Specific membrane transport of mercury as [Hg(SCN){sub 4}]{sup 2{minus}} ion using K{sup +}-dibenzo-18-crown-6 as carrier
- Razi Univ., Kermanshah (Iran, Islamic Republic of). Dept. of Chemistry
Potassium-dibenzo-18-crown-6 complex cation was used as carrier for the uphill transport of mercury as [Hg(SCN){sub 4}]{sup 2{minus}} complex anion through a chloroform membrane system. By using 0.2 mol/L EDTA as a metal ion acceptor in the receiving phase at the optimized pH of 10.0, the amount of mercury transport through the liquid membrane after 120 minutes was 94.2 {+-} 0.7%. The selectivity and efficiency of mercury transport from aqueous solutions containing equimolar mixtures of Co{sup 2+}, Ni{sup 2+}, Cu{sup 2+}, Zn{sup 2+}, Pb{sup 2+}, and Cd{sup 2+} ions were investigated. in the presence of 0.05 mol/L EDTA at pH 3.2 as a proper masking agent in the source phase, the interfering effects of Zn{sup 2+}, Pb{sup 2+}, and Cu{sup 2+} ions were eliminated.
- OSTI ID:
- 691490
- Journal Information:
- Separation Science and Technology, Vol. 34, Issue 12; Other Information: PBD: Sep 1999
- Country of Publication:
- United States
- Language:
- English
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