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Desalination and Water Treatment Volume 56, 2015 - Issue 10
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Articles

Biosorption of zinc from aqueous solution by dried activated sludge biomass

A. RezguiFaculté des Sciences de Monastir, Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (CHPNR), Avenue de l’Environnement, 5019Monastir, Tunisia, Tel. +216 73 500 275; Fax: +216 73 500 278Correspondence[email protected]
,
Y. HannachiFaculté des Sciences de Monastir, Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (CHPNR), Avenue de l’Environnement, 5019Monastir, Tunisia, Tel. +216 73 500 275; Fax: +216 73 500 278Correspondence[email protected]
,
E. GuibalEcole des Mines d’Alès, Centre des Matériaux des Mines d’Alès, C2MA/MPA/BCI, 6, Avenue de Clavières, F-30319Alès Cedex, France, Tel. +33 4 66 78 27 34; Fax: +33 4 66 78 27 01Correspondence[email protected]
&
T. BoubakerFaculté des Sciences de Monastir, Laboratoire de Chimie Hétérocyclique, Produits Naturels et Réactivité (CHPNR), Avenue de l’Environnement, 5019Monastir, Tunisia, Tel. +216 73 500 275; Fax: +216 73 500 278Correspondence[email protected]
Pages 2699-2705 | Received 12 Nov 2013, Accepted 30 Oct 2014, Published online: 19 Jan 2015
 
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Abstract

The biosorption potential of Zn(II) from aqueous solutions using activated sludge biomass was investigated. Optimum biosorption conditions were determined with respect to pH, adsorbent dose, contact time and temperature. Langmuir, Freundlich and Dubinin–Radushkevich (D–R) isotherm models were applied to the equilibrium data. The maximum Zn(II) sorption capacity of activated sludge was found to be 76.92 mg g−1 at pH 6, biomass concentration 2 g L−1, contact time 30 min and temperature 20°C. The calculated mean biosorption energy (9.82 kJmol−1) using D–R model indicated that the biosorption of Zn(II) on the biomass was induced by chemical ion exchange.

Notes

Presented at the 4th Maghreb Conference on Desalination and Water Treatment (CMTDE 2013) 15–18 December 2013, Hammamet, Tunisia

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