Degradation of Ciprofloxacin and Chloramphenicol by Zinc Oxide

• Main Authors: Cheng Hung Lee, 李政鴻
• Other Authors: C. C. Lin
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/z7g8pj

碩士 === 長庚大學 === 化工與材料工程學系 === 104 === This study evaluates the efficiency of degradation of antibiotic ciprofloxacin and chloramphenicol by ZnO/UV process. The effects of UV wavelength, ZnO dosage, pH, and initial concentration of antibiotics on this process were investigated. The degradation of both antibiotics by ZnO/UV process followed pseudo-first-order kinetics. The efficiency of degradation of both antibiotics under UV-254 nm exceeded that under UV-365 nm. The efficiency of degradation of both antibiotics increased with ZnO dosage but decreased with initial concentration of both antibiotics. However, an excess dosage of ZnO inhibited the degradation of both antibiotics. The efficiency of degradation of both antibiotics followed the order pH 7>pH 4>pH 10. Ciprofloxacin is easy to be degraded than chloramphenicol by ZnO/UV process owing to the fact that there were chlorine ions during the degradation of chloramphenicol. At pH 7 and UV-254 nm, the complete degradation of ciprofloxacin (5 mg/L) was achieved using a ZnO dosage of 0.5 g/L in 80 min. At pH 7 and UV-254 nm, the complete degradation of chloramphenicol (5 mg/L) was achieved using a ZnO dosage of 0.7 g/L in 90 min.