Author(s): Jiali Gu 1, Dianbo Dong 2, Lingxue Kong 3, Yong Zheng 4, Xiaojun Li 5 1.College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Jinzhou 121013, China 2.Liaoning Academy of Environmental Sciences, Shenyang 110031, China 3.Institute for Frontier Materials, Deakin University, Geelong Vic 3217, Australia 4.Liaoning University, Shenyang 110136, China 5.Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
Pages: 2122-2126
Year: 2012 Issue:  12
Journal: Journal of Environmental Sciences
Keyword:  nanometer anatase TiO2;  photocatalytic degradation;  phenanthrene;  soil surfaces;  UV-light;
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(0wt.%,1wt.%,2wt.%,3wt.%,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 31.36hr for TiO2 loading of 0wt.% and 4wt.%,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.