期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 278, 期 -, 页码 152-157出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2014.05.064
关键词
Active carbon; Degradation; Microwave; Hydroxyl radicals ((OH)-O-center dot); Loaded TiO2
资金
- Natural Science Foundation of Science &Technology Department of Liaoning Province in China [201202091]
- Science Research Plan Project [L2012006]
- Environmental Science Key Discipline Project of Liaoning Province Education Department in China
- 211 Project of Liaoning University of China
In order to study the degradation mechanism of technology of microwave (MW) combined with TiO2 supported on activated carbon (TiO2/AC), the reactive oxygen species (ROS) was explored through oxidation of 1,5-diphenyl carbazide (DPCI) to 1,5-diphenyl carbazone (DPCO). Furthermore, 2,6-di-tert-butyl-4-methylphenol (BHT), Mannitol (MT) and Vitamin C (VC) were used as radical scavengers to confirm the generation of the hydroxyl radicals ((OH)-O-center dot). In addition, the influence of some parameters such as TiO2 mass ratio content, irradiation time, material dose, DPCI concentration and MW power on the determination of (OH)-O-center dot were examined. The results showed that the (OH)-O-center dot could be generated under MW combined with loaded TiO2/AC. Also, anatase TiO2/AC can generate more (OH)-O-center dot radicals than rutile TiO2/AC under MW irradiation. This work would provide new mechanistic insights on the enhanced degradation effect of organic pollutants in water using the supported TiO2/AC coupled with MW technology. (C) 2014 Elsevier B.V. All rights reserved.
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