Removal of lead from aqueous solution by an efficient low cost biosorbent / Sultan Alam in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 49, N° 2 (03-04/2012)

[article]  inTENSIDE, SURFACTANTS, DETERGENTS > Vol. 49, N° 2 (03-04/2012) . - p. 100-106 Titre : Removal of lead from aqueous solution by an efficient low cost biosorbent Type de document : texte imprimé Auteurs : Sultan Alam, Auteur ; Azmat Ullah, Auteur ; Mashooq Khan, Auteur ; Mohammad Sadiq, Auteur ; Zahid Hussain, Auteur ; Noorul Amin, Auteur Année de publication : 2012 Article en page(s) : p. 100-106 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Adsorption Biosorbant Plomb Thermodynamique Index. décimale : 668.1 Agents tensioactifs : savons, détergents Résumé : Removal of Pb(II) ion from aqueous solution on modified sawdust obtained from Morus alba was investigated. The sample was characterized by BET surface area, EDX, FTIR and Zeta potential technique. The surface contains carbonyl and hydroxyl functional groups which act as binding sites for Pb(II) ion. Adsorption kinetics of Pb(II) on sawdust was tested by pseudo first order, Elovich and parabolic diffusion kinetic equations. The adsorption data were found to fit to Freundlich, Langmuir and Tempkin isotherms. The rate of adsorption was high at high temperature. Thermodynamic parameters like DH, DS and DG were calculated from the kinetic data. The positive values of DS reflect some structural exchange among the active site of the adsorbent and metal ion. The negative values of Gibbs free energy (DG) show the spontaneous nature of the process. Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=13895 [article]

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