Worldwide attention has been attracted to 1,4-dioxane because of its probable human carcinogenicity and frequent occurrence in surface waters and wastewaters. Thus, many countries and organizations have set limits for the amount of this material in drinking water and wastewater effluent. However, the removal of 1,4-dioxane during traditional treatment processes, even ozonation (pH < 7), has been limited. Therefore, 1,4-dioxane removal during catalytic ozonation was investigated in this study, and activated carbon was selected as the ideal catalyst. The removal efficiency of 1,4-dioxane by ozonation was promoted significantly using activated carbon compared with that of ozonation only. Tert-butyl alcohol significantly reduced the removal efficiency of 1,4-dioxane during catalytic ozonation, which suggested that hydroxyl radicals (·OH) were formed during catalytic ozonation and played an important role in decomposing 1,4-dioxane. Additionally, results concerning the stability of activated carbon indicated that the catalytic activity of this catalyst remained steady during ozonation.
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Research Article|
September 29 2016
Promoted ozonation for the decomposition of 1,4-dioxane by activated carbon
Gui-Peng Tian;
Gui-Peng Tian
1Environmental Simulation and Pollution Control State Key Joint Laboratory, and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China
2Shenzhen Laboratory of Microorganism Application and Risk Control, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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Qian-Yuan Wu;
Qian-Yuan Wu
2Shenzhen Laboratory of Microorganism Application and Risk Control, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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Ang Li;
Ang Li
1Environmental Simulation and Pollution Control State Key Joint Laboratory, and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China
2Shenzhen Laboratory of Microorganism Application and Risk Control, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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Wen-Long Wang;
Wen-Long Wang
1Environmental Simulation and Pollution Control State Key Joint Laboratory, and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China
2Shenzhen Laboratory of Microorganism Application and Risk Control, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
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Hong-Ying Hu
1Environmental Simulation and Pollution Control State Key Joint Laboratory, and State Environmental Protection Key Laboratory of Microorganism Application and Risk Control (SMARC), School of Environment, Tsinghua University, Beijing 100084, China
2Shenzhen Laboratory of Microorganism Application and Risk Control, Graduate School at Shenzhen, Tsinghua University, Shenzhen 518055, China
3Tsinghua-Berkeley Shenzhen Institute, Shenzhen 518055, China
E-mail: hyhu@tsinghua.edu.cn
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Water Supply (2017) 17 (2): 613–620.
Article history
Received:
November 19 2015
Accepted:
April 13 2016
Citation
Gui-Peng Tian, Qian-Yuan Wu, Ang Li, Wen-Long Wang, Hong-Ying Hu; Promoted ozonation for the decomposition of 1,4-dioxane by activated carbon. Water Supply 1 March 2017; 17 (2): 613–620. doi: https://doi.org/10.2166/ws.2016.071
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