Study on US/O3 mechanism in p-chlorophenol decomposition.
- Author:
Xian-wen XU
1
;
Xin-hua XU
;
Hui-xiang SHI
;
Da-hui WANG
Author Information
1. Department of Environmental Science and Engineering, Zhejiang University, Hangzhou 310027, China. xxw118@zju.edu.cn
- Publication Type:Journal Article
- MeSH:
Chlorophenols;
analysis;
chemistry;
radiation effects;
Computer Simulation;
Industrial Waste;
prevention & control;
Kinetics;
Models, Chemical;
Ozone;
chemistry;
Solutions;
Sonication;
Water;
analysis;
chemistry;
Water Purification;
methods
- From:
Journal of Zhejiang University. Science. B
2005;6(6):553-558
- CountryChina
- Language:English
-
Abstract:
Study on the effects of sonolysis, ozonolysis and US/O3 system on the decomposition of p-chlorophenol in aqueous solutions indicated that in the cases of US/O3 system, individual ozonolysis and sonolysis, the decomposition rate of p-chlorophenol reached 78.78%, 56.20%, 2.79% after a 16-min reaction while its CODcr (chemical oxygen demand) removal rate was 97.02%, 62.17%, 3.67% after a 120-min reaction. The decomposition reaction of p-chlorophenol follows pseudo-first-order kinetics. The enhancement factors of p-chlorophenol and its COD(cr) under US/O3 system reached 63% and 237% respectively. The main intermediates during the decomposition include catechol, hydroquinone, p-benzoquinone, phenol, fumaric acid, maleic acid, oxalic acid and formic acid. The decomposition mechanism of p-chlorophenol was also discussed.
