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论文类型：期刊论文

发表时间：2015-11-01

发表刊物：CHEMOSPHERE

收录刊物：SCIE、EI、PubMed、Scopus

卷号：138

页面范围：792-797

ISSN号：0045-6535

关键字：Antiviral drug; Photolysis; Aquatic environment; Photosensitizer

摘要：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 O-1(2) (k(102)) and (OH)-O-center dot (k(OH)) were also measured. These results are important for fate and ecological risk assessment of the antiviral drugs in natural waters. (C) 2015 Elsevier Ltd. All rights reserved.