Formation of 2'-hydroxy-2,3',4,5'-tetrabromodipheyl ether (2'-HO-BDE68) from 2,4-dibromophenol in aqueous solution under simulated sunlight irradiation.
Formation of 2'-hydroxy-2,3',4,5'-tetrabromodipheyl ether (2'-HO-BDE68) from 2,4-dibromophenol in aqueous solution under simulated sunlight irradiation.
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DOI：
10.1016/j.chemosphere.2011.03.011
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发表时间：
2011-07
期刊：
影响因子：
8.8
通讯作者：
Hui Liu;Huimin Zhao;X. Quan;Yaobin Zhang;Shuo Chen;Hongxia Zhao
中科院分区：
文献类型：
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作者：
Hui Liu;Huimin Zhao;X. Quan;Yaobin Zhang;Shuo Chen;Hongxia Zhao
羟基化多溴联苯醚（HO-PBDEs）由于其毒性和在环境基质中的普遍存在而受到了极大的关注。然而，它们的起源尚不完全清楚。溴苯酚是一种常见的淡水和海洋环境中人为来源和自然来源的污染物，我们探索了通过光化学过程生成ho -多溴二苯醚的可行性。结果表明，当2,4-二溴苯酚（2,4- dibp）在模拟阳光下照射水溶液时，作为2,4- dibp的二聚体产物，迅速形成了大量的2 ' -羟基-2,3 ',4,5 ' -四溴二苯醚（2 ' -HO-BDE68）。2’-HO-BDE68的形成随着光照强度的增加和2,4- dibp初始浓度的增加而增强，而随着ph的增加而减弱。Fe（III）和黄腐酸在2’-HO-BDE68的形成中起重要作用。本研究通过光化学方法对天然水生系统中溴酚中ho -多溴二苯醚的可能来源提供了重要见解。
Hydroxylated polybrominated diphenyl ethers (HO-PBDEs) have received significant attention due to their toxicities and universal presence in the environmental matrices. However, their origins are not fully understood. We explored the feasibility of the generation of HO-PBDEs through photochemical processes from bromophenol, a commonly detected pollutant with anthropogenic source in freshwater and natural source in the marine environment. The results showed that when 2,4-dibromophenol (2,4-diBP) was irradiated in aquatic solutions under simulated sunlight, significant amounts of 2′-hydroxy-2,3′,4,5′-tetrabromodipheyl ether (2′-HO-BDE68) were rapidly formed as the dimeric product of 2,4-diBP. The formation of 2′-HO-BDE68 intensified with the increase of light intensity and with the initial concentration increase of 2,4-diBP, whereas it weakened with an increase in pH. Moreover, Fe(III) and fulvic acid played important roles in the formation of 2′-HO-BDE68. This study provides important insight into a possible source of HO-PBDEs from bromophenols in natural aquatic systems through photochemical approaches.