PCDDs/DFs emissions from crematories in Japan.
Concentrations of PCDDs and PCDFs in emission gases from 10 crematories were measured. The relationship between PCDDs/DFs and several factors such as structure, equipment and operational state of the crematory is discussed. Furthermore, emission of PCDDs/DFs from all crematories in Japan is estimated. The following results are obtained: (1) total concentration of PCDDs/DFs was 2.2-290 ng/N m3, whose TEQ concentration was 0.0099-6.5 ng TEQ/N m3; (2) total concentration of PCDFs was higher than that of PCDDs; (3) T4CDFs was the highest in the homologue pattern and 2,3,7,8-T4CDF was the highest in the isomer pattern; (4) emission of PCDDs/DFs was the largest in the first 20 min of cremation; (5) concentration of PCDDs/DFs was related to the existence of a secondary combustion chamber and a dust collector, and the ratio of the numbers of main and secondary combustion chambers; (6) total emission of PCDDs/DFs from crematories in Japan was estimated to be 8.9 g TEQ/yr.
Takeda
N
N
Graduate School of Engineering, Kyoto University, Japan.
Takaoka
M
M
Fujiwara
T
T
Takeyama
H
H
Eguchi
S
S
D000367:Age Factors; D000393:Air Pollutants / Q000032:analysis*; D001572:Benzofurans / Q000032:analysis; D002248:Carbon Monoxide / Q000032:analysis; D000072338:Dibenzofurans, Polychlorinated; D004391:Dust; D006801:Humans; D017745:Incineration; D007564:Japan; D009027:Mortuary Practice / Q000295:instrumentation / Q000379:methods*; D010100:Oxygen / Q000032:analysis; D000072317:Polychlorinated Dibenzodioxins / Q000031:analogs & derivatives* / Q000032:analysis; D012737:Sex Factors; D013696:Temperature; D013997:Time Factors
D000393:Air Pollutants; D001572:Benzofurans; D000072338:Dibenzofurans, Polychlorinated; D004391:Dust; D000072317:Polychlorinated Dibenzodioxins; D002248:Carbon Monoxide; D010100:Oxygen