Preparation and Characterization of Cobalt Cation-Exchanged NaX Zeolite as Catalyst for Wastewater Treatment

다국어 초록 (Multilingual Abstract)

The effect of ion exchange with Co2+ on the porous characteristics of NaX was studied. It was confirmed that Na+ in a crystal lattice of NaX could be partially exchanged with Co2+, leading to the deformation of crystal lattice by introduction of Co2+. Consequently, the specific surface area and micropore volume of Co2+-exchanged NaX (Co-NaX) decreased with an increase in the times of ion exchange. On the other hand, the volume of mesopores increased with an increase in the times of ion exchange. The performance of Co-NaX as a catalyst for wastewater treatment was evaluated by degradation of aqueous phenol in the presence of ozone. Although the effect of repeating ion exchange on the catalytic performance of Co-NaX was not significant, the degradation rate of phenol could be increased by the simultaneous use of ozone with NaX or Co-NaX compared with the case of using only ozone.