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Fate of sulfamethoxazole and potential formation of haloacetic acids during chlorine disinfection process in aquaculture water

文献类型： 外文期刊

作者： Lou, Xiaoyi 1 ; Liu, Zhiyuan 1 ; Fang, Changling 1 ; Tang, Yunyu 1 ; Guan, Jie 2 ; Guo, Yaoguang 2 ; Zhang, Xuan 1 ; Shi, Yongfu 1 ; Huang, Dongmei 1 ; Cai, Youqiong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, East Sea Fisheries Res Inst, Lab Qual Safety & Proc Aquat Prod, Shanghai 200090, Peoples R China

2.Shanghai Polytech Univ, Sch Resources & Environm Engn, Shanghai 201209, Peoples R China

关键词： Chlorination; Kinetics; Antibiotics; Bromine; Haloacetic acids

期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.431； 五年影响因子：8.399 ）

ISSN： 0013-9351

年卷期： 2022 年 204 卷

页码：

收录情况： SCI

摘要： There exist two common processes in fishery culture, i.e. antibiotic addition to reduce disease in fishery, and chlorination disinfection to inhibit infectious pathogenic microorganisms. However, antibiotic residues might play important reverse side roles for both aquaculture water pollution and potential formation of chlorination side products. Herein, the transformation behaviour, intermediates analyses and conversion pathway of antibiotic sulfamethoxazole (SMX), and potential generation of halogenated acetic acids (HAAs) in the process of chlorination in fishery water were examined, and the results revealed that the decomposing of SMX satisfied a pseudo first-order kinetic equation. Both the addition of available chlorine and high temperature had affirmative influences on the decontamination of SMX and production of HAAs, and the near-neutral pHs promoted the removal of SMX and generation of HAAs. Br was favorable for the removal of SMX and yields of brominated acetic acids (Br-AAs). Based on the identified intermediate products, the transformation path of SMX in chlorination process was propounded, to wit, the C-S and S-N bonds in the SMX molecules were firstly cracked, and the primeval intermediate groups are then transformed to form chloroanilines, chlorophenols, etc., and subsequently, chlorophenols were chlorinated and ring-opened to generate toxic HAAs. This study might be meaningful to evaluate the effective removal of sulfonamide antibiotic residues and the potential generation of halogenated DBPs (H-DBPs) when chlorinated in aquaculture water.

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