The role of UV-B on the degradation of PCDD/Fs and PAHs sorbed on surfaces of spruce (Picea abies (L.) Karst.) needles.
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.
Niu
Junfeng
J
Department of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, PR China.
Chen
Jingwen
J
Martens
D
D
Henkelmann
B
B
Quan
Xie
X
Yang
Fenglin
F
Seidlitz
H K
HK
Schramm
K-W
KW
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
D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; D011084:Polycyclic Aromatic Hydrocarbons; D012989:Soil Pollutants