Artículos de revistas
Adsorption Of Transition Metal Chlorides By Silica With Grafted 1-n-propyl-3-methylimidazolium Chloride
Registro en:
Adsorption Of Transition Metal Chlorides By Silica With Grafted 1-n-propyl-3-methylimidazolium Chloride. Soc Brasileira Quimica, v. 26, p. 1160-1170 JUN-2015.
0103-5053
WOS:000356182100010
10.5935/0103-5053.20150080
Autor
Panteleimonov
Anton V.; Onizhuk
Mykyta O.; Khristenko
Inna V.; Chuiko
Iuliia I.; Tkachenko
Oleg S.; Gushikem
Yoshitaka; Kholin
Yuriy V.
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Silica with grafted 1-n-propyl-3-methylimidazolium chloride was investigated as adsorbent for the removal of cobalt(II), copper(II), zinc(II), cadmium(II) and mercury(II) chlorides from alcoholic and aqueous solutions. The adsorption proceeds via the formation of metal-chloride anionic complexes detained near the grafted organic cations as counterions. This conclusion is corroborated by the electronic and Raman spectra. The high removal degrees of the metal chlorides from solutions are easily reached. The adequate models of adsorption equilibria consider dissociation and auto-complexation of chlorides in solutions and formation of tri- and tetrachlorometallate anions in the solid phase. Also, the equilibrium constants for the CoCl2 and CuCl2 adsorption by several materials containing grafted organic cations and chloride counterions were recalculated in the framework of this model. The weak dependence of equilibrium constants on the nature of immobilized cations and carriers agrees with the established chemistry of metal chlorides fixation. 26 6
1160 1170 Ministry of Education and Science of Ukraine [0111U010517, 0113U002428] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) FAPESP [12/50228-5]