Extraction of Ni(II) from spent Cr-Ni electroplating bath solutions using LIX 63 and 2BDA as carriers by emulsion liquid membrane technique

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 6 min. The higher separation factor (beta Ni/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. (C) 2014 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.