%0 Journal Article
%T Photocatalytic degradation of 4-tert-octylphenol in a spiral photoreactor system
%A Yanlin Wu
%A Haixia Yuan
%A Xiaoxuan Jiang
%A Guanran Wei
%A Chunlei Li
%A Wenbo Dong
%A <br>Yanlin Wu
%A Haixia Yuan
%A Xiaoxuan Jiang
%A Guanran Wei
%A Chunlei Li
%A Wenbo Dong
%J 环境科学学报(英文版)
%D 2012
%I 
%X A spiral photoreactor system (SPS) was developed for the degradation of 4-tert-octylphenol (4-t-OP) in aqueous phase. 4-t-OP was previously considered as a endocrine disrupting compound frequently present in water. The direct photodegradation reaction caused by the SPS was found to accord with the characteristic of apparent first-order reaction with reaction rate constantk= 4.8 × 10-2 min-1. However, the direct photodegradation reaction could not make the 4-t-OP mineralized. The photodegradation efficiency increased from 88% to 91.2% in 45 min irradiation period after the internal surface of SPS was sintered with TiO2 thin film as catalyst. Catalyst concentration, number of catalyst coating layers and initial concentration of 4-t-OP were proven to be the factors affecting the photocatalytic degradation performance of the SPS on aqueous 4-t-OP. The degradation mechanism was investigated and the byproducts were analyzed using total organic carbon analyzer (TOC) and LC-MS. The possible chemical structures of the products were suggested. SPS with single layer of TiO2 prepared by sintering 13.6% of TiO2 precursor was proven to be more efficient than most of previous systems for removal of 4-t-OP from aqueous phase. 28.3% of the 4-t-OP was mineralized in 45 min according to the decreased amount of TOC value.
%K spiral photoreactor system
%K UV light
%K 4-t-OP
%K photocatalytic degradation
%K TiO2<br>spiral
%K photoreactor
%K system
%K UV
%K light
%K 4-t-OP
%K photocatalytic
%K degradation
%K TiO2
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=6CB1530875F53489BF1E81BD87B7F5E6&aid=22653CDAF59BBDC18C527E05BA981E8A&yid=99E9153A83D4CB11&vid=B91E8C6D6FE990DB&iid=9CF7A0430CBB2DFD&sid=0C0A5470C59ABA43&eid=380BA99738E9DB23&journal_id=1001-0742&journal_name=Journalofenvironmentalsciences(China)&referenced_num=0&reference_num=28