title: The role of UV-B on the degradation of PCDD/Fs and PAHs sorbed on surfaces of spruce (Picea abies (L.) Karst.) needles.
abstract: Photodegradation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) and polycyclic aromatic hydrocarbons (PAHs) sorbed on surfaces of spruce (Picea abies (L.) Karst.) needles was investigated. The role of sunlight and, in particular, the role of short wavelength UV-B radiation were studied in a sun simulator under controlled environmental conditions. The photodegradation of PCDD/Fs and PAHs follows first-order kinetics. Simulated sunlight containing UV-B induced two phases of photodegradation kinetics for PCDD/Fs, whereas no distinct phases of the kinetics were observed for PAHs. UV-B radiation plays a much more important role on the photodegradation for PCDD/Fs than that for PAHs. Direct photolysis dominates the photodegradation of PCDD/Fs and PAHs.
authors.affiliation: Department of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Niu
authors.forename: Jingwen
authors.initials: J
authors.lastname: Chen
authors.forename: D
authors.initials: D
authors.lastname: Martens
authors.forename: B
authors.initials: B
authors.lastname: Henkelmann
authors.forename: Xie
authors.initials: X
authors.lastname: Quan
authors.forename: Fenglin
authors.initials: F
authors.lastname: Yang
authors.forename: H K
authors.initials: HK
authors.lastname: Seidlitz
authors.forename: K-W
authors.initials: KW
authors.lastname: Schramm
mesh_terms: D000327:Adsorption; D001572:Benzofurans / Q000032:analysis / Q000737:chemistry*; D000072338:Dibenzofurans, Polychlorinated; D007700:Kinetics; D010782:Photolysis; D028222:Picea / Q000737:chemistry*; D018515:Plant Leaves / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis / Q000737:chemistry*; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis / Q000737:chemistry*; D012989:Soil Pollutants / Q000032:analysis; D014466:Ultraviolet Rays
chemical_list: D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants