| Photocatalytic degradation of phenanthrene on soil surfaces in the presence of nanometer anatase TiO2 under UV-light |
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| 作者姓名： | Jiali Gu Dianbo Dong Lingxue Kong Yong Zheng Xiaojun Li |
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| 作者单位： | College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China;Liaoning Academy of Environmental Sciences, Shenyang 110031, China;Institute for Frontier Materials, Deakin University, Geelong Vic 3217, Australia;Liaoning University, Shenyang 110136, China;Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
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| 基金项目： | This work was supported by the Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering (No. KLIEEE-09-04) and the Liaoning Doctoral Funds (No. 20111076). |
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| 摘 要： | The effect of nanometer anatase TiO2 was investigated on the photocatalytic degradation of phenanthrene on soil surfaces under a variety of conditions. After being spiked with phenanthrene, soil samples loaded with different amounts of TiO2 (0 wt.%, 1 wt.%, 2 wt.%, 3 wt.%, and 4 wt.%) were exposed to UV-light irradiation for 25 hr. The results indicated that the photocatalytic degradation of phenanthrene followed the pseudo first-order kinetics. TiO2 significantly accelerated the degradation of phenanthrene with the half-life reduced from 45.90 to 31.36 hr for TiO2 loading of 0 wt.% and 4 wt.%, respectively. In addition, the effects of H2O2, light intensity and humic acid on the degradation of phenanthrene were investigated. The degradation of phenanthrene increased with the concentration of H2O2, light intensity and the concentration of humic acids. It has been demonstrated that the photocatalytic method in the presence of nanometer anatase TiO2 was a very promising technology for the treatments of soil polluted with organic substances in the future.
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| 关 键 词： | nanometer anatase TiO2 photocatalytic degradation phenanthrene soil surfaces UV-light |
| 收稿时间： | 14 February 2012 |
| 修稿时间： | 4/9/2012 12:00:00 AM |
Photocatalytic degradation of phenanthrene on soil surfaces in the presence of nanometer anatase TiO2 under UV-light |
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| Jiali Gu,Dianbo Dong,Lingxue Kong,Yong Zheng,Xiaojun Li.Photocatalytic degradation of phenanthrene on soil surfaces in the presence of nanometer anatase TiO2 under UV-light[J].Journal of Environmental Sciences,2012,24(12):2122-2126. |
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| Authors: | Jiali Gu Dianbo Dong Lingxue Kong Yong Zheng and Xiaojun Li |
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| Institution: | College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China;Liaoning Academy of Environmental Sciences, Shenyang 110031, China;Institute for Frontier Materials, Deakin University, Geelong Vic 3217, Australia;Liaoning University, Shenyang 110136, China;Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China |
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| Abstract: | The effect of nanometer anatase TiO2 was investigated on the photocatalytic degradation of phenanthrene on soil surfaces under a variety of conditions. After being spiked with phenanthrene, soil samples loaded with different amounts of TiO2 (0 wt.%, 1 wt.%, 2 wt.%, 3 wt.%, and 4 wt.%) were exposed to UV-light irradiation for 25 hr. The results indicated that the photocatalytic degradation of phenanthrene followed the pseudo first-order kinetics. TiO2 significantly accelerated the degradation of phenanthrene with the half-life reduced from 45.90 to 31.36 hr for TiO2 loading of 0 wt.% and 4 wt.%, respectively. In addition, the effects of H2O2, light intensity and humic acid on the degradation of phenanthrene were investigated. The degradation of phenanthrene increased with the concentration of H2O2, light intensity and the concentration of humic acids. It has been demonstrated that the photocatalytic method in the presence of nanometer anatase TiO2 was a very promising technology for the treatments of soil polluted with organic substances in the future. |
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| Keywords: | nanometer anatase TiO2 photocatalytic degradation phenanthrene soil surfaces UV-light |
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