Clarification of the levels of contamination and sources by Co-PXBs as global environmental pollutants

在这份报告中，我们调查了作为环境样本的环境空气和沉积物中的Co-PXbs，以及作为生物群样本的市场食品和母乳中的Co-PXbs，以及进一步作为污染源的焚烧炉烟气中的Co-PXbs。比较了实验室条件下多溴二苯醚热解或光解生成的PCDDs/DFS、Co-PCBS、PBDDs/DFS、PXDDs/DFS和Co-PXbs对总实际浓度的贡献率，并估算了Co-PXbs污染源。在此基础上，我们试图弄清日本Co-PXbs污染的真实情况，并论证其污染源。

In this report, we investigated those of Co-PXBs in the ambient air and sediments as environmental samples, and market foods and breast milk as biota samples, and further flue gas from incinerators as contamination sources. Then, we compared each contribution ratio for total actual concentration by PCDDs/DFs, Co-PCBs, PBDDs/DFs, PXDDs/DFs and Co-PXBs formed by pyrolysis or photolysis of PBDEs in lab-scale experiment, and estimated the Co-PXBs contamination sources. On the basis of results, we tried to clarify the real situation of Co-PXBs contamination and demonstrate their contamination sources in Japan.