Kinetic and equilibrium profiles of adsorptive recovery of thorium (IV) from aqueous solutions using poly (methacrylic acid) grafted cellulose / bentonite superabsorbent composite / T. S. Anirudhan in Industrial & engineering chemistry research, Vol. 51 N° 13 (Avril 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4825–4836 Titre : Kinetic and equilibrium profiles of adsorptive recovery of thorium (IV) from aqueous solutions using poly (methacrylic acid) grafted cellulose / bentonite superabsorbent composite Type de document : texte imprimé Auteurs : T. S. Anirudhan, Auteur ; Padmajan S. Suchithra, Auteur ; P. Senan, Auteur Année de publication : 2012 Article en page(s) : pp. 4825–4836 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Kinetic Aqueous solutions Résumé : The removal and recovery of thorium(IV) [Th(IV)] ions from aqueous solutions were investigated using poly(methacrylic acid)-grafted-cellulose/bentonite (PMAA-g-Cell/Bent) superabsorbent composite through batch adsorption experiments. Surface characterizations of the adsorbent were investigated. The adsorbent showed significant Th(IV) removal (>99.7%) at pH 5.0. The influence of coexisting ions on the adsorption of Th(IV) was studied. Mass transfer aspects of Th(IV) adsorption onto PMAA-g-Cell/Bent were evaluated. The Sips adsorption isotherm described the adsorption data very well, with a maximum adsorption capacity of 188.1 mg/g. Thermodynamic parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°), standard free energy (ΔG°), activation energy (Ea), isosteric enthalpy (ΔHx), and entropy (ΔSx) were calculated. Tests with a seawater sample revealed the effectiveness of PMAA-g-Cell/Bent for adsorptive removal of Th(IV) from aqueous solutions. Desorption experiments showed that 0.1 M HNO3 can effectively desorb adsorbed thorium ions with a contact time of 3 h. A single stage batch reactor is designed for commercial applicability of the adsorbent. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202538q [article] Kinetic and equilibrium profiles of adsorptive recovery of thorium (IV) from aqueous solutions using poly (methacrylic acid) grafted cellulose / bentonite superabsorbent composite [texte imprimé] / T. S. Anirudhan, Auteur ; Padmajan S. Suchithra, Auteur ; P. Senan, Auteur . - 2012 . - pp. 4825–4836. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 13 (Avril 2012) . - pp. 4825–4836 Mots-clés : Kinetic Aqueous solutions Résumé : The removal and recovery of thorium(IV) [Th(IV)] ions from aqueous solutions were investigated using poly(methacrylic acid)-grafted-cellulose/bentonite (PMAA-g-Cell/Bent) superabsorbent composite through batch adsorption experiments. Surface characterizations of the adsorbent were investigated. The adsorbent showed significant Th(IV) removal (>99.7%) at pH 5.0. The influence of coexisting ions on the adsorption of Th(IV) was studied. Mass transfer aspects of Th(IV) adsorption onto PMAA-g-Cell/Bent were evaluated. The Sips adsorption isotherm described the adsorption data very well, with a maximum adsorption capacity of 188.1 mg/g. Thermodynamic parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°), standard free energy (ΔG°), activation energy (Ea), isosteric enthalpy (ΔHx), and entropy (ΔSx) were calculated. Tests with a seawater sample revealed the effectiveness of PMAA-g-Cell/Bent for adsorptive removal of Th(IV) from aqueous solutions. Desorption experiments showed that 0.1 M HNO3 can effectively desorb adsorbed thorium ions with a contact time of 3 h. A single stage batch reactor is designed for commercial applicability of the adsorbent. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie202538q

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