| 灰霾天气下北京海淀城区空气中溴代二恶英在不同粒径颗粒物上的分布特征研究 |
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| 引用本文： | 张宪,石凤琼,王博卉,闫宏远.灰霾天气下北京海淀城区空气中溴代二恶英在不同粒径颗粒物上的分布特征研究[J].北京化工大学学报(自然科学版),2018,45(4):54. |
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| 作者姓名： | 张宪 石凤琼 王博卉 闫宏远 |
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| 作者单位： | 1. 河北大学 公共卫生学院, 保定 071002;2. 中国科学院生态环境研究中心 环境化学与生态毒理学国家重点实验室, 北京 100085 |
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| 基金项目： | 国家自然科学基金（21361140359）；一省一校人才工程项目；2018年大学生创新创业训练计划（201810075103） |
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| 摘 要： | 采用大气颗粒物分级采样器在同一地点连续采集灰霾天北京海淀城区空气样品，调研了空气中溴代二恶英（PBDD/Fs）的污染水平和在不同粒径颗粒物上的分布特征。研究结果表明：灰霾天城区空气样品中PBDD/Fs的质量浓度为1 535~6 053 fg/m3；PBDD/Fs的浓度随着颗粒物粒径（aerodynamic diameter，dae）的减小而增加，在dae<1.0 μm的颗粒物上浓度最高，80%以上的PBDD/Fs分布在dae<2.5 μm的颗粒物上；PBDD/Fs在不同粒径颗粒物上的含量不等，但均以高溴代二苯并呋喃（PBDFs）为主，且其所占比例随颗粒物粒径的增加而减小，然而多溴代二苯并-对-二恶英（PBDDs）在不同粒径颗粒物上的分布差异性却不显著。
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| 关 键 词： | 溴代二恶英 颗粒物 粒径 分布 空气污染 |
| 收稿时间： | 2018-01-12 |
Particle size distribution of polybrominated dibenzo-p-dioxins and dibenzofurans during haze episodes in urban air in Haidian district,Beijing |
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| ZHANG Xian,SHI FengQiong,WANG BoHui,YAN HongYuan.Particle size distribution of polybrominated dibenzo-p-dioxins and dibenzofurans during haze episodes in urban air in Haidian district,Beijing[J].Journal of Beijing University of Chemical Technology,2018,45(4):54. |
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| Authors: | ZHANG Xian SHI FengQiong WANG BoHui YAN HongYuan |
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| Institution: | 1. College of Public Health, Hebei University, Baoding 071002;2. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China |
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| Abstract: | The concentration level and particle size distribution of polybrominated dibenzo-p-dioxins and dibenzofurans (PBDD/Fs) in urban ambient air in Haidian district in Beijing during haze episodes have been determined by continuously collecting samples at one site. The results showed that the PBDD/Fs concentrations ranged from 1 535 to 6 053 fg/m3. The concentrations of PBDD/Fs increased as the particle size decreased. The highest PBDD/Fs concentration was found in the aerodynamic particle diameter (labelled dae) range <1.0 μm and more than 80% of the PBDD/Fs were found in the range dae<2.5 μm particles. The concentrations on the different size of particles were found to vary, and the contributions of the higher brominated dibenzofurans to the total PBDD/Fs concentrations decreased as the particle size increased, but that was not the case for the polybrominated dibenzo-p-dioxins. |
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