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Artigo Acesso aberto Produção Nacional Revisado por pares
BIBTEX RIS

Removal of lead ions from aqueous solution by retorted shale

2007; Elsevier BV; Volume: 56; Issue: 3 Linguagem: Inglês

10.1016/j.seppur.2007.01.029

ISSN

1873-3794

Autores

Patrícia Mendonça Pimentel, G. González, Maria Celeste Nunes de Melo, Dulce Maria de Araújo Melo, C SILVAJR, A. L. C. Assunção,

Tópico(s)

Electrostatics and Colloid Interactions

Resumo

The equilibrium and kinetic properties of Pb2+ ion adsorption by retorted shale (RS) have been investigated during a series of batch adsorption experiments. The effects of pH, contact time and adsorbate initial concentration were evaluated. The pseudo-second-order model was used to predict the rate constants of adsorption system. Langmuir and Freundlich models were used to fit the equilibrium data, which showed that Langmuir best-fitted these data. Thermodynamic parameters of adsorption indicate spontaneous and endothermic nature of the process.

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