Adsorption of nickel from aqueous solution by the use of low-cost adsorbents
Identifieur interne : 000522 ( Main/Exploration ); précédent : 000521; suivant : 000523Adsorption of nickel from aqueous solution by the use of low-cost adsorbents
Auteurs : Yasser Hannachi [Russie, Tunisie] ; N. A. Shapovalov [Russie] ; Aymen Hannachi [Tunisie]Source :
- Desalination and water treatment : (Print) [ 1944-3994 ] ; 2009.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Phosphate.
English descriptors
- KwdEn :
Abstract
The removal of Ni(II) from aqueous solution by different adsorbents was investigated. Calcined phosphate, red mud, clarified sludge (a steel industry waste material) were used for the adsorption studies. The influence of pH, contact time, initial metal concentration, adsorbent nature and concentration on the selectivity and sensitivity of the removal process was investigated. The adsorption process was found to follow a first-order rate mechanism and rate constant was evaluated at 30°C. Langmuir and Freundlich adsorption isotherms fit well in the experimental data and their constants were evaluated. The thermodynamic equilibrium constant and the Gibbs free energy were calculated for each system. The adsorption capacity (qmax) calculated from Langmuir isotherm and the values of Gibbs free energy obtained showed that Calcined phosphate has the largest capacity and affinity for the removal of Ni(II) compared to the other adsorbents used in the study.
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A." last="Shapovalov">N. A. Shapovalov</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Belgorod State Technological University, Department of Colloid Chemistry</s1><s2>308012 Belgorod</s2><s3>RUS</s3><sZ>1 aut.</sZ><sZ>2 aut.</sZ></inist:fA14><country>Russie</country><wicri:noRegion>308012 Belgorod</wicri:noRegion></affiliation></author><author><name sortKey="Hannachi, Aymen" sort="Hannachi, Aymen" uniqKey="Hannachi A" first="Aymen" last="Hannachi">Aymen Hannachi</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>El Manar Preparatory Institute for Engineering Studies, Department of physic Chemistry 2092 El Manar II</s1><s3>TUN</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ></inist:fA14><country>Tunisie</country><wicri:noRegion>El Manar Preparatory Institute for Engineering Studies, Department of physic Chemistry 2092 El Manar II</wicri:noRegion></affiliation></author></analytic><series><title level="j" type="main">Desalination and water treatment : (Print)</title><title level="j" type="abbreviated">Desalination water treat. : (Print)</title><idno type="ISSN">1944-3994</idno><imprint><date when="2009">2009</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Desalination and water treatment : (Print)</title><title level="j" type="abbreviated">Desalination water treat. : (Print)</title><idno type="ISSN">1944-3994</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adsorption</term><term>Adsorption capacity</term><term>Adsorption isotherm</term><term>Equilibrium constant</term><term>Gibbs free energy</term><term>Kinetics</term><term>Phosphates</term><term>Red sludge</term><term>Sensitivity analysis</term><term>Thermodynamic equilibrium</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Adsorption</term><term>Phosphate</term><term>Boue rouge</term><term>Analyse sensibilité</term><term>Cinétique</term><term>Isotherme adsorption</term><term>Equilibre thermodynamique</term><term>Constante équilibre</term><term>Energie libre Gibbs</term><term>Capacité adsorption</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Phosphate</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The removal of Ni(II) from aqueous solution by different adsorbents was investigated. Calcined phosphate, red mud, clarified sludge (a steel industry waste material) were used for the adsorption studies. The influence of pH, contact time, initial metal concentration, adsorbent nature and concentration on the selectivity and sensitivity of the removal process was investigated. The adsorption process was found to follow a first-order rate mechanism and rate constant was evaluated at 30°C. Langmuir and Freundlich adsorption isotherms fit well in the experimental data and their constants were evaluated. The thermodynamic equilibrium constant and the Gibbs free energy were calculated for each system. The adsorption capacity (q<sub>max</sub>) calculated from Langmuir isotherm and the values of Gibbs free energy obtained showed that Calcined phosphate has the largest capacity and affinity for the removal of Ni(II) compared to the other adsorbents used in the study.</div></front></TEI><affiliations><list><country><li>Russie</li><li>Tunisie</li></country></list><tree><country name="Russie"><noRegion><name sortKey="Hannachi, Yasser" sort="Hannachi, Yasser" uniqKey="Hannachi Y" first="Yasser" last="Hannachi">Yasser Hannachi</name></noRegion><name sortKey="Shapovalov, N A" sort="Shapovalov, N A" uniqKey="Shapovalov N" first="N. A." last="Shapovalov">N. A. Shapovalov</name></country><country name="Tunisie"><noRegion><name sortKey="Hannachi, Yasser" sort="Hannachi, Yasser" uniqKey="Hannachi Y" first="Yasser" last="Hannachi">Yasser Hannachi</name></noRegion><name sortKey="Hannachi, Aymen" sort="Hannachi, Aymen" uniqKey="Hannachi A" first="Aymen" last="Hannachi">Aymen Hannachi</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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