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

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

MICROPOROUS AND MESOPOROUS MATERIALS

ELSEVIER SCIENCE BV

Año: 2011

1387-1811

The hydrothermal zeolitization of exhausted FCC catalysts was optimized by varying the chemical composition of the starting mixture. The reaction products were used to evaluate its ability for the capture of Cr (III) cations present in aqueous solution. 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.