255 Removal of Metals From Wastewater Using a Biopolymer Resin

Thursday, November 5, 2009: 2:20 PM
Kohlberg (Camino Real Hotel)
Rachelle Smith , Texas Research Institute for Environmental Studies, Sam Houston State University, Huntsville, TX
Industrial wastewater often contain toxic and hazardous metals. Conventional wastewater treatment techniques that remove metals include chemical precipitation of metal hydroxides, coagulation, flocculation, waste collection and disposal, electrolysis, membrane separation, ion-exchange, and adsorption.  Although effective, these treatment techniques are not cost effective. Thus, there is  need for new, inexpensive, and faster techniques for wastewater treatment.  I present an effective, fast, and inexpensive treatment method for  removing metal contaminants from industrial wastewater using a bio-resin and biosorption.  
Aliquots of a synthetic metal laden waste stream containing cationic states of Cd, Cr, Cu, Pb, Ni, and Zn were treated with the bio-resin to determine treatment time, treatment volume, and pH effects. Wastewater samples  were taken to establish baseline concentrations, typically at 1 ppm per element, and then again at either specific time intervals or volume intervals. The metals concentrations were determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and then removal percentages were determined.  Percent removal of metals averaged greater than 80% for time treatments and varied from 65 to 89% for volume treatments.  Results indicate that bio-resin may be an effective, quickly, and economical method for  removing of metals  from industrial wastewater.