文献类型：期刊文献

中文题名：Identification and ecotoxicity assessment of intermediates generated during the degradation of clofibric acid by advanced oxidation processes

英文题名：Identification and ecotoxicity assessment of intermediates generated during the degradation of clofibric acid by advanced oxidation processes

作者：Wenzhen LI[2];Yu DING[2];Qian SUI[1];Shuguang LU[1];Zhaofu QIU[1];Kuangfei LIN[1]

机构：[1]State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process,Shanghai Key Laboratory of Functional Materials Chemistry,East China University of Science and Technology,Shanghai 200237,China;[2]Datang Energy Corporation,Hulunbeier 021008,China

年份：2012

卷号：6

期号：4

起止页码：445

中文期刊名：Frontiers of Environmental Science & Engineering

外文期刊名：环境科学与工程前沿（英文）

收录：Scopus;CSCD:【CSCD2011_2012】；

基金：This study was supported by the National Natural Science Foundation of China （Grant Nos. 20677015 and 40871223）, the National High Technology Research and Development Program of China （No. 2007AA06Z331）, the Chinese Shanghai Leading Academic Discipline Project （B506） and National Post-Doctoral Science Foundation （No. 2011M500071）.

语种：英文

中文关键词：clofibric acid;advanced oxidation processes;intermediates;toxicity;Photobacterium phosphoreum T3 spp.

外文关键词：clofibric acid, advanced oxidation processes, intermediates, toxicity, Photobacterium phosphoreum T3 spp.

摘要：The aim of this study was to identify the intermediates in clofibric acid degradation under various advanced oxidation processes, namely ultraviolet （UV）, UV/H2O2, vacuum ultraviolet （VUV）, VUV/H2O2, and solar/TiO2 processes, as well as to assess the toxicity of these intermediates. Eleven intermediates have been detected by gas chromatography-mass spectrometer, most of which were reported for the first time to our best knowledge. Combining the evolution of the dissolved organic carbon, CF and specific ultraviolet absorption at 254 nm, it could be deduced that cleavage of aromatic ring followed by dechlorination was the mechanism in solar/ TiO2 process, while dechlorination happened first and accumulation of aromatic intermediates occurred in the other processes. Different transformation pathways were proposed for UV-, VUV-assisted and solar/TiO2 processes, respectively. The acute toxicity was evaluated by means of Photobacterium phosphoreurn T3 spp. bioassay. It was believed that aromatic intermediates increased the toxicity and the ring-opening pathway in solar/TiO2 process could relieve the toxicity.
The aim of this study was to identify the intermediates in clofibric acid degradation under various advanced oxidation processes, namely ultraviolet （UV）, UV/H2O2, vacuum ultraviolet （VUV）, VUV/H2O2, and solar/TiO2 processes, as well as to assess the toxicity of these intermediates. Eleven intermediates have been detected by gas chromatography-mass spectrometer, most of which were reported for the first time to our best knowledge. Combining the evolution of the dissolved organic carbon, CF and specific ultraviolet absorption at 254 nm, it could be deduced that cleavage of aromatic ring followed by dechlorination was the mechanism in solar/ TiO2 process, while dechlorination happened first and accumulation of aromatic intermediates occurred in the other processes. Different transformation pathways were proposed for UV-, VUV-assisted and solar/TiO2 processes, respectively. The acute toxicity was evaluated by means of Photobacterium phosphoreurn T3 spp. bioassay. It was believed that aromatic intermediates increased the toxicity and the ring-opening pathway in solar/TiO2 process could relieve the toxicity.