Planting trees and amending with waste increases the capacity of mine tailings soils to retain Ni, Pb and Zn
- Verónica Asensio Fandiño 1
- Flora A. Vega 2
- Rubén Forján 2
- Emma F. Covelo 2
- 1 Universidade de São Paulo, Centro de Energia Nuclear na Agricultur
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2
Universidade de Vigo
info
ISSN: 2253-6574
Argitalpen urtea: 2014
Alea: 4
Zenbakia: 3
Orrialdeak: 225-238
Mota: Artikulua
Beste argitalpen batzuk: Spanish Journal of Soil Science: SJSS
Laburpena
The sorption capacity for Ni, Pb and Zn of mine tailings soil with and without reclamation treatment (tree planting and waste amendment) was evaluated using the batch adsorption technique. It is important to determine the capacity of waste-amended soils to retain Ni, Pb and Zn, as the sludges used usually have high concentrations of these metals. The results obtained in the present study showed that the untreated mine tailings soil had a low capacity for Ni, Pb and Zn retention. The sorption capacity for Pb increased significantly in all of the treated soils, without any significant differences between them. The treatment that most increased the sorption capacity for Ni and Zn was planting with trees and amending with waste simultaneously, as this increased the concentration of both organic and inorganic carbon, exchangeable calcium, soil pH and effective cation exchange capacity.