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Provedor de dados:  BABT
País:  Brazil
Título:  Majors soil classes of the metropolitan region of Curitiba (PR), Brazil: II - interaction of Pb with mineral and organic constituents
Autores:  Pires,Ana Christina Duarte
Melo,Vander de Freitas
Motta,Antônio Carlos Vargas
Lima,Valmiqui Costa
Data:  2007-03-01
Ano:  2007
Palavras-chave:  Humic fraction
Fe and Al oxides
Sequential extraction procedure
Specific adsorption
Resumo:  The interaction between heavy metals and soil constituents is one of the most important factors influencing the potential for ground water pollution. To study Pb behavior, samples of soils were incubated with a salt solution containing this metal. The experimental units consisted of plastic bags, partially opened with 0.1 dm³ of soil with three replications. After incubation, samples were subjected to sequential and selective extractions. Lead retention, measured by the maximum adsorption capacity of the soil, was relatively high with values ranging from 6,439 to 22,148 mg kg-1. The sequential and selective extractions showed that Pb adsorption was stable where the metal was found mainly in organic matter, Fe and Al oxides, and residual forms (specific adsorption). The capacity of the soils to retain Pb, thereby increasing the leaching potential of the metal, was in the sequence of: Histosol - Oxisol - Inceptisol.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Instituto de Tecnologia do Paraná - Tecpar
Relação:  10.1590/S1516-89132007000200002
Formato:  text/html
Fonte:  Brazilian Archives of Biology and Technology v.50 n.2 2007
Direitos:  info:eu-repo/semantics/openAccess

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