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Photodegradation of PCDD/Fs adsorbed on spruce (Picea abies [L.] Karst.) needles under sunlight irradiation.
Chemosphere 50, 1217-1225 (2003)
Spruce (Picea abies (L.) Karst.) needles were exposed to exhaust gas containing polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) generated by combustion of polyvinyl chloride, wood, high-density polyethylene, and styrene. Photodegradation of PCDD/Fs adsorbed on spruce needles under sunlight irradiation was studied. The photodegradation of PCDD/Fs follows pseudo-first-order reaction kinetics, with photolysis half-lives ranging between 40 and 100 h. The photolysis rates of PCDF congeners are higher than PCDD congeners with the same chlorinated substitutions. Higher chlorinated PCDD/Fs tend to photolyze slowly. The wax components in spruce needles may act as proton donors and accelerate the photolysis rate. C–Cl cleavage through the addition of protons to PCDD/F molecules may be an important route for PCDD/Fs photodegradation.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
Photodegradation; PCDD/Fs; Spruce needles; Sunlight irradiation
ISSN (print) / ISBN
0045-6535
e-ISSN
1879-1298
Journal
Chemosphere
Quellenangaben
Volume: 50,
Issue: 9,
Pages: 1217-1225
Publisher
Elsevier
Publishing Place
Kidlington, Oxford
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Institute of Ecological Chemistry (IOEC)