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Removal of zinc, copper and lead by natural zeolite - a comparison of adsorption isotherms (CROSBI ID 105069)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Perić, Jelena ; Trgo, Marina ; Vukojević Medvidović, Nediljka Removal of zinc, copper and lead by natural zeolite - a comparison of adsorption isotherms // Water research, 38 (2004), 7; 1893-1899-x

Podaci o odgovornosti

Perić, Jelena ; Trgo, Marina ; Vukojević Medvidović, Nediljka

engleski

Removal of zinc, copper and lead by natural zeolite - a comparison of adsorption isotherms

An uptake of zinc (Zn), copper (Cu), and lead (Pb) from aqueous solutions by ion exchange on natural zeolitic tuff has been studied. The Croatian zeolite clinoptilolite from the Donje Jesenje deposit has been used as a natural ion exchanger. The efficiency of removal is higher for Pb and Cu than for Zn ions. Measured concentrations of Si in the liquid phase identify the detachment of the aluminosilicate structure during ion exchange in the presence of H^+ and OH^- ions. The adsorption isotherm equations ; Langmuir-Freundlich, Redlich-Petersen, Toth, Dubinin-Radushkevich, modified Dubinin-Radushkevich, and Lineweawer-Burk were derived from the basic empirical equations, and used for calculation of ion exchange parameters. The best fitting of experimental results to the proposed isotherms was observed in models that assume that ionic species bind first at energetically most favorable sites, with multi-layer adsorption taking place subsequently

zinc; copper; lead; natural zeolite; asorption models

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Podaci o izdanju

38 (7)

2004.

1893-1899-x

objavljeno

0043-1354

Povezanost rada

Kemijsko inženjerstvo

Indeksiranost