Department of Public Health, College of Health Care and Management, Chung Shan Medical University, Taichung 40242, Taiwan, ROC.
J Hazard Mater. 2010 Jul 15;179(1-3):1022-30. doi: 10.1016/j.jhazmat.2010.03.107. Epub 2010 Apr 1.
Daily and hourly average data of PM(10) from 17 air-quality monitoring stations distributed throughout four counties and along four rivers (the Ta-an River, the Tachia River, the Wu River and the Choshui River) in central Taiwan were collected from November 15 to 21, 2008. During this period, the wind speed and daily PM(10) concentrations increased drastically from the 17th to the 19th, and reached a maximum level on the 19th. Six air-quality monitoring stations (Dajia, Wurih, Siansi, Dungnan, Lunbei and Taisi) in the central Taiwan were selected for sampling fine (PM(2.5)) and coarse (PM(10-2.5)) aerosols samples during and after the river-dust episode. Most of the ratios of [crustal elements (Fe or Al)/reference elements (Cd or Mo)] for the samples obtained during episode are higher than those obtained after episode. The values of Fe(10-2.5)/Cd(10-2.5) and Fe(10-2.5)/Mo(10-2.5) were very high in Lubei, Taisi, and Dungnan stations where heavy aeolian river dust occurred. These data suggest that the ratios of Fe(10-2.5)/Cd(10-2.5) and Fe(10-2.5)/Mo(10-2.5) can be successfully used as indexes to evaluate the comparative degree of effect of aeolian river dust on the atmosphere of multiple stations.
2008 年 11 月 15 日至 21 日，收集了台湾中部四个县和四条河流（大安溪、塔加溪、乌溪和浊水溪）的 17 个空气质量监测站的 PM（10）逐时逐日平均数据。在此期间，风速和每日 PM（10）浓度从第 17 天到第 19 天急剧上升，并在第 19 天达到最高水平。选择台湾中部的六个空气质量监测站（大甲、梧栖、四箴、斗南、仑背和台西）在河尘事件期间和之后进行细颗粒（PM（2.5））和粗颗粒（PM（10-2.5））气溶胶采样。事件期间获得的样本中[地壳元素（Fe 或 Al）/参考元素（Cd 或 Mo）]的比值大多数高于事件之后获得的比值。在发生严重风尘的芦北、台西和斗南站，Fe（10-2.5）/Cd（10-2.5）和 Fe（10-2.5）/Mo（10-2.5）的值非常高。这些数据表明，Fe（10-2.5）/Cd（10-2.5）和 Fe（10-2.5）/Mo（10-2.5）的比值可以成功用作评估风尘对多个站大气影响程度的指标。
