文献类型：期刊文献

英文题名：Unveiling the impacts of bromide and nitrite interaction on the degradation of bisphenol A during sulfate radical oxidation

作者：Gui, Jingjing[1];Wang, Lu[2];Yang, Peizeng[1];Lu, Junhe[1];Ji, Yueifei[1];Chen, Jing[1];Zhang, Yueqing[3];Kong, Deyang[3]

机构：[1]Nanjing Agr Univ, Dept Environm Sci & Engn, Nanjing 210095, Peoples R China;[2]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Peoples R China;[3]Minist Ecol & Environm China, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China

年份：2025

卷号：75

外文期刊名：JOURNAL OF WATER PROCESS ENGINEERING

收录：SCI-EXPANDED(收录号：WOS:001500149100004)、、Scopus(收录号：2-s2.0-105005788291)、WOS

基金：This research was supported by the Natural Science Foundation of Jiangsu Province (BK20231005) , and the National Natural Science Foundation of China (22076079, 22076080, 22306122) . The contents of the paper do not necessarily represent the views of the funding agency.

语种：英文

外文关键词：Bisphenol A; Sulfate radical; Nitrite; Bromide; Nitrated byproducts

外文摘要：Sulfate radical (SO4 center dot-) oxidation processes have the capacity to effectively degrade bisphenol A (BPA), an endocrine disruptor of great concern. However, potential environmental risks associated with generating harmful byproducts in this process remain largely unknown. This study revealed that nitrated byproducts were generated during the degradation of BPA by SO4 center dot- oxidation with nitrite (NO2- ) present. This is due to the production of nitrogen dioxide radical (NO2 center dot) through the reaction of NO2- and SO4 center dot-, which further combines with phenoxy radicals originating from BPA oxidation, leading to nitrated byproducts. Moreover, bromide (Br- ) facilitated the transformation of NO2- to nitrated byproducts in this process. When 150 mu M Br- and 100 mu M NO2- were both in the solution, the total formation of identified nitrophenols (i.e., 2-nitrophenol, 4-nitrophenol, and 2,4-dinitrophenol) reached 0.67 +/- 0.02 mu M, compared to 0.55 +/- 0.01 mu M with NO2 - alone. Nitryl bromide (NO2Br) generated from the interaction of NO2- and free bromine in situ formed from Br- oxidation was identified to play a pivotal role. It directly reacts with BPA and some intermediates via electrophilic substitution, leading to nitrated byproducts with Br- releasing. Coherently with the enhanced nitrated byproducts formation, toxicity test showed that the BPA sample treated by SO4 center dot- in the co-presence of Br- and NO2- was more toxic than that with NO2 - alone. Thus, it is required to keep a watchful eye on undesired byproducts formation when SO4 center dot- oxidation technologies are applied in realistic environments where Br- and NO2 - are commonly co-existing.