DEGRADATION OF 2,4,6-TRICHLOROPHENOL BY UV/O<sub>3</sub>/TiO<sub>2</sub> COUPLING PROCESS

ZHU Tong; YANG Shi-peng; TAN Wei-qiang; WANG Kai-jun

doi:10.13205/j.hjgc.202103002

Volume 39 Issue 3

Jul. 2021

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ZHU Tong, YANG Shi-peng, TAN Wei-qiang, WANG Kai-jun. DEGRADATION OF 2,4,6-TRICHLOROPHENOL BY UV/O3/TiO2 COUPLING PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 7-13. doi: 10.13205/j.hjgc.202103002

Citation:

ZHU Tong, YANG Shi-peng, TAN Wei-qiang, WANG Kai-jun. DEGRADATION OF 2,4,6-TRICHLOROPHENOL BY UV/O₃/TiO₂ COUPLING PROCESS[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(3): 7-13. doi: 10.13205/j.hjgc.202103002

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DEGRADATION OF 2,4,6-TRICHLOROPHENOL BY UV/O₃/TiO₂ COUPLING PROCESS

doi: 10.13205/j.hjgc.202103002

1. School of Environmental and Municipal Engineering, Qingdao University of Technology, Qingdao 266033, China;
2. School of Environment, Tsinghua University, Beijing 100084, China

Received Date: 2020-06-16
Available Online: 2021-07-19

Abstract

Abstract

This paper broke the technical bottleneck of low ozone utilization of advanced oxidation technology based on ozone, through constructing a reaction system of UV/O₃/TiO₂ coupling process. The reaction mechanism of UV/O₃/TiO₂ coupling process was analyzed by ESR and fluorescence probe method, and it was clear that the self recycling of oxygen produced by ozone chain reaction in the reaction system was the main reason to improve ozone utilization. Taking 2,4,6-trichlorophenol as the target pollutant, through the analysis of initial concentration, contact time, pH, catalyst dosage and other factors, the degradation effect of UV/O₃ and UV/TiO₂ processes was compared, which highlighted the technical advantages of UV/O₃/TiO₂ coupling process. The results showed that the mineralization rate of 2,4,6-trichlorophenol solution by UV/TiO₂ and UV/O₃ was 12.65% and 51.54% in the same condition, and the reaction rate constant was 0.0058 min^-1 and 0.1956 min^-1 respectively. The mineralization rate of 2,4,6-trichlorophenol by UV/O₃/TiO₂ was 82.97% and the reaction rate constant was 0.2893 min^-1. The utilization ratio of ozone was increased by 11.7% in the coupling process with good adaptability in the wide range of pH=3~11. The result could provide data support for theoretical research conclusion.
- UV/O₃/TiO₂,
- 2,4,6-TCP,
- photocatalytic ozonation,
- hydroxyl radical

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References(30)

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