Abstract
In the present study, the synergistic extraction of Ni(II) from spent Cr–Ni electroplating bath solutions (SEBS) was determined using 5,8-diethyl-7-hydroxydodecan-6-one oxime(LIX 63) and 2-bromodecanoic acid(2BDA) by emulsion liquid membranes(ELM)s. The effect of membrane and aqueous phase properties on Ni(II) transport was experimentally investigated. Ni(II) extraction was obtained to be higher than 98.5% in the optimum conditions within 6min. The higher separation factor (βNi/Cr) was obtained as 677. In addition, Ni(II) extraction kinetics depends on LIX63 because the extraction kinetics of LIX63 is slower than 2BDA. Therefore, we have determined that 2BDA acts as a synergist in present extraction system.
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