四溴双酚A的光转化过程及机理  

Photodegradation process and mechanism of Tetrabromobisphenol A

作　　者：姜雨晴 王玲 林泳峰 李颖 刘爱风 JIANG Yuqing;WANG Ling;LIN Yongfeng;LI Ying;LIU Aifeng(College of Environmental Science and Engineering,Qingdao University,Qingdao,266071,China;School of Public Health,Qingdao University,Qingdao,266071,China)

机构地区：[1]青岛大学环境科学与工程学院,青岛266071 [2]青岛大学公共卫生学院,青岛266071

出　　处：《环境化学》2022年第4期1226-1235,共10页Environmental Chemistry

基　　金：国家自然科学基金(22006083)资助。

摘　　要：四溴双酚A(Tetrabromobisphenol A,简称TBBPA)作为目前使用最广泛的溴系阻燃剂,通过生产、使用、处置等环节进入到环境中,并通过环境降解过程转化为新型的有机污染物,产生未知环境风险.光转化是环境中有机污染物降解的主要方式之一,转化效率高、速度快.本文综述了TBBPA及其衍生物在光照条件下的模拟环境光转化和光催化过程及机理.TBBPA及其衍生物在光辐射条件下易发生转化,转化效率和速率受到pH、初始浓度、溶解氧等环境条件的影响,光催化剂会显著提升TBBPA的转化速率.TBBPA的光转化机理包括脱溴、β-断裂、羟基化等,产物主要包括三溴双酚A、二溴双酚A、4-异丙烯基-2,6-二溴苯酚、2,6-二溴苯酚、羟基化三溴双酚A等.相较于TBBPA,针对TBBPA衍生物的光降解过程和机理尚不明晰,未来需要进一步对TBBPA及衍生物光转化过程进行研究,为其迁移转化过程的机理和相关未知污染物的监控提供理论支持,为综合评估TBBPA类溴代阻燃剂的环境风险提供科学依据.As the most widely used brominated flame retardant(BFR)at present,tetrabromobisphenol A(TBBPA)enters the environment during the process of production,usage and disposal.TBBPA and its derivatives could transform into new organic substances through environmental degradation process,resulting in unknown environmental risks.Photodegradation is one of the main pathways to eliminate organic substances in the environment with high efficiency and fast speed.In this paper,the simulative environment photodegradation and photocatalysis process and mechanism of TBBPA and its derivatives under light conditions were reviewed.TBBPA and its derivatives are easily transformed under the condition of light radiation.The photodegradation efficiency and rate are affected by pH,initial concentration,dissolved oxygen and other environmental conditions.The photocatalysts can significantly improve the conversion rate of TBBPA.The photodegradation mechanism includes debromination,β-scission,hydroxylation,etc,and the products mainly include tribromobisphenol A,dibromobisphenol A,4-isopropyl-2,6-dibromophenol,2,6-dibromophenol,hydroxylated tribromobisphenol A and so on.Compared with TBBPA,the photodegradation process and mechanism of TBBPA derivatives are still unclear,and further studies on the photodegradation process of TBBPA and its derivatives are needed in the future.It will provide theoretical support for the mechanism of their migration and transformation process and the monitoring of related unknown pollutants,and provide a scientific basis for the comprehensive assessment of environmental risks of brominated flame retardants.

关 键 词：四溴双酚A 四溴双酚A衍生物 光转化 降解机理 

分 类 号：X505[环境科学与工程—环境工程]