidfc@uvigo.es.
authors.forename: David
authors.initials: D
authors.lastname: Fernández-Calviño
authors.affiliation: Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
authors.forename: Laura
authors.initials: L
authors.lastname: Cutillas-Barreiro
authors.affiliation: Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
authors.forename: Remigio
authors.initials: R
authors.lastname: Paradelo-Núñez
authors.affiliation: Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Nóvoa-Muñoz
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, Campus Univ. Lugo, Universidade de Santiago de Compostela, Galicia, Spain.
authors.forename: María J
authors.initials: MJ
authors.lastname: Fernández-Sanjurjo
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, Campus Univ. Lugo, Universidade de Santiago de Compostela, Galicia, Spain.
authors.forename: Esperanza
authors.initials: E
authors.lastname: Álvarez-Rodríguez
authors.affiliation: Department of Soil Science and Agricultural Chemistry, Engineering Polytechnic School, Campus Univ. Lugo, Universidade de Santiago de Compostela, Galicia, Spain.
authors.forename: Avelino
authors.initials: A
authors.lastname: Núñez-Delgado
authors.affiliation: Department of Plant Biology and Soil Science, Section of Soil Science, University of Vigo, 32004, Ourense, Spain.
authors.forename: Manuel
authors.initials: M
authors.lastname: Arias-Estévez
mesh_terms: D005591:Chemical Fractionation; D019216:Metals, Heavy; D028223:Pinus; D012987:Soil; D012989:Soil Pollutants
chemical_list: D019216:Metals, Heavy; D012987:Soil; D012989:Soil Pollutants
keywords: Ageing; BCR procedure; Desorption; Heavy metals; Mine dump; Pine bark