Influence of Ion Exchange and Solvent Extraction Methods to Removal Potentially Toxic Metals from Industrial Effluent Aqueous Phase

Industrial wastewater with heavy metal ions is an environmental concern. Ions of heavy metals from non-biodegradable nature، high toxicity، carcinogenic and cumulative effects، are highly regarded. In this research، hydrometallurgical methods such as solvent extraction method and ion exchange to remove potentially toxic metals Pb، Ni، Cd، Zn and Cu wastewater from the aqueous phase of the industrial area of the Kerman province، including polyethylene، tile، ferromolybdenum factories، coal washing plant and coal mine were examined. In the cationic ion-exchange resin Dowex50wx8 (H +) with 200-400 mesh sizes for extracting organic solvent from Di- (2-ethylhexyl) phosphoric acid (DEHPA or HDEHP) is an organophosphorus and thinners were used as Cruising. In order to find optimal conditions، the effect of various parameters such as pH، the amount of resin، contact time and aqueous phase pH and the concentration of organic solvent in the solvent extraction method was investigated. According to the results، the best pH range between 4 and 6 were obtained for both methods. The optimum concentration of organic solvent extraction is 20% by volume in cruising. Results suggest that the elimination of potentially toxic metals from industrial effluent aqueous phase ion-exchange method is higher than that of organic solvent extraction.