Abstract
The separation of mercury from waste water by means of the liquid membrane process (LMP) was investigated. The mercury was transferred from the external continuous phase across the liquid membrane to the internal phase. Dibutylbenzoylthiourea was used as a carrier in the liquid membrane, and Rofetan OM as a surfactant. The mercury reacts with thiourea in the internal phase to give a mercury—urea complex. The chemical system used for LMP is very efficient in the transfer of mercury. Laboratory experiments were primarily concerned with the influence of different volume ratios and initial concentrations of mercury. In the majority of cases more than 95% of the mercury in the external phase is transferred across the liquid membrane within three minutes. The experimental values could be quantitatively represented by an empirical model.
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