Photolysis of polycyclic aromatic hydrocarbons on soil surfaces under UV irradiation.

TitlePhotolysis of polycyclic aromatic hydrocarbons on soil surfaces under UV irradiation.
Publication TypeJournal Article
Year of Publication2013
AuthorsXu C, Dong D, Meng X, Su X, Zheng X, Li Y
JournalJournal of environmental sciences (China)
Volume25
Issue3
Pagination569-75
Date Published2013 Mar 1
Abstract

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.

DOI10.1007/s12264-013-1347-6
Alternate JournalJ Environ Sci (China)