Role of dissolved organic matter from natural biofilms in oxytetracycline photodegradation

Environmental Science and Pollution Research International
Xiuyi HuaZhiyong Guo

Abstract

Dissolved organic matter (DOM) is one of the most important factors that influence the photodegradation of antibiotics in the aquatic environment. However, the mechanisms by which DOM produced by natural biofilms (BDOM) influences photodegradation are poorly understood. Here, the influences of BDOM and fulvic acid (FA) as model DOM on the photodegradation of the antibiotic oxytetracycline (OTC) were investigated, and the differences between the characteristics of BDOM and FA were determined by ultraviolet, infrared, and three-dimensional fluorescence spectrum analyses. In addition, an experiment on the scavengers of reactive oxygen species (ROS) was also conducted to explore related mechanisms. The results indicated that the aromaticity degree and molecular weight of BDOM were lower than those of FA. The OTC photodegradation rates increased from 9.7 × 10-2 to 19.9 × 10-2 min-1 with increasing BDOM concentration, while they decreased from 8.9 × 10-2 to 5.6 × 10-2 min-1 with increasing FA concentration. Excited triplet-state BDOM (3BDOM*) and singlet oxygen (1O2) simultaneously promoted the photodegradation of H2OTC and HOTC-. However, FA inhibited OTC photodegradation through strong light-shielding effects. These results are ben...Continue Reading

References

Aug 10, 2004·Environmental Science & Technology·Spencer S WalseJohn L Ferry
Oct 21, 2006·Environmental Science & Technology·Serge ChironDavide Vione
Sep 26, 2008·Journal of Environmental Sciences (China)·Shaojun JiaoLiangyan Chen
Jan 14, 2009·The Science of the Total Environment·A J WatkinsonS D Costanzo
Dec 24, 2009·Environmental Science & Technology·Jennifer J GuerardChristopher M Hadad
May 31, 2011·Environmental Science & Technology·Neil V Blough, Rossana Del Vecchio
May 9, 2012·Environmental Science and Pollution Research International·Xiuyi HuaZhiyong Guo
Jun 5, 2012·Journal of Environmental Sciences (China)·Yong ChenChun Hu
Jun 5, 2012·Environmental Science and Pollution Research International·Xiuyi HuaDapeng Liang
May 15, 2013·Environmental Science and Pollution Research International·Xiaoxia QuFengchang Wu
Feb 12, 2015·Environmental Science & Technology·Laleen C BodhipakshaAllison A MacKay
Dec 27, 2015·Environmental Science and Pollution Research International·Ya ZhangXi Yang
Feb 18, 2016·Environmental Science & Technology·Rui LiWeihua Song
Aug 12, 2016·Nature Reviews. Microbiology·Hans-Curt FlemmingStaffan Kjelleberg
May 13, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·N ZhangK Jiang
Dec 31, 2017·The Science of the Total Environment·Liwen ZhangZhiyong Guo

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