Atmospheric concentrations and gas-particle partitioning of PCDD/Fs and dioxin-like PCBs around Hochiminh city
| Autor: | Kai Hsien Chi, Ngo Thi Thuan, Chien Guo Lien, Moo Been Chang, Ching Lan Tsai, Minh Man Trinh, To Thi Hien |
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| Rok vydání: | 2018 |
| Předmět: |
Pollution
Wet season Polychlorinated Dibenzodioxins Environmental Engineering 010504 meteorology & atmospheric sciences Health Toxicology and Mutagenesis media_common.quotation_subject Chemical Fractionation 010501 environmental sciences Dioxins 01 natural sciences Gas phase Atmosphere Dry season Environmental Chemistry Mass concentration (chemistry) 0105 earth and related environmental sciences media_common Pollutant Air Pollutants Public Health Environmental and Occupational Health General Medicine General Chemistry Polychlorinated Biphenyls Vietnam Environmental chemistry Environmental science Particle Seasons Environmental Monitoring |
| Zdroj: | Chemosphere. 202:246-254 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2018.03.087 |
| Popis: | Atmospheric PCDD/Fs and dl-PCBs samples were collected in Hochiminh city, Vietnam to address the effect of meteorological parameters, especially rainfall, on the occurrence and gas/particle partitioning of these persistent organic pollutants. The results indicate that PCDD/Fs and dl-PCBs concentrations in industrial site are higher than those measured in commercial and rural sites during both rainy and dry seasons. In terms of mass concentration, ambient PCDD/F levels measured in dry season are significantly higher than those measured in rainy season while dl-PCB levels do not vary significantly between rainy and dry seasons. The difference could be attributed to different gas/particle partitioning characteristics between PCDD/Fs and dl-PCBs. PCDD/Fs are found to be mainly distributed in particle phase while dl- PCBs are predominantly distributed in gas phase in both rainy and dry seasons. Additionally, Junge-Pankow and Harner-Bidleman models are applied to better understand the gas/particle partitioning of these pollutants in atmosphere. As a results, both PCDD/Fs and dl-PCBs are under non-equilibrium gas/particle partitioning condition, and PCDD/Fs tend to reach equilibrium easier in rainy season while there are no clear trend for dl-PCBs. Harner-Bidleman model performs better in evaluating the gas/particle partitioning of PCDD/Fs while Junge-Pankow model results in better prediction for dl-PCBs. |
| Databáze: | OpenAIRE |
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