Ozone catalytic oxidation capacity of Ti-CoAl2 O3 for the treatment of biochemical tailwater from the coal chemical industry
© 2020 Water Environment Federation.
| Veröffentlicht in: | Water environment research : a research publication of the Water Environment Federation. - 1998. - 92(2020), 9 vom: 14. Sept., Seite 1283-1292 |
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| Weitere Verfasser: | , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2020
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| Zugriff auf das übergeordnete Werk: | Water environment research : a research publication of the Water Environment Federation |
| Schlagworte: | Journal Article catalytic ozone oxidation coal chemical industry degradation ozone catalyst Coal Water Pollutants, Chemical Ozone 66H7ZZK23N Titanium |
| Zusammenfassung: | © 2020 Water Environment Federation. A Ti-Coγ-Al2 O3 composite catalyst was prepared using impregnation and sol-gel methods to degrade biochemical tailwater from the coal chemical industry, and its preparation conditions (active component doping ratio, load times, and calcination temperature) were optimized through single-factor experiments. The surface properties of the Ti-Co@γ-Al2 O3 composite catalyst and the crystal structure characteristics of the catalytically active components were characterized via scanning electron microscopy-energy dispersive spectrometry, X-ray diffraction, and X-ray fluorescence. The effects of reaction time, initial pH, ozone aeration, and catalyst dosage on degradation performance were investigated through an experiment on the catalytic ozonation degradation of biochemical tail water. Results showed that the optimal conditions were as follows: reaction time of 30 min, pH of 8.2, ozone aeration of 30 mg/min, and catalyst dosage of 20 g/L. The total phenol and total organic carbon removal rates for biochemical tailwater were 66.1% and 57.6%, respectively, in the catalytic system. The mechanism of degradation of organic pollutants by catalytic ozonation was investigated by adding tert-butanol to the catalytic ozone oxidation system. The degradation of chemical oxygen demand in biochemical tailwater was caused primarily by the synergy between the Ti-Co@γ-Al2 O3 catalyst and ozone. PRACTITIONER POINTS: Ti-Co/γ-Al2 O3 catalyst was prepared for the catalytic oxidation of biochemical tail water. The optimal removal rates of total phenol and TOC were 67.7% and 58.8%, respectively. The organic matter was degraded rapidly and efficiently after 5 min of ozone catalytic oxidation reaction. It provides theoretical guidance for the practical application of ozone catalytic oxidation |
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| Beschreibung: | Date Completed 08.12.2020 Date Revised 14.12.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1554-7531 |
| DOI: | 10.1002/wer.1323 |