Photocatalytic degradation of phenanthrene and pyrene on soil surfaces in the presence of nanometer rutile TiO2 under UV-irradiation

被引：89
|
作者：
Dong, Dianbo [1 ,2 ]
Li, Peijun [1 ]
Li, Xiaojun [1 ]
Xu, Chengbin [3 ]
Gong, Dawei [4 ]
Zhang, Yinqiu [1 ,2 ]
Zhao, Qing [1 ,2 ]
Li, Peng [2 ,5 ]
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] Liaoning Univ, Sch Environm Sci, Shenyang 110036, Peoples R China
[4] Liaoning Prov Ctr Dis Control & Prevent, Shenyang 110005, Peoples R China
[5] Chinese Acad Sci, Fujian Inst Res Struct Matter, Fuzhou 350002, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2010年 / 158卷 / 03期
基金：
国家高技术研究发展计划(863计划); 中国国家自然科学基金;
关键词：
Nanometer rutile TiO2; Photocatalytic degradation; Phenanthrene; Pyrene; Soil surfaces; UV-irradiation; POLYCYCLIC AROMATIC-HYDROCARBONS; HUMIC SUBSTANCES; PHOTODEGRADATION; PHOTOLYSIS; MOISTURE; ATRAZINE; ACID; PHOTOCHEMISTRY; MINERALIZATION; NANOPARTICLES;
D O I：
10.1016/j.cej.2009.12.046
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 phenanthrene and pyrene on soil surfaces in the presence of nanometer rutile TiO2 was investigated. After being spiked with phenanthrene and pyrene, soil samples loaded with different dosages of nanometer futile TiO2 (0, 1, 2, 3, and 4 wt%) were exposed to UV-irradiation for 25 h. The results indicated that the photocatalytic degradation of phenanthrene and pyrene followed the pseudo-first-order kinetics. The catalyst dosage of 2 wt% was chosen as the optimal one for further studies. According to the half-life, the degradation rate of the phenanthrene and pyrene on soil surfaces was related to their absorption spectra in soil and oxidation-half-wave-potential. In addition, the degradation of phenanthrene and pyrene increased along with increasing H2O2, light intensity and humic acids. All results indicated that the photocatalytic method in the presence of nanometer rutile TiO2 was an advisable choice for the treatments of PAHs polluted soil in the future. (C) 2010 Elsevier By. All rights reserved.
引用
收藏
页码：378 / 383
页数：6
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