Inderscience Publishers

Selective extraction of cadmium by polymer inclusion membranes containing PVC and Aliquat 336: role base polymer and extractant

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PVC/Aliquat 336 Polymer Inclusion Membranes (PIMs) synthesised in this study showed excellent extraction selectivity of Cd2+ over Cu2+. This could be explained by examining the extraction mechanisms of metal cations involving Aliquat 336 and the speciation of such metals in a chloride matrix, which was used in the extraction experiments. There was a good correlation between the content of Aliquat 336 in the membrane and the extraction rate. In addition, results reported here also confirm that variation Molecular Weight (MW) of the base polymer PVC did not exert any discernible influence on the extraction performance of the membranes.

Keywords: PIMs, polymer inclusion membranes, metal extraction, base polymer, PVC, Aliquat 336, cadmium, extraction selectivity, metal removal, copper

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