A comprehensive study pertaining to liquid emulsion membrane (LEM) extraction process of methylene blue from wastewater is presented. The liquid membrane is made of an emulsifying agent (Monumal 80) with various organic diluents. Surfactant (5 wt%) (Monumal 80) and kerosene gave good extraction. Important variables affecting LEM permeation process include stability of membrane, contact time of extraction, strip phase concentration, treat ratio (strip phase: organic phase), stirring speed, feed phase concentration were systematically studied for percentage of extraction by LEM. Kerosene as diluent gave 99.57% extraction with NaOH as strip phase. © 2012 Canadian Society for Chemical Engineering
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