Photocatalytic degradation of phenanthrene on soil surfaces in the presence of nanometer anatase TiO_2 under UV-light  

作　　者：Jiali Gu Dianbo Dong Lingxue Kong Yong Zheng Xiaojun Li 

机构地区：[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

出　　处：《Journal of Environmental Sciences》2012年第12期2122-2126,共5页环境科学学报（英文版）

基　　金：supported by the Open Foundation of Key Laboratory of Industrial Ecology and Environmental Engineering (No. KLIEEE-09-04);the Liaoning Doctoral Funds (No. 20111076)

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 H202, light intensity and humic acid on the degradation of phenanthrene were investigated. The degradation of phenanthrene increased with the concentration of H202, 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.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 H202, light intensity and humic acid on the degradation of phenanthrene were investigated. The degradation of phenanthrene increased with the concentration of H202, 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.

关 键 词：nanometer anatase Ti02 photocatalytic degradation PHENANTHRENE soil surfaces UV-LIGHT 

分 类 号：X703[环境科学与工程—环境工程] TB383[一般工业技术—材料科学与工程]