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题名: Particle size distributions and gas-particle partitioning of polychlorinated dibenzo-p-dioxins and dibenzofurans in ambient air during haze days and normal days
作者: Zhang, Xian; Zheng, Minghui; Liang, Yong; Liu, Guorui; Zhu, Qingqing; Gao, Lirong; Liu, Wenbin; Xiao, Ke; Sun, Xu
刊名: SCIENCE OF THE TOTAL ENVIRONMENT
出版日期: 2016-12-15
卷号: 573, 期号:0, 页码:876-882
关键词: Dioxin ; Atmosphere ; Particle ; Gas-particle partitioning ; Distribution
DOI: 10.1016/j.scitotenv.2016.08.198
部门归属: 环境化学与生态毒理学国家重点实验室
英文摘要: Little information is available on the distributions of airborne polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during haze days. In this study, PCDD/F concentrations, particle size distributions, and gas-particle partitioning in a Beijing suburban area during haze days and normal days were investigated. High PCDD/F concentrations, 3979-74,702 fg m(-3) (173-3885 fg I-TEQ m(-3)), were found during haze days and-98% of the PCDD/Fs were associated with particles. Most PCDD/F congeners (>90%) were associated with particles. PCDD/ F concentrations increased as particle sizes decreased and 95% of the particle-bound PCDD/Fs were associated with inhalable fine particles with aerodynamic diameters < 2.5 mu m. PCDD/Fs were mainly absorbed in the particles and the Hamer-Bidleman model predicted the particulate fractions of the PCDD/F congeners in the air samples well. The investigated PCDD/F concentrations and particle-bound distributions were different during normal days than during haze days. Temporal airborne PCDD/F trends in a suburban area during haze conditions could support better understanding of the exposure risk posed by toxic PCDD/Fs associated with fine particles. (C) 2016 Elsevier B.V. All rights reserved.
收录类别: SCI
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内容类型: 期刊论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35920
Appears in Collections:环境化学与生态毒理学国家重点实验室_期刊论文

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