Chemical Characterization of PCBs and Dioxins in the Waste PCB Stockpiles

Chemical Characterization of PCBs and Dioxins in the Waste PCB Stockpiles
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废 PCB 堆中 PCB 和二恶英的化学特性

DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Yoshiro Kaburaki
Yoshiro Kaburaki
中科院分区：
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文献类型：
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作者：
Y. Noma;Y. Ishikawa;K. Nose;K. Minetomatsu;H. Takigami;S. Sakai;Shuichi Izumisawa;Yoshiro Kaburaki

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通过HRGC/HRA对废弃PCB库存中的PCB、PCDDs、PCDFs和共面PCB进行了全面、定量和同源物特定分析，并与Kanechlors等技术PCB进行了比较。废弃多氯联苯堆中多氯联苯同系物和同系物的组成与Kanechlors相似，但在某些荧光灯稳定剂填料中，低氯同系物的比例有所增加。共面PCBs在PCDDs/DFs和Co-PCBs总量中占主导地位，而PCDDs和PCDFs仅约为1/10，000。至于2，3，7，8-TCDD毒性当量（TEQ），废弃PCB库存与相应种类的Kanechlor制剂具有相似的趋势。本文重点研究了日本友商核电站事故中PCBs在使用热媒过程中的变性点，结果表明PCDFs在PCBs总量中的比例、PCDFs的毒性当量占总毒性当量的百分比以及2，3，4，7，8-PeCDF和1，2，3，4，7，8-HxCDF的毒性当量占总毒性当量的百分比均有所增加。将多氯联苯废物库存中的这些点与Kanechlor制剂进行了比较，结果表明，在将多氯联苯用作Transformer油、电容器油和加热Transformer介质后，多氯联苯没有发生变性。
PCBs, PCDDs, PCDFs, and coplanar PCBs in the waste PCB stockpiles were comprehensively, quantitatively, and congener-specifically analyzed by HRGC/HRMS, and compared to technical PCB such as Kanechlors. Composition of homologues and congeners of PCBs in the waste PCB stockpiles was almost similar to that of Kanechlors, although the ratio of low chlorinated homologues was increased in some fillers of the stabilizer for fluorescent lamp. Coplanar PCBs were dominant in the total of PCDDs/DFs and Co-PCBs, whereas PCDDs and PCDFs were only about 1/10,000. As for the 2, 3, 7, 8-TCDD toxicity equivalent (TEQ), waste PCB stockpiles have a similar trend with the corresponding kinds of Kanechlor preparations. We focused the denaturation points of PCBs occurred in the process of using heating medium reported in Yusho accident, which had shown the increase in the ratio of PCDFs to total PCBs, the percentages of TEQ of PCDFs to total TEQ, and the percentages of TEQ of 2, 3, 4, 7, 8-PeCDF and 1, 2, 3, 4, 7, 8-HxCDF to total TEQ. Those points in the waste PCB stockpiles were compared to Kanechlor preparations and it revealed that the denaturation of PCBs did not occur after having used PCBs as transformer oil, capacitor oil and heat transformer medium.