Increased PCDD/F formation in the bottom ash from fires of CCA-treated wood.
Bottom ash that was the result of the combustion of chromated copper arsenate (CCA) treated wood under controlled fire conditions showed an increase of several orders of magnitude in the levels of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs), compared to that of untreated timber. Wood that has been pressure treated with CCA contains copper (II), which is known to catalyse the so-called de novo formation of PCDD/Fs. Comparable levels of PCDD/Fs would be expected in residual ash from burning CCA-treated wood in backyard fires, stoves and wood heaters, as a consequence of similar combustion conditions.
Tame
N W
NW
Process Safety and Environment Protection Group, School of Engineering, The University of Newcastle, Callaghan, NSW 2308, Australia.
Dlugogorski
B Z
BZ
Kennedy
E M
EM
D000393:Air Pollutants / Q000032:analysis*; D001149:Arsenates / Q000737:chemistry*; D001572:Benzofurans / Q000032:analysis*; D002384:Catalysis; D003300:Copper / Q000737:chemistry; D000072338:Dibenzofurans, Polychlorinated; D005390:Fires; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis*; D012037:Refuse Disposal; D014934:Wood
D000393:Air Pollutants; D001149:Arsenates; D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D000072317:Polychlorinated Dibenzodioxins; C040890:chromated copper arsenate; D003300:Copper