Abstract
The liquid–liquid extraction of zinc(II) and cadmium(II) from sulphate medium by 1-phenyl-3-methyl-4-benzoylpyrazol-5-one (HPMBP) in chloroform is studied. The ionic strength effect of the aqueous phase shows that the extraction of the metal increases with decreasing concentration of sulphate. At initially of about 10−4 M with three different sulphate concentrations 0.033, 0.16 and 0.33 M in the aqueous phase, Zn(II) and Cd(II) are extracted as the complexes Zn(PMBP)2 and Cd(PMBP)2. Sulphate complexes of Zn(II) and Cd(II) are formed in the aqueous phase. The metal–sulphate interaction has been made in evidence by using the Debye–Huckel extended limiting law of ionic activity coefficient.
Published Version
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