(请使用IE浏览器访问本系统)

  学科分类

  基础科学

  工程技术

  生命科学

  人文社会科学

  其他

篇目详细内容

【篇名】 Identification and ecotoxicity assessment of intermediates generated during the degradation of clofibric acid by advanced oxidation processes
【刊名】 Frontiers of Environmental Science and Engineering
【刊名缩写】 Front.Environ.Sci.Eng.
【ISSN】 2095-2201
【EISSN】 2095-221X
【DOI】 10.1007/s11783-012-0419-6
【出版社】 Higher Education Press and Springer-Verlag Berlin Heidelberg
【出版年】 2012
【卷期】 6 卷4期
【页码】 445-454 页,共 10 页
【作者】 Wenzhen LI; Yu DING; Qian SUI; Shuguang LU; Zhaofu QIU; Kuangfei LIN;
【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, Cl? 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 phosphoreum 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.
版权所有 © CALIS管理中心 2008