کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4423775 | 1308842 | 2008 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Decabromodiphenyl ether (deca-BDE) commercial mixture components, and other PBDEs, in airborne particles at a UK site Decabromodiphenyl ether (deca-BDE) commercial mixture components, and other PBDEs, in airborne particles at a UK site](/preview/png/4423775.png)
The occurrence of the major components of the decabromodiphenyl ether (deca-BDE) flame retardant and other PBDEs was investigated in daily air particulate samples from 17th April to 20th May 2004 at a semi-rural site in north-west England. BDE-209 was found at between < 0.49 and 100 pg m− 3 (median 13 pg m− 3), and other higher-brominated PBDE congeners were also found, particularly the nona-BDEs (e.g. BDE-207: < 0.042–79 pg m− 3, median 2.5 pg m− 3). Deca- and nona-BDEs dominated the median particulate sample congener profile: 60% BDE-209, 16% BDE-207, 6% BDE-208 and 4% BDE-206. Nona-BDEs were greatly enriched, relative to BDE-209, compared to the deca-BDE commercial mixture, which may suggest degradation of BDE-209 between source and sampling site, or release from older deca-BDE commercial mixtures, which may have contained higher proportions of nona-BDEs. The highest PBDE concentrations occurred when air-masses passed over urban and industrial areas to the SSW–SW, though small local influences may also be seen. PBDE concentrations appear to have been influenced mainly by particle levels: 1–3 μm diameter particles for BDE-153, and 3–10 μm particles for BDEs with 7–10 Br atoms. BDE-153 may either be released from combustion sources, or re-condense onto small particles after emission, whereas BDE-209 and nona-BDEs appear to be associated with larger dust particles from industrial or domestic sources.
Journal: Environment International - Volume 34, Issue 3, April 2008, Pages 412–419