Trivalent chromium removal from wastewater using low cost zeolitized mixtures derived from exhausted FCC catalysts

M. R. GONZALEZ; A. M. PEREYRA; E. I. BASALDELLA

Nápoles

Congreso; 10th Congress of Italian Zeolite Association. Advances in Zeolite Science and Technology An International Symposium celebrating Carmine Colella?s 70th birthday; 2011

Italian Zeolite Association

The hydrothermal zeolitization of exhausted FCC catalysts was optimized by varying the chemical composition of the synthesis mixture. The zeolitic products obtained were used to evaluate its ability for the capture of Cr (III) cations from aqueous solutions. It was proved that the zeolitized materials were able to reduce the Cr(III) concentration to values lower than 1.2 ppm. The chromium-containing solids were afterwards solidified in cement mortars on which leaching studies of this cation were made. Results show that the synthesized solids act as effective Cr(III) immobilizers and their inclusion as  additives in cement formulations could constitute an environmental friendly disposal procedure.