NickelMaghrebV1, Main, Exploration, bibRecord, 000499

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

Identifieur interne : 000499 ( Main/Exploration ); précédent : 000498; suivant : 000500

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

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

Source :

Environmental technology [ 0959-3330 ] ; 2009.

RBID : Pascal:09-0261172

Descripteurs français

Pascal (Inist)
- Solution aqueuse, Boue résiduaire, Cendre volante, Système binaire, Ion métallique, Eau usée, Composition chimique, Aire surface spécifique, pH, Sorbant, Agitation, Isotherme adsorption, Modélisation, Adsorption, Mélange binaire.
Wicri :
- topic : Eau usée.

English descriptors

KwdEn :
- Adsorption, Adsorption isotherm, Agitation, Aqueous solution, Binary mixture, Binary system, Cadmium (chemistry), Cadmium (isolation & purification), Chemical composition, Fly ash, Hydrogen-Ion Concentration, Metal ion, Modeling, Nickel (chemistry), Nickel (isolation & purification), Sewage (chemistry), Sewage sludge, Sorbent, Specific surface area, Thermodynamics, Waste water, Water Pollutants, Chemical (chemistry), Water Pollutants, Chemical (isolation & purification), pH.
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, ΔH°, ΔS° and ΔG°, 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.

Affiliations:

Tunisie

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<sub>zpc</sub>
). 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, ΔH°, ΔS° and ΔG°, 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

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 :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur le nickel au Maghreb
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