沙塵暴與颱風造成台灣雨水中氡濃度改變之研究

Radon Concentration Variations in Rain Water in Taiwan Resulting from Dust Storm and Typhoon

毛正心(Cheng-Hsin Mao) ； 裴晉哲(Jinn-Jer Peir) ； 翁寶山(Pao-Shan Weng) ； 白寶實(Bau-Shei Pei)

《環境保護》 30卷1期 (2007/06) Pp. 40-49

https://doi.org/10.30017/EP.200706.0004

摘要

本研究探討沙塵暴與颱風對台灣雨水中氡濃度改變的影響。利用駐極電介體被動式環境氡－222監測儀（electrets passive environmental 222Rn monitor，簡稱E-PERM），在2006年3月至8月期間，於北台灣新竹所佈置的兩個偵測站，進行雨水中氡濃度的量測。量測結果發現，測量期間風速、雨量等參數的變化幅度較大，溫度及雨水pH值變化趨勢則較不明顯，但未足以在這些參數與水中氡濃度增加間建立顯著的關係。雨水中氡濃度最高量測值，發生在7月份的凱米(Kaemi)颱風侵襲時，此外，碧利斯(Bilis)颱風來襲、以及在大陸性沙塵暴伴隨降雨的狀況下，雨水中的氡濃度也相對較高。由量測雨水中氡濃度的結果顯示，沙塵暴與颱風來襲時並伴隨降雨的氣候，一般雨水中氡濃度將顯著的增加。

關鍵字

駐極電介體 ； 氡－222濃度 ； 雨水 ； 沙塵暴 ； 颱風

並列摘要

Radon concentrations in rain water were measured to study the variations of 222Rn resulting from dust storm and typhoon in Taiwan. In this study, two sampling sites were established for sampling rain water at Hsinchu in the northwestern part of Taiwan during March to August 2006. The electrets with a commercial name of E-PERM (electret-passive environmental radiation monitor) were used to measure 222Rn in rain water samples. As measurement results, of the four parameters involved, wind speed and precipitation varied significantly during the monitoring period, while temperature and pH value of rain water changed unapparently. No significant correlation could be found between those four parameters and the increase in radon concentration in rain water. Highest radon concentrations were detected in July 2006 after typhoon Kaemi. Moreover, Typhoon Bilis in July 2006 and dust storm with heavy rain on March 23, 2006 also caused high radon concentrations, respectively. In conclusion, both dust storm and typhoon accompanied with rain could obviously increase the radon concentrations in rain water in this study.

並列關鍵字

electrets ； radon ； rain water ； dust storm ； typhoon