title: Photolysis of three antiviral drugs acyclovir, zidovudine and lamivudine in surface freshwater and seawater.
abstract: Photodegradation is an important elimination process for many pharmaceuticals in surface waters. In this study, photodegradation of three antiviral drugs, acyclovir, zidovudine, and lamivudine, was investigated in pure water, freshwater, and seawater under the irradiation of simulated sunlight. Results showed that zidovudine was easily transformed via direct photolysis, while acyclovir and lamivudine were mainly transformed via indirect photolysis. We found that in freshwater, nitrate enhanced the photodegradation of the three antiviral drugs, bicarbonate promoted the photodegradation of acyclovir, and dissolved organic matter (DOM) accelerated the photolysis of acyclovir and lamivudine. In seawater, the photolysis of acyclovir was not susceptible to Cl(-), Br(-) and ionic strength; however, the photolysis of zidovudine was inhibited by Cl(-) and Br(-), and the photolysis of lamivudine was enhanced by Cl(-), Br(-) and ionic strength. Second-order reaction rate constants for the three antiviral drugs with (1)O2 (k1O2) and OH (kOH) were also measured. These results are important for fate and ecological risk assessment of the antiviral drugs in natural waters.
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
authors: Chengzhi
authors: C
authors: Zhou
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China. Electronic address: jwchen@dlut.edu.cn.
authors: Jingwen
authors: J
authors: Chen
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
authors: Qing
authors: Q
authors: Xie
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
authors: Xiaoxuan
authors: X
authors: Wei
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
authors: Ya-nan
authors: YN
authors: Zhang
authors: Key Laboratory of Industrial Ecology and Environmental Engineering (MOE), School of Environmental Science and Technology, Dalian University of Technology, Linggong Road 2, Dalian 116024, China.
authors: Zhiqiang
authors: Z
authors: Fu
mesh_terms: D000212:Acyclovir / Q000032:analysis / Q000528:radiation effects; D000998:Antiviral Agents / Q000032:analysis* / Q000528:radiation effects; D005618:Fresh Water / Q000737:chemistry*; D019259:Lamivudine / Q000032:analysis / Q000528:radiation effects; D008962:Models, Theoretical; D009566:Nitrates / Q000737:chemistry; D010084:Oxidation-Reduction; D010782:Photolysis; D018570:Risk Assessment; D012623:Seawater / Q000737:chemistry*; D013472:Sunlight; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000528:radiation effects; D015215:Zidovudine / Q000032:analysis / Q000528:radiation effects
chemical_list: D000998:Antiviral Agents; D009566:Nitrates; D014874:Water Pollutants, Chemical; D019259:Lamivudine; D015215:Zidovudine; D000212:Acyclovir
keywords: Antiviral drug; Aquatic environment; Photolysis; Photosensitizer