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Title: Light and microbial effect on degradation of two fluoroquinolone antibiotics in pond water and sediment
Authors: Juo-Shan Lin
Hung-Yu Pan
Shiu-Mei Liu
Hong-Thih Lai
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: ultraviolet light
Date: 2010
Issue Date: 2018-05-02T03:28:07Z
Publisher: Journal of Environmental Science and Health, Part B
Abstract: Abstract: Enrofloxacin (ENR) and ciprofloxacin (CIP) are two fluoroquinolone (FQ) antibiotics widely used to treat diseases of human beings and cultured animals. These two FQs are usually detected in the effluent of municipal sewage plants and related aquatic environments. The purpose of this study was to understand the fates of ENR and CIP in aquaculture pond water and a sediment slurry in a laboratory-scale experiment. Effects of light and microbial activity on the degradation of these two FQs were investigated. Results indicated that natural irradiation plays a major role in the degradation of ENR and CIP in pond water and the sediment slurry. The 50 % dissipation times (DT50) with non-sterile treatment were 0.01 and 18.4 d for ENR, and 0.04 and 17.3 d for CIP in the water and sediment slurry, respectively. On the other hand, the degradation of ENR and CIP under dark conditions was slow or even hindered, and all of their DT50 values exceeded 100 d. These two FQs degraded faster in the sediment slurry than in pond water under dark conditions. Artificial ultraviolet (UV) and fluorescence light had similar effects on the degradation of ENR in the pond water and sediment slurry. Degradation of CIP was faster with UV than with fluorescence light treatment, while no such difference was found for ENR degradation. CIP was a degradation product of ENR under both light and dark conditions, and DT50 values for both compounds were shorter in the presence of light. The phenomenon of biodegradation was observed during degradation of CIP in the sediment slurry under natural light.
Relation: 45 pp.456-465
Appears in Collections:[Institute of Marine Biology] Periodical Articles

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