Degradation of acetaminophen in photo-enzyme coupling system with natural organic matters from different sources

被引：15
作者：
Gong, Zhimin [1 ]
Yang, Yun [2 ]
Wang, Mengjie [1 ]
Lu, Kun [1 ]
Liu, Peng [1 ]
Wang, Hanyu [1 ]
Gao, Shixiang [1 ]
机构：
[1] Nanjing Univ, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210093, Jiangsu, Peoples R China
[2] Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Hong Kong, Peoples R China
来源：
SCIENCE OF THE TOTAL ENVIRONMENT | 2020年 / 704卷
基金：
中国国家自然科学基金;
关键词：
Natural organic matter; Acetaminophen; Horseradish peroxidase; SUVA(254 ); E-2/E-3; HORSERADISH-PEROXIDASE; MEDIATED REACTIONS; WATER; PHOTODEGRADATION; PHARMACEUTICALS; TRANSFORMATION; EFFLUENT; REMOVAL; IMPACTS;
D O I：
10.1016/j.scitotenv.2019.135246
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Acetaminophen (AAP) is one of the most commonly prescribed over-the-counter drugs with wide distribution in surface water, which has attracted great attention around the world. Photodegradation and enzymatic transformation are important processes for the removal of AAP in water. The influence of natural organic matter (NOM) from different sources on the transformation of AAP by horseradish peroxidase (HRP) in sunlit water was systematically studied. NOM can effectively promote the combined degradation rate of AAP in photo-enzyme coupling system (PECS), and the promotion extents of different NOM5 were dependent on their aromaticity and average molecular weights. NOM with low aromaticity and low average molecular weight is more effective. In order to disclose the underlying effects of NOM clearly, the reaction mechanism was clarified through the determination of the photodegradation constant and enzymatic reaction constant. The effect of NOM structure on the photo-enzymatic transformation of AAP was quantified, which showed significant positive correlation with the SUVA(254) and E-2/E-3 of NOM. Further investigation revealed that the amount of H2O2 generated by NOM from different sources was also closely related to SUVA(254) and E-2/E-3 of NOM. The findings will facilitate understanding the environmental fate of AAP and other pharmaceutical products in natural water. (C) 2019 Elsevier B.V. All rights reserved.
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页数：8
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