Document Detail


Photochemical degradation of ciprofloxacin in UV and UV/H(2)O (2) process: kinetics, parameters, and products.
MedLine Citation:
PMID:  23054793     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Photochemical degradation of fluoroquinolone ciprofloxacin (CIP) in water by UV and UV/H(2)O(2) were investigated. The degradation rate of CIP was affected by pH, H(2)O(2) dosage, as well as the presence of other inorganic components. The optimized pH value and H(2)O(2) concentration were 7.0 and 5 mM. Carbonate and nitrate both impeded CIP degradation. According to liquid chromatography-tandem mass spectrometry analysis, four and 16 products were identified in UV and UV/H(2)O(2) system, respectively. Proposed degradation pathways suggest that reactions including the piperazinyl substituent, quinolone moiety, and cyclopropyl group lead to the photochemical degradation of CIP. Toxicity of products assessed by Vibrio qinghaiensis demonstrated that UV/H(2)O(2) process was more capable on controlling the toxicity of intermediates in CIP degradation than UV process.
Authors:
Hong-Guang Guo; Nai-Yun Gao; Wen-Hai Chu; Lei Li; Yong-Ji Zhang; Jin-Shan Gu; Yu-Liang Gu
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-10-11
Journal Detail:
Title:  Environmental science and pollution research international     Volume:  -     ISSN:  1614-7499     ISO Abbreviation:  Environ Sci Pollut Res Int     Publication Date:  2012 Oct 
Date Detail:
Created Date:  2012-10-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9441769     Medline TA:  Environ Sci Pollut Res Int     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai, 200092, China.
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