Removal of an organic dye from water using a predispersed solvent extraction

The removal of Solvent Yellow 1 in a range from 0.25 to 10 ppm by weight fr om an aqueous solution using a predispersed solvent extraction (PDSE) was i nvestigated and compared with conventional solvent extractions in batch mod e. Colloidal liquid aphrons (CLAs) made out of kerosene were used as a pred ispersed organic solvent. To form CLAs. Tergitol 15-S-3 and sodium dodecylb enzene sulfonate were used as oil-soluble and water-soluble surfactants, re spectively. The ratio of solvent volume to pregnant solution volume was les s than 0.025. The efficiency of the extraction with CLAs can be higher than that of a single-staged conventional extraction process with a shorter con tact time. The recovery of used CLAs with a colloidal gas aphrons (CGAs) fl otation was measured using different surfactants. CLAs with an extremely la rge surface area can also reduce processing time and energy cost. PDSE is t herefore a promising process for the removal of organic materials from wate r.