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)  

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