Atmospheric PM2.5 and Polychlorinated Dibenzo-P-Dioxins and Dibenzofurans in Taiwan
Aerosol and Air Quality Research, 18: 762–779, 2018 Copyright © Taiwan Association for Aerosol Research ISSN: 1680-8584 print / 2071-1409 online doi: 10.4209/aaqr.2018.02.0050 Atmospheric PM2.5 and Polychlorinated Dibenzo-p-dioxins and Dibenzofurans in Taiwan Yen-Yi Lee 1, Lin-Chi Wang2*, Jinning Zhu 3**, Jhong-Lin Wu4***, Kuan-Lin Lee1 1 Department of Environmental Engineering, National Cheng Kung University, Tainan 70101, Taiwan 2 Department of Civil Engineering and Geomatics, Cheng Shiu University, Kaohsiung 83347, Taiwan 3 School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 246011, China 4 Sustainable Environment Research Laboratories, National Cheng Kung University, Tainan 70101, Taiwan ABSTRACT In this study, the atmospheric PM2.5, increases/decreases of the PM2.5, the PM2.5/PM10 ratio, total PCDD/Fs-TEQ concentrations, PM2.5-bound total PCDD/Fs-TEQ content, and PCDD/F gas-particle partition in Taiwan were investigated for the period 2013 to 2017. In Taiwan, the annual average PM2.5 concentrations were found to be 28.9, 24.1, 21.4, 20.2, –3 and 19.9 µg m in 2013, 2014, 2015, 2016, and 2017, respectively, which indicated that the annual variations in PM2.5 levels were decreasing during the study period. The average increases (+)/decreases (–) of PM2.5 concentrations were –16.7%, –11.1%, –5.75%, and –1.73% from 2013 to 2014, from 2014 to 2015, from 2015 to 2016, and from 2016 to 2017, respectively. Based to the relationship between PM10 values and total PCDD/F concentrations obtained from previous studies, we estimated that in 2017, the annual average total PCDD/Fs-TEQ concentrations ranged between 0.0148 –3 –3 (Lienchiang County) and 0.0573 pg WHO2005-TEQ m (Keelung City), and averaged 0.0296 pg WHO2005-TEQ m , while –1 the PM2.5-bound total PCDD/Fs-TEQ content ranged from 0.302 (Kaohsiung City) to 0.911 ng WHO2005-TEQ g –1 (Keelung City), at an average of 0.572 ng WHO2005-TEQ g .
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