Particle size distribution and gas-particle partitioning of polychlorinated biphenyls in the atmosphere in Beijing, China

CORC > 生态环境研究中心 > 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

	Particle size distribution and gas-particle partitioning of polychlorinated biphenyls in the atmosphere in Beijing, China
	Zhang, Xian; Zhu, Qingqing; Dong, Shujun; Gao, Lirong; Zheng, Minghui; Liang, Yong; Liu, Guorui
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2017-02-01
卷号	24 期号:2 页码:1389-1396
关键词	Polychlorinated Biphenyls Urban Pollution Atmospheric Pollution Particulate Matter Gas-particle Partitioning Size Distribution
英文摘要	Size-fractionated samples of urban particulate matter (PM; <= 1.0, 1.0-2.5, 2.5-10, and > 10 mu m) and gaseous samples were simultaneously obtained to study the distribution of polychlorinated biphenyls (PCBs) in the atmosphere in Beijing, China. Most recent investigations focused on the analysis of gaseous PCBs, and much less attention has been paid to the occurrence of PCBs among different PM fractions. In the present study, the gas-particle partitioning and size-specific distribution of PCBs in atmosphere were investigated. The total concentrations (gas + particle phase fractions) of I (12) pound dioxin-like PCBs, I (7) pound indicator PCBs, and I PCBs pound were 1.68, 42.1, and 345 pg/m(3), respectively. PCBs were predominantly in the gas phase (86.8-99.0 % of the total concentrations). The gas-particle partition coefficients (K (p) ) of PCBs were found to be a significant linear correlated with the subcooled liquid vapor pressures (P (L) (0)) (R (2) = 0.83, P < 0.01). The slope (m(r) ) implied that the gas-particle partitioning of PCBs was affected both by the mechanisms of adsorption and absorption. In addition, the concentrations of PCBs increased as the particle size decreased (> 10, 2.5-10, 1.0-2.5, and <= 1.0 mu m), with most of the PCBs contained in the fraction of <= 1.0 mu m (53.4 % of the total particulate concentrations). Tetra-CBs were the main homolog in the air samples in the gas phase and PM fractions, followed by tri-CBs. This work will contribute to the knowledge of PCBs among different PM fractions and fill the gap of the size distribution of particle-bound dioxin-like PCBs in the air.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/39378]
专题	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
推荐引用方式 GB/T 7714	Zhang, Xian,Zhu, Qingqing,Dong, Shujun,et al. Particle size distribution and gas-particle partitioning of polychlorinated biphenyls in the atmosphere in Beijing, China[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2017,24(2):1389-1396.
APA	Zhang, Xian.,Zhu, Qingqing.,Dong, Shujun.,Gao, Lirong.,Zheng, Minghui.,...&Liu, Guorui.(2017).Particle size distribution and gas-particle partitioning of polychlorinated biphenyls in the atmosphere in Beijing, China.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,24(2),1389-1396.
MLA	Zhang, Xian,et al."Particle size distribution and gas-particle partitioning of polychlorinated biphenyls in the atmosphere in Beijing, China".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 24.2(2017):1389-1396.