北京市大气PM2.5中多溴联苯醚污染水平与来源分析

摘要/Abstract

摘要：

2008年1月、9月和10月在北京城区5个采样点共采集9个大气颗粒物PM_2.5样品。遵循US EPA-1614方法，采用同位素稀释、高分辨气相色谱/高分辨质谱(HRGC/MS)联用技术，测定了大气颗粒物PM_2.5样品中14种多溴联苯醚(PBDEs)的质量浓度，研究了北京市城区大气颗粒物PM_2.5中多溴联苯醚的污染水平、分布特征及来源。结果表明: 9个大气颗粒物PM_2.5样品中PBDEs的质量浓度范围为2.82~57.94 pg/m³，平均值为15.67 pg/m³，BDE-209的质量浓度为0.34~7.32 pg/m³，PM_2.5样品中PBDEs的质量浓度冬季高于秋季；高溴代联苯醚在颗粒物中的含量高，低溴代联苯醚的含量低；交通源对大气颗粒物PM_2.5中PBDEs的污染贡献值很小，工业污染源贡献大于交通源，从含有溴代阻燃剂的物品释放到大气中的PBDEs对大气颗粒物PM_2.5中PBDEs的污染贡献值最大。

关键词: PM_2.5, 多溴联苯醚(PBDEs), 单体分布, 源分析

Abstract:

In January, September and October,2008, 9 PM_2.5 samples were collected concurrently at 5 contrasting sites. The mass concentrations of 14 Polybrominated Diphenyl Ethers (PBDEs) congeners were detected with isotope dilution and high resolution gas chromatography/high resolution mass spectrometry (HRGS/HRMS) based on US EPA-1614 method. The pollution level, spatial distribution and source of 14 PBDEs atmospheric matterPM_2.5 in Beijing were analyzed. The results show that the mass concentrations of PBDEs are in the range of 2.82~57.94 pg/m3 with mean value of 15.67 pg/m³, and the mass concentration of BDE-209 is in the range of 0.34~7.32 pg/m³. The mass concentration of PBDEs in PM_2.5 in winter is higher than that in autumn. Monomer distribution of PBDEs in PM_2.5 samples is different, and the mass concentrations of penta-BDE and hexa-BDE are higher than those of tetra-BDE and tri-BDE. The PBDEs pollution are generally from traffic, industrial fuel and fire retardant, the contribution to PBDEs pollution is fire retardant, industrial fuel and traffic in descending order.

Key words: PM_2.5 , polybrominated diphenyl ethers (PBDEs), monomer distribution, source analysis

中图分类号:

X513

杨雪, 刘大锰, 孙俊玲. 北京市大气PM_2.5中多溴联苯醚污染水平与来源分析[J]. 现代地质, 2010, 24(2): 355-361.

YANG Xue, LIU Da-Meng, SUN Jun-Ling. Pollution Level and Source Analysis of Polybrominated Diphenyl Ethers(PBDEs)from Atmospheric Matter PM_2.5 in Beijing[J]. Geoscience, 2010, 24(2): 355-361.

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