Poster Purification Of Wastewater Contaminated With Organic Molecules By Liquid- Liquid Extraction Process: Case Of Aniline

Abstract

The industry uses toxic organic compounds that pollute the waste water, sometimes with large flows. Aniline is an importantsource of pollution, and is essentially the result of industrial waste, such as polymers, insecticides, dyes etc.Research done on the destruction of organic pollutants in aqueous-phase is mostly interested to effective and not expensiveprocess; the method of liquid-liquid extraction showed large depollution capacities of wastewater containing organic molecules.This work focuses on the recovery of aniline by the process of liquid-liquid extraction, using Chloroform and Dichloromethaneas solvents and Cyclohexane as diluent. An experimental parametric study was conducted to determine the optimum conditionsfor a better extraction.The results have shown that over 92% of aniline can be extracted by the use of Chloroform as a solvent in the followingoptimal conditions: solvent concentration = 4M, Vagi = 300 rev / min, contact time = 15 min,ratio O/ aq = 30/20, settling time= 30 min and initial solute concentration = 600 ppm.Finally, the experimental results have been projected theoretically by calculating the partitioning coefficient and materialbalances necessary to verify the number of stages and compare the practice fractions with those theoretical.