EVALUATION OF RECENT TREATMENT TECHNIQUES FOR REMOVAL OF HEAVY METALS FROM INDUSTRIAL WASTEWATERS.

Removal of heavy metals from industrial wastewaters can be accomplished through various treatment options, including such unit operations as chemical precipitation, coagulation, complexation, activated carbon adsorption, ion exchange, solvent extraction, foam flotation, electrodeposition, cementation, and membrane operations. This paper describes these various treatment strategies and methodologies employed for heavy metal removal. Comparison of their applications in industry are addressed. Advantages and disadvantages for each treatment scheme are also discussed.