Application of Benzoyl-Acetone as a Cation Carrier in Mercury (II) Extraction by Using Liquid Membrane Emulsion Technique
Mercury (II) extraction from acidic solution with benzoyl-acetone as a cation carrier by liquid membrane emulsion (LME) technique was researched. The liquid membrane emulsion was made by mixing 15 mL the membrane phase solution (containing 2% mixed surfactant of span-80 & span-20, 0.020 M of Benzoyl-acetone in kerosene) and 15 mL the internal phase solution (containing nitric acid) with emulsification rate of 2000 rpm. The optimum condition for mercury (II) extraction were found as follows : extraction time with 300 rpm rate is 10 minutes, pH of the external phase is 2, concentration of HNO3 in the internal phase is 2 M. Determination of mercury (II) in the external phase after extraction was done by Viscible Spectrophotometer (490 nm) with dithizone as a complexing agent. By using these optimum conditions, 30 ml of LME can extract 30 ppm of mercury (II) within 150 ml of the external phase with extraction percentage of 96.8.