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. [1] Universidade de São Paulo

     Universidade de São Paulo

     Brasil

     
  2. [2] Universidade de Vigo

     Universidade de Vigo

     Vigo, España

     
• Localización: Spanish Journal of Soil Science: SJSS, ISSN-e 2253-6574, Vol. 4, Nº. 3, 2014, págs. 225-238
• Idioma: inglés
• Títulos paralelos:
  • Plantar árvores e emendar com resíduos incrementa a capacidade dos solos de resíduos orgânicos de mineração pra reter Ni, Pb e Zn
  • Plantar árboles y enmendar con residuos incrementa la capacidad de los suelos de escombrera de mina para retener Ni, Pb y Zn
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• Resumen

  • 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.