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Treatment of phenol wastewater by microwave-induced ClO2-CuOx/Al2O3 catalytic oxidation process
- Source :
-
Journal of Environmental Sciences (Elsevier) . Dec2007, Vol. 19 Issue 12, p1510-1515. 6p. - Publication Year :
- 2007
-
Abstract
- Abstract: The catalyst of CuOx/Al2O3 was prepared by the dipping-sedimentation method using γ-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 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. [Copyright &y& Elsevier]
- Subjects :
- *INDUSTRIAL wastes
*PHENOLS
*OXIDATION
*X-ray diffraction
Subjects
Details
- Language :
- English
- ISSN :
- 10010742
- Volume :
- 19
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Environmental Sciences (Elsevier)
- Publication Type :
- Academic Journal
- Accession number :
- 32019795
- Full Text :
- https://doi.org/10.1016/S1001-0742(07)60246-0