Deciphering the photolysis products and biological concerns of triclosan under UVC and UVA

Li，Li Ping1; Jin，Yan Chao2,3; Ren，Dong4; Wang，Jun Jian5,6; Fang，Le1; Li，Xia1; Zhang，Xin7; Cui，Ding Wei1; Chen，Xi1; Liu，Xin Hui1,7

2023-06-15

10.1016/j.ecoenv.2023.114998

Ecotoxicology and Environmental Safety   影响因子和分区

0147-6513

1090-2414

Triclosan (TCS) is omnipresent in the environment and has drawn increasing attention due to its potential adverse effects on human health. Direct photolysis of TCS readily occurs, especially in the surface layers of waters that receive abundant ultraviolet radiation during the daytime. However, biological concerns and the identification of toxic products during TCS photolysis have been explored limitedly. Therefore, in the present work, the structural characterization of the photolysis products by UVC and UVA were performed based on the mass spectra and fragmental ions. The results displayed that TCS was more readily eliminated by UVC than UVA, and the product species were completely different when TCS was degraded by UVC and UVA, respectively. Two products, m/z 235 and m/z 252, were produced via reductive dechlorination and nucleophilic substitution with UVC, while three dioxin-like isomer products were generated by dechlorination, cyclization and hydroxylation. Furthermore, the results of biological concerns suggested that the elimination of TCS did not represent the disappearance of biological risks. Specifically, more hazardous and photolysis products were formed during TCS photolysis with ultraviolets. For instance, the dioxin-like isomer products were highly microtoxic and genotoxic, and mildly antiestrogenic. The positive findings highlighted the biological concerns of TCS photolysis by ultraviolet radiation in the aquatic environment.

Biological concerns Photolysis Products Triclosan UVA and UVC

SCI

英语

其他

National Natural Science Foundation of China[42207422];

Environmental Sciences & Ecology ; Toxicology

Environmental Sciences ; Toxicology

WOS:001002880300001

ACADEMIC PRESS INC ELSEVIER SCIENCE

ENVIRONMENT/ECOLOGY

2-s2.0-85158875478

Scopus

1.Advanced Institute of Natural Sciences,Beijing Normal University,Zhuhai,519087,China
2.College of Environmental Science and Engineering,Fujian Normal University,Fuzhou,350007,China
3.Fujian Key Laboratory of Pollution Control & Resource Reuse,Fuzhou,350007,China
4.College of Environmental Science and Engineering,China West Normal University,Nanchong,637009,China
5.Guangdong Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
6.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
7.School of Environment,Beijing Normal University,Beijing,100875,China

Li，Li Ping,Jin，Yan Chao,Ren，Dong,et al. Deciphering the photolysis products and biological concerns of triclosan under UVC and UVA[J]. Ecotoxicology and Environmental Safety,2023,258.

Li，Li Ping.,Jin，Yan Chao.,Ren，Dong.,Wang，Jun Jian.,Fang，Le.,...&Liu，Xin Hui.(2023).Deciphering the photolysis products and biological concerns of triclosan under UVC and UVA.Ecotoxicology and Environmental Safety,258.

Li，Li Ping,et al."Deciphering the photolysis products and biological concerns of triclosan under UVC and UVA".Ecotoxicology and Environmental Safety 258(2023).