Solvent extraction of some transition elements with sulphoxides and phosphine oxides |
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| Affiliation: | 1. Center of Chemical, Pharmaceutical and Food Sciences, Lipidomic and Bio-Organic Laboratory, Bioforensic Research Group, Federal University of Pelotas, Eliseu Maciel St., s/n, 96900-010 Pelotas, RS, Brazil;2. Rio Grande do Sul Technical and Scientific Division, Bioforensic Research Group, Brazilian Federal Police, Ipiranga Av., 1365, 90160-093 Porto Alegre, RS, Brazil;1. Bharti School of Engineering, Laurentian University, Sudbury, Ontario P3E 2C6, Canada;2. Strategic Technology Solutions, Barrick Gold Corporation, 3700-161 Bay Street, Toronto, ON M5J 2S1, Canada |
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| Abstract: | Transition elements are known to form anionic chloro complexes and some are efficiently extracted by tributyl phosphate (TBP) from hydrochloric acid medium. In this paper an attempt is made to compare the solvent extraction characteristics of di-n-butyl sulphoxide (DBSO) with TBP in respect of extraction of Cr(VI), Mn(II), Fe(III), Co(II), Cu(II), Zn(II) and Zr(IV) from HCl solutions. The effects of the organic group on the extraction behaviour has been studied by exploring the extraction of Fe(III) by diphenyl sulphoxide (DPSO) and triphenyl phosphine oxide (TPPO). Possible explanations for the extraction in terms of donor-acceptor interaction have been discussed. |
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