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Treatment of phenol wastewater by microwave-induced CIo_2-Cuo_x/al_2o_3 catalytic oxidation process

Journal of Environmental Sciences 2007年第12期19卷 1510-1515页

作者： BI Xiao-yi WANG Peng JIANG Hong XU Huan-yan SHI Shu-jie HUANG Jun-li Research Center for Green Chemistry and Technology School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 China

The catalyst of cuox/al2o3 was prepared by the dipping-sedimentation method using y-al2o3 as a supporter. Cuo and Cu2o were loaded on the surface of al2o3, characterized by X-ray diffraction （XRD） and X-ray photoelectron spectroscopy （XPS）. In the presence of cuox/al2o3, the microwave-induced chlorine dioxide （Clo2） catalytic oxidation process was conducted for the treatment of synthetic wastewater containing 100 mg/L phenol. The factors influencing phenol removal were investigated and the results showed that microwave-induced C102-cuox/ml203 process could effectively degrade contaminants in a short reaction time with a low oxidant dosage, extensive pH range. Under a given condition （Clo2 concentration 80 mg/L, microwave power 50 W, contact time 5 latin, catalyst dosage 50 g/L, pH 9）, phenol removal percentage approached 92.24%, corresponding to 79.13% of CoDcr removal. The removal of phenol by microwave-induced Clo2-cuox/al2o3 catalytic oxidation process was a complicated non-homogeneous solid/water reaction, which fitted pseudo-first-order by kinetics. Compared with traditional Clo2 oxidation, Clo2 catalytic oxidation and microwave-induced Clo2 oxidation, microwave-induced Clo2 catalytic oxidation system could significantly enhance the degradation efficiency. It provides an effective technology for the removal of phenol wastewater.

关键词： microwave-induced oxidation Clo2 cuox/al2o3 phenol wastewater

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