Journal of Radioanalytical and Nuclear Chemistry

, Volume 200, Issue 6, pp 509–520 | Cite as

Extraction and separation of mercury using 3,4,4a,5-tetrahydro-3, 3,4a-trimethyl-7-(substituted)-pyrimido [1,6-a] benzimidazole-1-thiol (PBT) and its application to industrial effluents

  • R. Sahu
  • S. M. Sondhi
  • B. Gupta


A selective method for the extraction of mercury(II) from hydrochloric acid solution with 3,4,4a,5-tetrahydro-3,3,4a-trimethyl-7-(substituted)-pyrimido [1,6-a]-benzimidazole-1-thiol, (PBT) is proposed. The extraction ability of the system was studied both in strongly acidic (6 mol dm−3 HCl) and alkaline (pH 12) media. The optimum extraction conditions were evaluated from a critical study of the effect of pH, PBT concentration and metal ion concentration. The probable composition of the species has been deduced from lg-lg plots and an extraction mechanism is suggested. A separation scheme is proposed. The method has been applied for the determination of Hg (II) in industrial waste water.


Waste Water Mercury Hydrochloric Acid Industrial Waste Extraction Condition 
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Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • R. Sahu
    • 1
  • S. M. Sondhi
    • 1
  • B. Gupta
    • 1
  1. 1.Department of ChemistryUniversity of RoorkeeRoorkeeIndia

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