title: Treatment of phenol wastewater by microwave-induced ClO2-CuOx/Al203 catalytic oxidation process.
abstract: The catalyst of CuOx/Al2O3 was prepared by the dipping-sedimentation method using gamma-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 ClO2-CuOx/Al2O3 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 min, catalyst dosage 50 g/L, pH 9), phenol removal percentage approached 92.24%, corresponding to 79.13% of COD(Cr) 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 C1O2 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.
authors.affiliation: Research Center for Green Chemistry and Technology, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. bixiaoyi@126.com
authors.forename: Xiao-yi
authors.initials: XY
authors.lastname: Bi
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
authors.forename: Huan-yan
authors.initials: HY
authors.lastname: Xu
authors.forename: Shu-Jie
authors.initials: SJ
authors.lastname: Shi
authors.forename: Jun-li
authors.initials: JL
authors.lastname: Huang
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D002384:Catalysis; D017606:Chlorine Compounds / Q000737:chemistry*; D003300:Copper / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D008872:Microwaves; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry* / Q000528:radiation effects*; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D017606:Chlorine Compounds; D007220:Industrial Waste; D010087:Oxides; D014874:Water Pollutants, Chemical; D019800:Phenol; D003300:Copper; C025109:chlorine dioxide; D000537:Aluminum Oxide; C030973:cupric oxide