Photocatalytic degradation of phenanthrene on soil surfaces in the presence of nanometer anatase TiO sub(2) under UV-light

The effect of nanometer anatase TiO sub(2) 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 TiO sub(2) (0 wt.%, 1 wt.%, 2 wt.%, 3 wt.%, and 4 wt.%) we...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2012-12, Vol.24 (12), p.2122-2126
Main Authors: Gu, Jiali, Dong, Dianbo, Kong, Lingxue, Zheng, Yong, Li, Xiaojun
Format: Article
Language:English
Subjects:
Anatase
China
Degradation
Humic acids
Phenanthrene
Photocatalysis
Soil (material)
Titanium dioxide
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Summary:The effect of nanometer anatase TiO sub(2) 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 TiO sub(2) (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. TiO sub(2) significantly accelerated the degradation of phenanthrene with the half-life reduced from 45.90 to 31.36 hr for TiO sub(2) loading of 0 wt.% and 4 wt.%, respectively. In addition, the effects of H sub(2)O sub(2), light intensity and humic acid on the degradation of phenanthrene were investigated. The degradation of phenanthrene increased with the concentration of H sub(2)O sub(2), light intensity and the concentration of humic acids. It has been demonstrated that the photocatalytic method in the presence of nanometer anatase TiO sub(2) was a very promising technology for the treatments of soil polluted with organic substances in the future.
ISSN:1001-0742