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Citation: FEI Xue-Ning, JIANG Yuan-Guang, LÜ Yan, ZHANG Tian-Yong. Photocatalytic Degradation of Dibutyl Phthalate in Aqueous TiO₂ Suspension[J]. Chinese Journal of Applied Chemistry, ;2006, 23(1): 59-63. shu

Photocatalytic Degradation of Dibutyl Phthalate in Aqueous TiO₂ Suspension

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a Department of Environmental and Municipal Engineering, Tianjin Institute of Urban Construction, Tianjin;
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b Department of Fine Chemicals and Engineering, School of Chemical Engineering and Technology;
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c Department of Environmental Engineering, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072

Corresponding author: ZHANG Tian-Yong,
Received Date: 27 February 2005
Available Online: 21 April 2005
Fund Project: 天津市自然科学基金资助项目(033604711) (033604711)建设部科学技术项目基金(03-2-064) (03-2-064)

The photoinduced degradation of dibutyl phthalate (DBF) with TiO₂ as the catalyst in aqueous solution was investigated under ultraviolet radiation.As a result, DBF could be degraded efficiently, and the efficiency was 80.1%.Acidity of the degradation system changed obviously during the degradation process.The initial pH of the solution was 6.0, but it decreased to 3.57 after 6 h degradation.Some photodegradation intermediates in the different photocatalytic steps were examined and analyzed by means of GC-MS.It is concluded that the photodegradation of DBP begins from the side chain and it can be decomposed to monobutyl phthalate, methyl benzoate and benzoic acid.After 6 h degradation, benzoic acid is one of the main products, which is difficult to decompose further under such experimental conditions.The probable degradation course is also brought forward in the paper.
- dibutyl phthalate,
- photocatalytic degradation,
- degradation mechanism,
- titanium dioxide
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Photocatalytic Degradation of Dibutyl Phthalate in Aqueous TiO₂ Suspension