Substance flow analysis of coplanar PCBs released from waste incineration processes |
| |
Authors: | Shin-ichi Sakai Takahiro Ukai Hiroshi Takatsuki Kazuo Nakamura Sayuri Kinoshita Takumi Takasuga |
| |
Institution: | (1) Kyoto University, Environment Preservation Center, Yoshida-Honmachi, Sakyo-ku, Kyoto 606-8501, Japan Tel. +81-75-753-7704; Fax +81-75-753-7710, JP;(2) Kyoto Municipal Government, Environment Bureau, Kyoto, Japan, JP;(3) Shimazu Techno-Research Inc., Kyoto, Japan, JP |
| |
Abstract: | Previous reports have focused on the emission of coplanar polychlorinated biphenyls (Co-PCBs) which have a toxic mechanism
similar to that of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDDs/DFs) released from municipal solid waste (MSW) incineration. Such emissions
accounted for a small percentage of all the dioxins (PCDDs/DFs and Co-PCBs) recorded at the toxicity equivalent (TEQ) level.
There is, however, very little information about Co-PCBs, such as the quantities being released and their effect on overall
environmental pollution. The aim of this research has been to clarify the substance flow of Co-PCBs from MSW incineration
processes. The results reveal that whereas the input of Co-PCBs into the MSW incineration facilities in Kyoto City was 0.13–0.29 μg-TEQ
per ton waste, the total output of Co-PCBs (the sum of Co-PCBs released from emission gas, fly ash, and bottom ash) was 4.9 μg-TEQ
per ton waste. The total output was therefore found to be higher than the total input. Over 90% of the total PCBs were decomposed
in the incineration process. In comparing the profiles of congeners and homologues, those in the MSW were found to be similar
to those detected in the atmosphere and products containing PCBs, but different from those in the MSW incineration gas.
Received: August 26, 1998 / Accepted: March 2, 1999 |
| |
Keywords: | Coplanar PCBs Municipal solid waste Substance flow analysis Toxicity equivalent PCDDs/PCDFs |
本文献已被 SpringerLink 等数据库收录! |
|