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  • Title: [Study on extraction separation of Bi(III), Fe(III), Cu(II), Ni(II), Co(II) and Pb(II) in PEG-(NH4)2SO4-PR system using spectrophotometry].
    Author: Cai H, Zhang CL, Xu XL, Shi Y.
    Journal: Guang Pu Xue Yu Guang Pu Fen Xi; 2003 Apr; 23(2):345-7. PubMed ID: 12961891.
    Abstract:
    In polyethylene PEG-(NH4)2SO4-PR system the extraction separation behaviour of the complexes of Bi(III), Fe(III), Cu(II), Ni(II), Co(II) and Pb(II) was investigated. The results indicated that Bi in pH 3.5-6.5 and Fe(III) in pH 4.0-7.0 were almost completely extracted by the PEG phase, while Cu(II) and Co(II) in pH 1.0-7.0, Pb(II) in pH 2.0-7.0, and Ni(II) in pH 1.0-4.5 were not extracted by the PEG phase. So Bi(III) (pH 3.5) and Fe(III) (pH 5.0) were quantitatively separated from the mixed solution of Bi(III), Fe(III), Cu(II), Co(II), Pb(II) and Ni(II) ions. The extraction mechanism for PEG phase was preliminarily studied.
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