Photolysis of polycyclic aromatic hydrocarbons on soil surfaces under UV irradiation

被引：24

作者：

Xu, Chengbin ^{[1
]}

Dong, Dianbo ^{[2
]}

Meng, Xuelian ^{[3
]}

Su, Xin ^{[4
]}

Zheng, Xu ^{[1
]}

Li, Yaoyao ^{[1
]}

机构：

[1] Liaoning Univ, Sch Environm Sci, Shenyang 110036, Peoples R China

[2] Liaoning Acad Environm Sci, Shenyang 110031, Peoples R China

[3] Liaoning Univ, Sch Pharm, Shenyang 110036, Peoples R China

[4] Shenyang Resident Audit Off Peoples Republ China, Shenyang 110013, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2013年 / 25卷 / 03期

基金：

美国国家科学基金会;

关键词：

photolysis; soil surfaces; polycyclic aromatic hydrocarbons; UV irradiation; PAHS; POLLUTION; MOISTURE; PHOTOCHEMISTRY; BIODEGRADATION; DEGRADATION; POLLUTANTS; TOXICITY; SHANGHAI; REGION;

D O I：

10.1016/S1001-0742(12)60083-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Photolysis of some polycyclic aromatic hydrocarbons (PAHs) on soil surfaces may play an important role in the fate of PAHs in the environment. Photolysis of PAHs on soil surfaces under UV irradiation was investigated. The effects of oxygen, irradiation intensity and soil moisture on the degradation of the three PAHs were observed. The results showed that oxygen, soil moisture and irradiation intensity enhanced the photolysis of the three PAHs on soil surfaces. The degradation of the three PAHs on soil surfaces is related to their absorption spectra and the oxidation-half-wave potential. The photolysis of PAHs on soil surfaces in the presence of oxygen followed pseudo first-order kinetics. The photolysis half-lives ranged from 37.87 days for benzo[a]pyrene to 58.73 days for phenanthrene. The results indicate that photolysis is a successful way to remediate PAHs-contaminated soils.

引用

页码：569 / 575

页数：7

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