Department of Safety, Health and Environmental Engineering, Hung Kuang University, Sha-Lu, Taichung, 433, Taiwan.
Environ Geochem Health. 2018 Aug;40(4):1601-1607. doi: 10.1007/s10653-018-0074-3. Epub 2018 Feb 12.
The plum rain season in Taiwan is in May and June. The severest plum rain season over the last 21 years was in 2017. This study involves the collection of mercury wet depositions in the plum rain season of May-June in 2017. A DMA-80 (Direct Mercury Analyzer) was used to analyze the precipitated mercury concentrations and calculate the wet depositions of mercury in the plum rain season. The results indicate that the highest wet depositions of mercury in the aqueous phase were on 6/16, reaching 209.04 μg/m * day, while the lowest were on 5/15, at 0.18 μg/m * day. The mercury wet depositions in the particulate phase were highest on 6/17, when it exceeded 100 μg/kg, and lowest on particulate phase were occurred in 6/11, when it was 3.64 μg/m * day. The relationship between the wet depositions of mercury in the aqueous phase and rainfall was insignificant, while that between the wet depositions of mercury in the particulate phase and rainfall was significant. The wet depositions of mercury in this study were second highest (30.73 μg/m day) when compared with those in studies in the years 2007-2017. Although the rainfall in this study was only 564 mm HO, high mercury concentrations obtained from the plum rain season result in the high wet depositions of mercury in Taichung, Taiwan.
台湾的梅雨季节在五月和六月。过去 21 年中最严重的梅雨季节是在 2017 年。本研究涉及收集 2017 年 5 月至 6 月梅雨季节的汞湿沉降物。使用 DMA-80（直接汞分析仪）分析沉淀汞浓度并计算梅雨季节的汞湿沉降量。结果表明，在水相中，汞的最高湿沉降量出现在 6 月 16 日，达到 209.04μg/mday，而最低的出现在 5 月 15 日，为 0.18μg/mday。在颗粒相中，汞的湿沉降量最高的是 6 月 17 日，超过 100μg/kg，而最低的是 6 月 11 日，为 3.64μg/m*day。水相汞湿沉降量与降雨量之间的关系不显著，而颗粒相汞湿沉降量与降雨量之间的关系显著。与 2007-2017 年的研究相比，本研究中的汞湿沉降量（30.73μg/m 天）为第二高。尽管本研究中的降雨量仅为 564mm HO，但从梅雨季节获得的高汞浓度导致台湾台中的汞湿沉降量很高。
