Treatment of phenol wastewater by microwave-induced ClO2-CuOx/Al203 catalytic oxidation process.
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.
Bi
Xiao-yi
XY
Research Center for Green Chemistry and Technology, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. bixiaoyi@126.com
Wang
Peng
P
Jiang
Hong
H
Xu
Huan-yan
HY
Shi
Shu-Jie
SJ
Huang
Jun-li
JL
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*
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