| Summary: | 碩士 === 國立嘉義大學 === 水產生物學系研究所 === 96 === Both Enrofloxacin (ENR) and Ciprofloxacin (CIP) are Fluoroquinolone Antibiotics. They are applied in human, agricultural, and veterinary practices to control diseases. The antibiotics may enter aquatic environments through many channels and resistant bacteria and may indirectly result in adverse effects on human health.
Effects of light（nature light and dark） and microbial activity on the degradation of ENR and CIP in aquaculture pond waters and sediment slurries were studied in this research. ENR and CIP were amended with 10 mg l-1 into waters and sediment slurries, and incubated under different light sources (natural light and artificial light), microbial activity (sterile and non-sterile) and oxygen effect （aerobic and anaerobic）. Furthermore, this research will discuss the microorganism acclimation of two kinds of antibiotics and the relationship between the ENR converted to CIP in aquaculture pond waters and sediment slurries.
Results show that ENR and CIP decayed faster under light conditions than under dark conditions and in waters than in sediment slurries. In different wavebands of ultraviolet and visible radiation, the degradation of ENR and CIP in each waters and sediments sample was faster under UVB than under UVA, UVC and FL. Under these treatments of different light sources, ENR would be converted to CIP. Concerning the biodegradation of ENR or CIP, it was not found in aquaculture pond waters, but it was found in sediment slurries. After re-amendment, biodegradation of ENR and CIP was faster in sediment slurries. No differences in ENR and CIP degradation were found between aerobic and anaerobic incubation. Results show the light is the main reason that could accelerate the degradation of ENR and CIP in aquaculture pond waters and sediments.
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