Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 164, Issue 2-3, Pages 1414-1419Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.09.053
Keywords
Palladium; Recovery; Chelating ion exchanger; Cationic ion exchanger
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The increasing demand for palladium for technological application requires the development of ion exchange chromatography. Recently ion exchange chromatography has developed largely as a result of new types of ion exchangers available on the market of which two types are widely applied. One of them are selective (chelating) and modified ion exchangers and the other one are liquid exchangers. Two types of ion exchange resins such as chelating (Lewatit TP 214, Purolite S 920) and cationic (Chelite S, Duolite GT 73) ion exchangers are used for the recovery of palladium(II) complexes from chloride media (0.1-2.0 M HCl-1.0 M NaCl-0.0011 M Pd(II); 0.1-2.0 M HCl-2.0 M NaCl-0.0011 M Pd(11)). The influence of concentration of hydrochloric acid, sodium chloride as well as the phase contact time on the degree of recovery of palladium(II) complexes was studied. Moreover, the amount of palladium(II) chlorocomplexes sorbed onto ion exchangers, the working ion exchange capacities and the weight and bed distribution coefficients were calculated in order to judge which of two types of resins possesses the best performance towards palladium(II) complexes. (C) 2008 Published by Elsevier B.V.
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