Concentration levels, compositional profiles, and gas-particle partitioning of polybrominated diphenyl ethers in the atmosphere of an urban city in South China

被引:216
作者
Chen, LG
Mai, BX [1 ]
Bi, XH
Chen, SJ
Wang, XM
Ran, Y
Luo, XJ
Sheng, GY
Fu, JM
Zeng, EY
机构
[1] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Organ Geochem, Guangzhou 510640, Peoples R China
[2] Chinese Acad Sci, Guangzhou Inst Geochem, Guangdong Key Lab Environm Protect & Resource Uti, Guangzhou 510640, Peoples R China
[3] Shanghai Univ, Sch Environm & Chem Engn, Inst Environm Pollut & Hlth, Shanghai 200072, Peoples R China
[4] Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
关键词
D O I
10.1021/es052123v
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Air samples were collected in June of 2004 from four sites in the city of Guangzhou, a typical urban center in South China, to determine the levels, compositional profiles, and gas-particle distribution of 11 polybrominated diphenyl ether (PBDE) congeners (BDE-28, -47, -66, -100, -99, -85, -154, -153, -138, -183, and -209). The arithmetic mean atmospheric concentrations of Sigma PBDEs (sum of all target PBDE congeners except for BDE-209) in samples from the urban and city background sites were comparable to or slightly higher than those from other places around the world. The arithmetic mean atmospheric concentrations of BDE-209, however, were higher than those in North America and Europe, and similar to the values from Japan. Congener compositions were dominated by BDE-209 in all (> 70%) but an industrial site, with an average abundance of 48% for BDE-209. The PBDE patterns were generally similar to that in the technical penta-BDE mixture, Bromkal 70-5DE. Partitioning of PBDEs between the gas and particle phases (K-p) was well correlated with the subcooled liquid vapor pressure (P-L(degrees)) for all of the samples, but the relationship differed between samples from different sites. The measured fractions of PBDEs in the particulate phase were compared to the predictions from the Junge-Pankow adsorption and KOA-based absorption models. The results indicated that the KOA-based model worked better than the Junge-Pankow model that tended to overestimate the particulate fractions for most PBDE congeners.
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页码:1190 / 1196
页数:7
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