NickelMaghrebV1, Main, Exploration, bibRecord, 000412

Retention of nickel from aqueous solutions using iron oxide and manganese oxide coated sand: kinetic and thermodynamic studies

Identifieur interne : 000412 ( Main/Exploration ); précédent : 000411; suivant : 000413

Retention of nickel from aqueous solutions using iron oxide and manganese oxide coated sand: kinetic and thermodynamic studies

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

Source :

Environmental technology [ 0959-3330 ] ; 2010.

RBID : Pascal:11-0040300

Descripteurs français

Pascal (Inist)
- Rétention, Solution aqueuse, Cinétique, Condition opératoire, pH, Isotherme adsorption, Coefficient corrélation, Isotherme Langmuir, Modélisation, Sorption, Sorbant, Paramètre thermodynamique, Adsorption, Ordre 1, Ordre 2, Diffusion, Modèle cinétique, Captation, Désorption.

English descriptors

KwdEn :
- Absorption, Adsorption, Adsorption isotherm, Aqueous solution, Computer Simulation, Correlation coefficient, Desorption, Diffusion, Ferric Compounds (chemistry), First order, Kinetic model, Kinetics, Langmuir isotherm, Manganese Compounds (chemistry), Modeling, Models, Chemical, Nickel (chemistry), Nickel (isolation & purification), Operating conditions, Oxides (chemistry), Retention, Second order, Soil (chemistry), Sorbent, Sorption, Thermodynamic parameter, Thermodynamics, Ultrafiltration (methods), Uptake, Water Pollutants, Chemical (chemistry), Water Pollutants, Chemical (isolation & purification), Water Purification (methods), pH.
MESH :
- chemical , chemistry : Ferric Compounds, Manganese Compounds, Nickel, Oxides, Soil, Water Pollutants, Chemical.
- chemical , isolation & purification : Nickel, Water Pollutants, Chemical.
- methods : Ultrafiltration, Water Purification.
- Absorption, Computer Simulation, Kinetics, Models, Chemical, Thermodynamics.

Abstract

In this study, the removal of nickel ions from aqueous solutions using iron oxide and manganese oxide coated sand (ICS and MCS) under different experimental conditions was investigated. The effect of metal concentration, contact time, solution pH and temperature on the amount of Ni(II) sorbed was studied and discussed. Langmuir and Freundlich isotherm constants and correlation coefficients for the present systems at different temperatures were calculated and compared. The equilibrium process was well described by the Langmuir isotherm model: the maximum sorption capacities (at 29 K) were 2.73 mg Ni/g and 3.33 mg Ni/g of sorbent for ICS and MCS, respectively. Isotherms were also used to evaluate the thermodynamic parameters (ΔG°, ΔH°, ΔS°) of adsorption. The sorption kinetics were tested for the pseudo-first-order, pseudo-second-order and intra-particle diffusion models. Good correlation coefficients were obtained for the pseudo-second-order kinetic model, showing that the nickel uptake process followed the pseudo-second-order rate expression.

Affiliations:

Tunisie

Le document en format XML

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<term>Computer Simulation</term>
<term>Correlation coefficient</term>
<term>Desorption</term>
<term>Diffusion</term>
<term>Ferric Compounds (chemistry)</term>
<term>First order</term>
<term>Kinetic model</term>
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<term>Nickel (isolation & purification)</term>
<term>Operating conditions</term>
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<term>Retention</term>
<term>Second order</term>
<term>Soil (chemistry)</term>
<term>Sorbent</term>
<term>Sorption</term>
<term>Thermodynamic parameter</term>
<term>Thermodynamics</term>
<term>Ultrafiltration (methods)</term>
<term>Uptake</term>
<term>Water Pollutants, Chemical (chemistry)</term>
<term>Water Pollutants, Chemical (isolation & purification)</term>
<term>Water Purification (methods)</term>
<term>pH</term>
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<term>Manganese Compounds</term>
<term>Nickel</term>
<term>Oxides</term>
<term>Soil</term>
<term>Water Pollutants, Chemical</term>
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<term>Water Purification</term>
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<term>Computer Simulation</term>
<term>Kinetics</term>
<term>Models, Chemical</term>
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<term>Paramètre thermodynamique</term>
<term>Adsorption</term>
<term>Ordre 1</term>
<term>Ordre 2</term>
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<front><div type="abstract" xml:lang="en">In this study, the removal of nickel ions from aqueous solutions using iron oxide and manganese oxide coated sand (ICS and MCS) under different experimental conditions was investigated. The effect of metal concentration, contact time, solution pH and temperature on the amount of Ni(II) sorbed was studied and discussed. Langmuir and Freundlich isotherm constants and correlation coefficients for the present systems at different temperatures were calculated and compared. The equilibrium process was well described by the Langmuir isotherm model: the maximum sorption capacities (at 29 K) were 2.73 mg Ni/g and 3.33 mg Ni/g of sorbent for ICS and MCS, respectively. Isotherms were also used to evaluate the thermodynamic parameters (ΔG°, ΔH°, ΔS°) of adsorption. The sorption kinetics were tested for the pseudo-first-order, pseudo-second-order and intra-particle diffusion models. Good correlation coefficients were obtained for the pseudo-second-order kinetic model, showing that the nickel uptake process followed the pseudo-second-order rate expression.</div>
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Serveur d'exploration sur le nickel au Maghreb

Retention of nickel from aqueous solutions using iron oxide and manganese oxide coated sand: kinetic and thermodynamic studies

Retention of nickel from aqueous solutions using iron oxide and manganese oxide coated sand: kinetic and thermodynamic studies

Source :

Descripteurs français

English descriptors

Abstract

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

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Pour mettre un lien sur cette page dans le réseau Wicri

	Serveur d'exploration sur le nickel au Maghreb
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