| 光谱学与光谱分析 |
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| Combined Application of Multiple Fluorescence in Research on the Degradation of Fluoranthene by Potassium Ferrate |
| LI Si1, 2, YU Dan-ni1, JI Fang-ying1, ZHOU Guang-ming3, HE Qiang1* |
1. Key Laboratory of the Three Gorges Reservoir Region’s Eco-environment, Ministry of Education,Chongqing University, Chongqing 400045, China
2. School of Civil Engineering, Chongqing University, Chongqing 400045, China
3. School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China |
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Abstract The degradation of fluoranthene was researched by combined means of multiple fluorescence spectra, including emission, synchronous, excitation emission matrix (EEM), time-scan and photometry. The characteristics of the degradation and fluoranthene molecular changes within the degradation’s process were also discussed according to the information about the degradation provided by all of the fluorescence spectra mentioned above. The equations of fluoranthene’s degradation by potassium ferrate were obtained on the bases of fitting time-scan fluorescence curves at different time, and the degradation’s kinetic was speculated accordingly. From the experimental results, multiple fluorescence data commonly reflected that it had same degradation rate at the same reaction time. t=10 s, and the degradation rate is ～55%, t=25 s, ～81%, t=40 s, ～91%. No new fluorescent characteristic was observed within every degradation’ stage. The reaction stage during t≤20 s was crucial, in which the degradation process is closest to linear relationship. After this beginning stage, the linear relationship deviated gradually with the development of the degradation process. The degradation of fluoranthene by potassium ferrate was nearly in accord with the order of the first order reaction.
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Received: 2012-03-28
Accepted: 2012-05-20
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Corresponding Authors:
HE Qiang
E-mail: hp0980@126.com
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