R. Sahu et al., EXTRACTION AND SEPARATION OF MERCURY USING (SUBSTITUTED)-PYRIMIDO[1,6-A]BENZIMIDAZOLE-1-THIOL (PBT) AND ITS APPLICATION TO INDUSTRIAL EFFLUENTS, Journal of radioanalytical and nuclear chemistry, 200(6), 1995, pp. 509-520
A selective method for the extraction of mercury(II) from hydrochloric
acid solution with trahydro-3,3,4a-trimethyl-7-(substituted)-pyrimido
[1,6-a]benzimidazole-1-thiol, (PET) is proposed. The extraction abili
ty of the system was studied both in strongly acidic (6 mol dm(-3) HCl
) and alkaline (pH 12) media. The optimum extraction conditions were e
valuated from a critical study of the effect of pH, PBT concentration
and metal ion concentration. The probable composition of the species h
as been deduced from lg-lg plots and an extraction mechanism is sugges
ted. A separation scheme is proposed. The method has been applied for
the determination of Hg(II) in industrial waste water.