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Insights into antimicrobial agent sulfacetamide transformation during chlorination disinfection process in aquaculture water

文献类型： 外文期刊

作者： Guo, Yaoguang 1 ; Liu, Zhiyuan 1 ; Lou, Xiaoyi 2 ; Fang, Changling 2 ; Wang, Pu 1 ; Wu, Genying 3 ; Guan, Jie 1 ;

作者机构： 1.Shanghai Polytech Univ, Sch Environm & Mat Engn, Shanghai 201209, Peoples R China

2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Lab Qual Safety & Proc Aquat Prod, Shanghai 200090, Peoples R China

3.Lishui Municipal Ecol Environm Bur, Longquan Branch, Longquan 323700, Peoples R China

期刊名称：RSC ADVANCES （ 影响因子：3.361； 五年影响因子：3.39 ）

ISSN：

年卷期： 2021 年 11 卷 24 期

页码：

收录情况： SCI

摘要： Antibiotic addition and chlorination are two common processes in fishery culture. Antibiotic residues not only pollute aquaculture water, but are also one of the potential precursors of disinfection by-products (DBPs) during chlorination. The degradation kinetics, products identification and reaction mechanism of sulfacetamide (SFA), a new sulfonamides antibiotics, and potential formation of haloacetic acids (HAAs) in chlorination were explored. The results showed that the degradation of SFA followed pseudo first-order kinetic model, and chlorinating agent dose, pH of water, water temperature, NH4+, HCO3- and humic acid (HA) had various effects on the degradation of SFA and the yields of HAAs. The presence of Br- accelerated both the degradation rate of SFA and more formation of Br-DBPs. Through the identification of intermediate products, we proposed the transformation pathway of SFA during the chlorination disinfection process. Namely, in this NaClO disinfection system, the C-S bond between the sulfonyl group and benzene ring, and S-N bond between sulfonyl and acylamino of SFA were broken, and then the primary formed groups were further oxidized to produce intermediates, such as chloroanilines and chlorophenols. And then chlorophenols were subsequently chlorinated to form toxic HAAs. The present study might be of significance for the evaluation of effective degradation of SFA and potential production of halogenate-DBPs (H-DBPs) during the chlorination disinfection process in aquaculture water.

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