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Adsorption property of cesium onto modified macroporous silica – calix [4] arene - crown based supramolecular recognition materials / Anyun Zhang in Industrial & engineering chemistry research, Vol. 51 N° 17 (Mai 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6196-6204 Titre : Adsorption property of cesium onto modified macroporous silica – calix [4] arene - crown based supramolecular recognition materials Type de document : texte imprimé Auteurs : Anyun Zhang, Auteur ; Zhifang Chai, Auteur Année de publication : 2012 Article en page(s) : pp. 6196-6204 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Macroporosity  Adsorption Résumé : The adsorption behavior of Cs(I), one of the heat generators, in HNO3 medium was investigated at 298 K. The impact of U(VI), some typical elements, and temperature on the adsorption of Cs(I) was evaluated. It was performed by macroporous silica-based 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) impregnated supramolecular recognition materials (Calix[4] + M)/SiO2–P. They were modified with tri-n-butyl phosphate (TBP), octanol (Oct), and methyloctyl-2-dimethylbutanemide (MODB). The excellent adsorption ability and high selectivity of (Calix[4] + M)/SiO2–P for Cs(I) except Rb(I) and U(VI) were confirmed. The adsorption ability of Cs(I) onto the modified supramolecular recognition materials was (Calix[4] + Oct)/SiO2–P > (Calix[4] + TBP)/SiO2–P > (Calix[4] + MODB)/SiO2–P. The chromatographic separation of Cs(I) from a 4.0 M HNO3 solution containing La(III), Sr(II), Ru(III), Cs(I), Rb(I), U(VI), Mo(VI), Zr(IV), Gd(III), and Pd(II) was carried out with a (Calix[4] + TBP)/SiO2–P packed column. Cs(I) was eluted effectively with water. The possibility and feasibility of effective partitioning of Cs(I) from highly active liquid waste by the (Calix[4] + M)/SiO2–P materials was evaluated. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25862979 [article] Adsorption property of cesium onto modified macroporous silica – calix [4] arene - crown based supramolecular recognition materials [texte imprimé] / Anyun Zhang, Auteur ; Zhifang Chai, Auteur . - 2012 . - pp. 6196-6204. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 17 (Mai 2012) . - pp. 6196-6204 Mots-clés : Macroporosity  Adsorption Résumé : The adsorption behavior of Cs(I), one of the heat generators, in HNO3 medium was investigated at 298 K. The impact of U(VI), some typical elements, and temperature on the adsorption of Cs(I) was evaluated. It was performed by macroporous silica-based 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) impregnated supramolecular recognition materials (Calix[4] + M)/SiO2–P. They were modified with tri-n-butyl phosphate (TBP), octanol (Oct), and methyloctyl-2-dimethylbutanemide (MODB). The excellent adsorption ability and high selectivity of (Calix[4] + M)/SiO2–P for Cs(I) except Rb(I) and U(VI) were confirmed. The adsorption ability of Cs(I) onto the modified supramolecular recognition materials was (Calix[4] + Oct)/SiO2–P > (Calix[4] + TBP)/SiO2–P > (Calix[4] + MODB)/SiO2–P. The chromatographic separation of Cs(I) from a 4.0 M HNO3 solution containing La(III), Sr(II), Ru(III), Cs(I), Rb(I), U(VI), Mo(VI), Zr(IV), Gd(III), and Pd(II) was carried out with a (Calix[4] + TBP)/SiO2–P packed column. Cs(I) was eluted effectively with water. The possibility and feasibility of effective partitioning of Cs(I) from highly active liquid waste by the (Calix[4] + M)/SiO2–P materials was evaluated. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=25862979

