Department of Safety, Health, and Environmental Engineering, Hungkuang University, No. 1018, Sec. 6, Taiwan Boulevard, Shalu District, Taichung City, 43302, Taiwan, ROC.
Department of Chemical and Materials Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan, ROC.
Environ Geochem Health. 2020 Feb;42(2):365-375. doi: 10.1007/s10653-019-00360-0. Epub 2019 Jul 8.
The objectives of this study were to measure ambient air particles concentrations of different particulates sizes ranges (PM, PM, PM, PM, PM) at a complex (traffic, residential and commercial) site. Besides, particulates-bound mercury (Hg(p)) concentrations for various particulates sizes (PM, PM, PM, PM, PM) at mixed site were also studied. Finally, ambient air particulates and Hg(p) size distributions were also described at this complex sampling site. The results showed that the average PM, PM, PM, PM, PM concentrations were 48.83, 41.78, 35.41, 19.89, and 11.86 μg/m, respectively. And the average ambient air particulates-bound mercury (Hg(p)) which attached on PM, PM, PM, PM, PM particles concentrations were 0.0838, 0.0867, 0.0790, 0.0546, and 0.0373 ng/m, respectively, in the summer season. In addition, the average ambient air Hg(p) which attached on PM, PM, PM, PM, PM particles concentrations were 0.0175, 0.0144, 0.0120, 0.0092, and 0.0057 ng/m, respectively, in the autumn season. Finally, the average ambient air Hg(p) which attached on PM, PM, PM, PM, PM particles concentrations were 0.0070, 0.0053, 0.0038, 0.0026, and 0.0014 ng/m, respectively, in the winter season. And July has the average highest PM and PM concentrations. As for PM, PM and PM particulates, the average highest particulates concentrations all occurred in November. In addition, the highest average Hg(p) in PM, PM, PM, PM and PM concentrations all occurred in July. Moreover, the average particles and particulates-bound mercury m.m.d. values were ranged from 1.0 to 1.8 and 0.7 to 2.0 μm from July to December of 2018, respectively, at this mixed sampling site. As for monthly ambient air particles sizes distributions, the results further showed that the main peaks for July, September, and December all occurred in the sizes of 10-18 μm. The main peaks for October and November all occurred in the sizes of 2.5-10 μm. As for monthly Hg(p) sizes distributions, the results further showed that the main peaks for July occurred in the size of 0.3-1 μm. The main peak for September occurred in the size of 1-2.5 μm. The main peaks for October to December all occurred in the size of 10-18 μm. The above finding further concluded that the particulates-bound mercury (Hg(p)) was tended to be associated with the large particles sizes mode during the winter season. Finally, this study further shows that the Taichung Thermal Power Plant was responsible for the main emission source of Hg(p) especially in summer season of Central Taiwan.
本研究的目的是测量不同粒径范围（PM、PM、PM、PM、PM）的环境空气颗粒浓度。此外，还研究了混合场地不同粒径（PM、PM、PM、PM、PM）的颗粒结合汞（Hg(p)）浓度。最后，还描述了该复杂采样点的环境空气颗粒物和 Hg(p)的粒径分布。结果表明，夏季 PM、PM、PM、PM、PM 的平均浓度分别为 48.83、41.78、35.41、19.89 和 11.86μg/m。附着在 PM、PM、PM、PM、PM 颗粒上的大气颗粒物结合汞（Hg(p)）的平均浓度分别为 0.0838、0.0867、0.0790、0.0546 和 0.0373ng/m。此外，秋季附着在 PM、PM、PM、PM、PM 颗粒上的大气 Hg(p)的平均浓度分别为 0.0175、0.0144、0.0120、0.0092 和 0.0057ng/m。最后，冬季附着在 PM、PM、PM、PM、PM 颗粒上的大气 Hg(p)的平均浓度分别为 0.0070、0.0053、0.0038、0.0026 和 0.0014ng/m。7 月的 PM 和 PM 浓度平均最高。对于 PM、PM 和 PM 颗粒物，11 月的平均颗粒物浓度最高。此外，7 月 PM、PM、PM 和 PM 中 Hg(p)的平均浓度最高。此外，2018 年 7 月至 12 月，混合采样点的平均颗粒和颗粒结合汞中值粒径（m.m.d.）值分别在 1.0 至 1.8μm 和 0.7 至 2.0μm 之间。对于逐月大气颗粒物粒径分布，结果进一步表明，7 月、9 月和 12 月的主要峰值出现在 10-18μm 粒径范围内。10 月和 11 月的主要峰值出现在 2.5-10μm 粒径范围内。对于逐月 Hg(p)粒径分布，结果进一步表明，7 月的主要峰值出现在 0.3-1μm 粒径范围内。9 月的主要峰值出现在 1-2.5μm 粒径范围内。10 月至 12 月的主要峰值均出现在 10-18μm 粒径范围内。上述发现进一步表明，冬季颗粒结合汞（Hg(p)）倾向于与大颗粒物粒径模式相关。最后，本研究进一步表明，台中火力发电厂是造成台湾中部夏季 Hg(p)主要排放源的原因。
