期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 241, 期 -, 页码 301-306出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2012.09.044
关键词
Tetrabromobisphenol A; TiO2; Debromination; Hydrogen donor; Electron acceptor
资金
- Shanghai Leading Academic Discipline Project [B604]
- special fund of State Key Joint Laboratory of Environment Simulation and Pollution Control [11K07ESPCT]
- NSFC [21007009]
- Chen Guang project [10CG34]
C-Br bond cleavage is considered as a key step to reduce their toxicities and increase degradation rates for most brominated organic pollutants. Here a sequential reduction/oxidation strategy (i.e. debromination followed by photocatalytic oxidation) for photocatalytic degradation of tetrabromobisphenol A (TBBPA), one of the most frequently used brominated flame retardants, was proposed on the basis of kinetic analysis and intermediates identification. The results demonstrated that the rates of debromination and even photodegradation of TBBPA strongly depended on the atmospheres, initial TBBPA concentrations, pH of the reaction solution, hydrogen donors, and electron acceptors. These kinetic data and byproducts identification obtained by GC-MS measurement indicated that reductive debromination reaction by photo-induced electrons dominated under N-2-saturated condition, while oxidation reaction by photoexcited holes or hydroxyl radicals played a leading role when air was saturated. It also suggested that the reaction might be further optimized for pretreatment of TBBPA-contaminated wastewater by a two-stage reductive debromination/subsequent oxidative decomposition process in the UV-TiO2 system by changing the reaction atmospheres. (C) 2012 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据