Synthesis of a novel macroporous silica-calix[4] arene-crown polymeric composite and Its adsorption for alkali metals and alkaline-earth metals / Anyun Zhang in Industrial & engineering chemistry research, Vol. 49 N° 5 (Mars 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2047–2054 Titre : Synthesis of a novel macroporous silica-calix[4] arene-crown polymeric composite and Its adsorption for alkali metals and alkaline-earth metals Type de document : texte imprimé Auteurs : Anyun Zhang, Auteur ; Qihui Hu, Auteur ; Zhifang Chai, Auteur Année de publication : 2010 Article en page(s) : pp. 2047–2054 Note générale : Industrial Chemistry Langues : Anglais (eng) Mots-clés : Macroporous;  Calix[4];  Polymeic;  Adsorption Résumé : A macroporous silica-based 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) supramolecular recognition polymeric composite, (Calix[4] + MODB)/SiO2−P, was synthesized. The synthesis was performed by impregnation and immobilization of Calix[4]arene-R14 and methyloctyl-2-dimethylbutanemide (MODB) molecules in the pores of a macroporous SiO2−P polymeric particle support with a mean diameter of 50 μm. MODB was used to modify the Calix[4]arene-R14 through intermolecular interaction force. The static-state adsorption of some typical alkali metals and alkaline-earth metals such as Na(I), K(I), Cs(I), Rb(I), Sr(II), and Ba(II) onto (Calix[4] + MODB)/SiO2−P was investigated. The effects of contact time, HNO3 concentration in the range of 0.3−7.0 M, and temperature on the adsorption were examined. (Calix[4] + MODB)/SiO2−P exhibited strong adsorption ability and excellent selectivity for Cs(I) over all tested elements, which showed weak or almost no adsorption except for Rb(I). The adsorption onto (Calix[4] + MODB)/SiO2−P of the tested metals in HNO3 medium was exothermic. The thermodynamic parameters for the adsorptions of Cs(I) and Rb(I) were determined. It was found that, in 3.0 M HNO3, application of the (Calix[4] + MODB)/SiO2−P polymeric composite in the partitioning of Cs(I), one of the heat generators, from highly active liquid waste in the SPEC (strontium/cesium partitioning from HLW by extraction chromatography) process is promising. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901622y [article] Synthesis of a novel macroporous silica-calix[4] arene-crown polymeric composite and Its adsorption for alkali metals and alkaline-earth metals [texte imprimé] / Anyun Zhang, Auteur ; Qihui Hu, Auteur ; Zhifang Chai, Auteur . - 2010 . - pp. 2047–2054. Industrial Chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 5 (Mars 2010) . - pp. 2047–2054 Mots-clés : Macroporous;  Calix[4];  Polymeic;  Adsorption Résumé : A macroporous silica-based 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (Calix[4]arene-R14) supramolecular recognition polymeric composite, (Calix[4] + MODB)/SiO2−P, was synthesized. The synthesis was performed by impregnation and immobilization of Calix[4]arene-R14 and methyloctyl-2-dimethylbutanemide (MODB) molecules in the pores of a macroporous SiO2−P polymeric particle support with a mean diameter of 50 μm. MODB was used to modify the Calix[4]arene-R14 through intermolecular interaction force. The static-state adsorption of some typical alkali metals and alkaline-earth metals such as Na(I), K(I), Cs(I), Rb(I), Sr(II), and Ba(II) onto (Calix[4] + MODB)/SiO2−P was investigated. The effects of contact time, HNO3 concentration in the range of 0.3−7.0 M, and temperature on the adsorption were examined. (Calix[4] + MODB)/SiO2−P exhibited strong adsorption ability and excellent selectivity for Cs(I) over all tested elements, which showed weak or almost no adsorption except for Rb(I). The adsorption onto (Calix[4] + MODB)/SiO2−P of the tested metals in HNO3 medium was exothermic. The thermodynamic parameters for the adsorptions of Cs(I) and Rb(I) were determined. It was found that, in 3.0 M HNO3, application of the (Calix[4] + MODB)/SiO2−P polymeric composite in the partitioning of Cs(I), one of the heat generators, from highly active liquid waste in the SPEC (strontium/cesium partitioning from HLW by extraction chromatography) process is promising. Note de contenu : Bibliogr. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901622y