Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing
Outdoor Radon and Its Progeny in Relation to the Particulate Matter during Different Polluted Weather in Beijing
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DOI：
10.3390/atmos14071132
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发表时间：
2023-07
期刊：
影响因子：
2.9
通讯作者：
Cong Yu;Yuan Sun;Nanping Wang
中科院分区：
文献类型：
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作者：
Cong Yu;Yuan Sun;Nanping Wang
本研究旨在探讨不同污染天气条件下氡及其子体浓度与颗粒物浓度之间关系的差异。在北京雾霾和沙尘暴天气期间，通过氡气/钍气和氡气/钍气子体监测仪（ERS-RDM-2S）测量室外氡气及其子体浓度。同时记录颗粒物浓度和气象数据。结果表明，氡气及其子体浓度呈现日变化模式，下午晚些时候达到最低值，清晨达到最高值。两种污染天气条件下的平均氡气浓度相似，但明显高于北京报告的平均值。雾霾期间的平衡当量氡气浓度约为沙尘暴期间的两倍。两种污染天气条件下的 PM10 浓度相似，但霾期间的 PM2.5 浓度比沙尘暴期间高约 2.6 倍。氡及其子体浓度与颗粒物浓度之间存在正相关关系，但雾霾期间的相关性明显高于沙尘暴期间。雾霾期间PM2.5浓度较高，显着增加了氡气及其子体浓度与颗粒物浓度之间的相关性。我们建议在污染天气（尤其是雾霾天气）期间防止氡气暴露。
This study aimed to investigate the differences in the relationship between radon and its progeny concentrations and particulate matter concentrations under varying pollution weather conditions. Outdoor radon and its progeny concentrations were measured by a radon/thoron- and radon/thoron progeny monitor (ERS-RDM-2S) during haze and dust storm weather in Beijing. Particulate matter concentrations and meteorological data were simultaneously recorded. Results showed that radon and its progeny concentrations exhibited a diurnal variation pattern, with a minimum in the late afternoon and a maximum in the early morning. The average radon concentrations were similar under both pollution weather conditions, but significantly higher than the reported average for Beijing. The equilibrium equivalent radon concentration during haze was about two times that during a dust storm. PM10 concentrations were similar in both pollution weather conditions, but PM2.5 concentrations during haze were approximately 2.6 times higher than that during dust storms. A positive correlation was observed between radon and its progeny concentrations and particulate matter concentrations, but the correlation was significantly higher during haze than during dust storms. The higher PM2.5 concentration during haze significantly increased the correlation between radon and its progeny concentrations and particulate matter concentrations. We recommended protecting against radon exposure during pollutant weather, especially haze.