Abstract
An investigate was carried out to evaluate the catalytic performance of Fe, Al-pillared bentonite in heterogeneous UV-Fenton process. The catalysts were prepared by a cation doping technique. X-ray diffiraction and infraed spectroscopy were used to characterize their properties. Results showed that intercalated process could obtained larger interlayer spacing. Some bands of infrared spectroscopy shifted to lower wave length, indicating that FexAly has intercalated into the layers of the bentonite. The higher ratio of Fe to Al was in the pillaring solution, the higher discolouration rate could be obtained. The discoloration rate reached 79.9% at 20 min and 283K when the ratio of Fe to Al in pillaring solution was 9:1. The reaction constants of the heterogeneous UV-Fenton process increased from 0.074 min-1 at 283K to 0.094min-1 at 323K. Its activation energy was 36.7kJ.mol-1, indicating that temperature had little effect on this process. Little Fe-leaching made it possible for Fe, Al-pillared bentonite to remain a high stability during recycling uses.
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