Data/hora: 03/06/2024 07:27:17

Provedor de dados: | 63
País: | Brazil
Título: | Nickel adsorption by soils in relation to pH, organic matter, and iron oxides
Autores: | Mellis,Estêvão Vicari; Cruz,Mara Cristina Pessôa da; Casagrande,José Carlos.
Data: | 2004-04-01
Ano: | 2004
Palavras-chave: | Ni adsorption; Tropical soils.
Resumo: | There is little information on nickel adsorption by Brazilian soils. The objective of this experiment was to determine the effect of pH, organic matter, and iron oxides on nickel adsorption by three soils: a clayey Anionic "Rhodic" Acrudox, a sandy clay loam Anionic "Xanthic" Acrudox, and a clayey Rhodic Hapludalf. Soil samples were collected from the 0-0.2 m layer and treated to eliminate organic matter and iron oxides. The nickel adsorption was evaluated in the original samples and in those treated to remove organic matter and to remove both, organic matter and iron oxides, using 2 g soil + 20 mL of 0.01 mol L-1 CaCl2 solution containing 5 mg L-1 Ni, pH varying from 3.5 to 7.5. The nickel adsorption decreased with the elimination of organic matter. For the samples without organic matter and iron oxides, adsorption decreased only in the Anionic "Rhodic" Acrudox. The pH was the main factor involved in nickel adsorption variation, and for soil samples without organic matter and iron oxides, the maximum adsorption occurred at higher pH values.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200011
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162004000200011
Formato: | text/html
Fonte: | Scientia Agricola  v.61 n.2 2004
Fonte: | info:eu-repo/semantics/openAccess