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Catalysts 2019, 9(2), 189; https://doi.org/10.3390/catal9020189

Synergistic Effect of Photocatalytic Degradation of Hexabromocyclododecane in Water by UV/TiO2/persulfate

1
School of Management, Northwestern Polytechnical University, 127 West Youxi Road, Xian 710072, China
2
Research Center of Resource Recycling Science and Engineering, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai 201209, China
3
Centre Testing International Pinbiao (Shanghai) Co., Ltd., 1996 New Jinqiao Road, Shanghai 201206, China
*
Authors to whom correspondence should be addressed.
Received: 4 January 2019 / Revised: 28 January 2019 / Accepted: 31 January 2019 / Published: 18 February 2019
(This article belongs to the Special Issue Emerging Trends in TiO2 Photocatalysis and Applications)
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Abstract

In this work, the elimination of hexabromocyclododecane (HBCD) is explored by using photodegradation of the UV/TiO2 system, the UV/potassium persulfate (KPS) system, and the homo/heterogeneous UV/TiO2/KPS system. The experimental results show that the dosages of TiO2 and potassium persulfate have optimum values to increase the degradation degree. HBCD can be almost completely degraded and 74.3% of the total bromine content is achieved in the UV/TiO2/KPS homo/heterogeneous photocatalysis, much more than in the UV/persulfate system and the UV/TiO2 system. Roles of radicals SO4•− and OH in the photocatalysis systems are discussed based on experimental measurements. The high yield of the concentration of bromide ions and decreased pH value indicates that synergistic effects exist in the UV/TiO2/KPS homo/heterogeneous photocatalysis, which can mineralize HBCD into inorganic small molecules like carboxylic acids, CO2 and H2O, thus much less intermediates are formed. The possible pathways of degradation of HBCD in the UV/TiO2/KPS system were also analyzed by GC/MS. This work will have practical application potential in the fields of pollution control and environmental management. View Full-Text
Keywords: hexabromocyclododecane; environmental management; photocatalysis; advanced oxidation processes hexabromocyclododecane; environmental management; photocatalysis; advanced oxidation processes
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Li, Q.; Wang, L.; Fang, X.; Zhang, L.; Li, J.; Xie, H. Synergistic Effect of Photocatalytic Degradation of Hexabromocyclododecane in Water by UV/TiO2/persulfate. Catalysts 2019, 9, 189.

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