Investigation on the photocatalytic degradation of pyrene on soil surfaces using nanometer anatase TiO2 under UV irradiation

被引：88

作者：

Dong, Dianbo ^{[1
,2
]}

Li, Peijun ^{[1
]}

Li, Xiaojun ^{[1
]}

Zhao, Qing ^{[1
,2
]}

Zhang, Yinqiu ^{[1
,2
]}

Jia, Chunyun ^{[1
]}

Li, Peng ^{[2
,3
]}

机构：

[1] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China

[2] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[3] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 174卷 / 1-3期

基金：

国家高技术研究发展计划(863计划);

关键词：

Nanometer anatase TiO2; Photocatalytic degradation; Pyrene; Soil surfaces; UV irradiation; POLYCYCLIC AROMATIC-HYDROCARBONS; HUMIC SUBSTANCES; PHOTODEGRADATION; PHOTOLYSIS; PHENANTHRENE; MOISTURE; ATRAZINE; NANOPARTICLES; CARBOFURAN; POLLUTANTS;

D O I：

10.1016/j.jhazmat.2009.09.132

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photocatalytic degradation of pyrene on soil surfaces was investigated in the presence of nanometer anatase TiO2 under a variety of conditions. After being spiked with pyrene, soil samples loaded with different amounts of TiO2 (0%, 1%, 2%. 3%, and 4%, w/w) were exposed to UV irradiation for 25 h. The results indicated that the photocatalytic degradation of pyrene followed pseudo-first-order kinetics. TiO2 accelerated the degradation of pyrene generally as indicated by the half-life reduction from 45.90 to 31.36 h, corresponding to the TiO2 amounts from 0% to 4%, respectively. The effects of H2O2, light intensity and humic acids on the degradation of pyrene were also investigated. The degradation of pyrene increased along with increasing the concentration of H2O2, light intensity and the concentration of humic acids. All results indicated that the photocatalytic method in the presence of nanometer anatase TiO2 was an advisable choice for the treatments of PAHs polluted soil in the future. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：859 / 863

页数：5

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