NickelMaghrebV1, PubMed, Checkpoint, bibRecord, 000098

Removal of nickel and cadmium from aqueous solutions by sewage sludge ash: study in single and binary systems.

Identifieur interne : 000098 ( PubMed/Checkpoint ); précédent : 000097; suivant : 000099

Removal of nickel and cadmium from aqueous solutions by sewage sludge ash: study in single and binary systems.

Auteurs : Z. Elouear [Tunisie] ; J. Bouzid ; N. Boujelben

Source :

Environmental technology [ 0959-3330 ] ; 2009.

RBID : pubmed:19603703

English descriptors

KwdEn :
- Adsorption, Cadmium (chemistry), Cadmium (isolation & purification), Hydrogen-Ion Concentration, Nickel (chemistry), Nickel (isolation & purification), Sewage (chemistry), Thermodynamics, Water Pollutants, Chemical (chemistry), Water Pollutants, Chemical (isolation & purification).
MESH :
- chemical , chemistry : Cadmium, Nickel, Sewage, Water Pollutants, Chemical.
- chemical , isolation & purification : Cadmium, Nickel, Water Pollutants, Chemical.
- Adsorption, Hydrogen-Ion Concentration, Thermodynamics.

Abstract

Sewage sludge ash can potentially be used for the removal of metal ions from wastewater because its chemical composition is similar to that of fly ash. The aim of this work was to investigate the adsorptive characteristics of this material, including specific surface area and pH of zero point of charge (pH zpc), and to assess the possibility of removing nickel and cadmium from aqueous solutions by this sorbent. The effects of agitation time, pH, initial metal ion concentration and temperature on the removal of these metals were studied. In order to study the sorption isotherm, two equilibrium models, the Langmuir and Freundlich isotherms, were analysed. The effect of solution pH on the adsorption on to sewage sludge ash was studied in the pH range from 2 to 8. The adsorption was endothermic and the computation of the parameters, delta H0, delta S0 and delta G0, indicated that the interactions were thermodynamically favourable. Experiments with Ni and Cd adsorption measured together showed that Cd severely interfered with Ni adsorption to sewage sludge ash and vice versa.

DOI: 10.1080/09593330902824940
PubMed: 19603703

Affiliations:

Tunisie

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pubmed:19603703

Le document en format XML

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<front><div type="abstract" xml:lang="en">Sewage sludge ash can potentially be used for the removal of metal ions from wastewater because its chemical composition is similar to that of fly ash. The aim of this work was to investigate the adsorptive characteristics of this material, including specific surface area and pH of zero point of charge (pH zpc), and to assess the possibility of removing nickel and cadmium from aqueous solutions by this sorbent. The effects of agitation time, pH, initial metal ion concentration and temperature on the removal of these metals were studied. In order to study the sorption isotherm, two equilibrium models, the Langmuir and Freundlich isotherms, were analysed. The effect of solution pH on the adsorption on to sewage sludge ash was studied in the pH range from 2 to 8. The adsorption was endothermic and the computation of the parameters, delta H0, delta S0 and delta G0, indicated that the interactions were thermodynamically favourable. Experiments with Ni and Cd adsorption measured together showed that Cd severely interfered with Ni adsorption to sewage sludge ash and vice versa.</div>
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	Serveur d'exploration sur le nickel au Maghreb
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Removal of nickel and cadmium from aqueous solutions by sewage sludge ash: study in single and binary systems.

Removal of nickel and cadmium from aqueous solutions by sewage sludge ash: study in single and binary systems.

Source :

English descriptors

Abstract

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Links to Exploration step

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