文献类型：期刊文献

英文题名：Chemical and toxicological evaluation of an emerging pollutant (enrofloxacin) by catalytic wet air oxidation and ozonation in aqueous solution

作者：Li, Yan[1];Zhang, Feifang[1];Liang, Xinmiao[1,3];Yediler, Ayfer[2]

机构：[1]E China Univ Sci & Technol, Sch Pharm, Shanghai 200237, Peoples R China;[2]German Res Ctr Environm Hlth GmbH, Helmholtz Zentrum Munchen, Inst Ecol Chem, D-85764 Neuherberg, Germany;[3]Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China

年份：2013

卷号：90

期号：2

起止页码：284

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20124815730759);WOS:【SCI-EXPANDED(收录号:WOS:000312618300020)】；

基金：This study (Project-No. CHN 08/052) was supported by the German Federal Ministry of Education and Research (BMBF) and the Chinese Academy of Sciences. Moreover, financial support was partly given by the National Natural Science Foundation of China (No. 21177040), the Ministry of Science and Technology of China (No. 2011BAK10B04) National High Technology Research and Development Program of China (No. 2008AA06Z306). Authors greatly appreciate the valuable assistance of Dongmei Fu, Lianzhi Wang and Xiaofeng Zhao, Maria Magdalena Bobu and Jurgen Maguhn.

语种：英文

外文关键词：Catalytic wet air oxidation; Ozonation; Enrofloxacin; Degradation products; Bioluminescence test

摘要：This study evaluates the degradation efficiency of enrofloxacin (ENR) by catalytic wet air oxidation (CWAO) and ozonation. Results obtained by CWAO experiments show that 99.5% degradation, 37.0% chemical oxidation demand (COD) removal and 51.0% total organic carbon (TOC) conversion were obtained when 100 mol% FeCl3 and 25 mol% NaNO2 at 150 degrees C under 0.5 MPa oxygen pressure after 120 min are used. The degradation products are identified by liquid chromatography-tandem mass spectrometry (LC-MS/MS), gas chromatography-mass spectrometry (GC-MS) and ion chromatography (IC). The oxidation end products, F-, NO3- and NH4+ were determined by IC. The BOD5/COD ratio as a measure of the biodegradability of the parent compound increased from 0.01 to 0.12 after 120 min of reaction time, indicating an improved biodegradability of the parent compound. The inhibition of bioluminescence of the marine bacteria V. fischeri decreased from 43% to 12% demonstrating a loss in toxicity of ENR during CWAO. Ozonation of 0.2 mM ENR was carried out with an ozone concentration of 7.3 g m(-3) at pH 7. ENR decomposition with a degradation rate of 87% was obtained corresponding to the reaction time. Moderate changes in COD (18%) and TOC (17%) removal has been observed. The bioluminescence inhibition increased from 8% to 50%, due to the generation of toxic degradation products during ozonation. In comparison to the widely use of well developed method of ozonation CWAO exhibits better performance in terms of COD, TOC removals and generates less toxic products. (C) 2012 Elsevier Ltd. All rights reserved.