Trivalent chromium removal from aqueous solutions using low cost zeolitic materials obtained from exhausted FCC catalysts

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

ADSORPTION SCIENCE & TECHNOLOGY

MULTI SCIENCE PUBL CO LTD

Lugar: London; Año: 2011 vol. 29 p. 629 - 636

0263-6174

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.