The photochemical oxidation of 4-chlorophenol solutions by ultraviolet irradiation/sodium hypochlorite (UV/NaClO) and ultraviolet irradiation/ozonation (UV/O3) respectively was studied in a pilot scale photochemical reactor. The degradation efficiency of UV/NaClO was lower than that of UV/O3. The final UV absorption removals of the two processes were approximately 80% and approximately 90% respectively. During the two processes, dihydroxylated chlorophenols were the main intermediates. And pH values decreased with the oxidation being carried on. However, the UV/NaClO process was incomplete and some adsorbable organic halogens, such as ethyl 2-chloroacetate, 3,4-dichlorobut-3-en-2-one, ethyl 2,2-dichloroacetate, 2-chloro-1,1-diethoxyethane, ethyl 2,2,2-trichloroacetate and 2,4,6-trichlorophenol, still existed in the final solution. The costs of the two processes were also estimated. On a small scale, UV/NaClO process had significant economic advantage.
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Research Article|
December 01 2009
Comparative study of degradation of 4-chlorophenol by ultraviolet irradiation/sodium hypochlorite and ultraviolet irradiation/ozonation
J. Fu;
1School of Life Science, Nanjing University, Nanjing 210093, People's Republic of China E-mail: jiejeff8@gmail.com; anshq@nju.edu.cn; zhuhl@nju.edu.cn
E-mail: jiejeff8@gmail.com
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J. Huang;
J. Huang
2Medical School, Nanjing University, Nanjing 210093, People's Republic of China E-mail: huangjuanr@163.com; jerry.liuzhong@126.com
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Z. Liu;
Z. Liu
2Medical School, Nanjing University, Nanjing 210093, People's Republic of China E-mail: huangjuanr@163.com; jerry.liuzhong@126.com
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Q. F. Zeng;
Q. F. Zeng
3Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan University of Science & Technology, Wuhan 430073, People's Republic of China E-mail: qfzeng@wuse.edu.cn
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S. Q. An;
S. Q. An
1School of Life Science, Nanjing University, Nanjing 210093, People's Republic of China E-mail: jiejeff8@gmail.com; anshq@nju.edu.cn; zhuhl@nju.edu.cn
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H. L. Zhu
H. L. Zhu
1School of Life Science, Nanjing University, Nanjing 210093, People's Republic of China E-mail: jiejeff8@gmail.com; anshq@nju.edu.cn; zhuhl@nju.edu.cn
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Water Supply (2009) 9 (5): 601–609.
Citation
J. Fu, J. Huang, Z. Liu, Q. F. Zeng, S. Q. An, H. L. Zhu; Comparative study of degradation of 4-chlorophenol by ultraviolet irradiation/sodium hypochlorite and ultraviolet irradiation/ozonation. Water Supply 1 December 2009; 9 (5): 601–609. doi: https://doi.org/10.2166/ws.2009.490
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