PCDDs/DFs emissions from crematories in Japan
2000; Elsevier BV; Volume: 40; Issue: 6 Linguagem: Inglês
10.1016/s0045-6535(99)00232-5
ISSN1879-1298
AutoresNobuo Takeda, Masaki Takaoka, Takeshi Fujiwara, Hisayuki Takeyama, Shoji Eguchi,
Tópico(s)Per- and polyfluoroalkyl substances research
ResumoConcentrations 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.
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