云南省三城市气溶胶中^(210)Pb、^(7)Be的长期变化趋势及与PM_(2.5)、PM_(10)和O_(3)关系研究  

The Long-term Variation Tendency of^(210)Pb and^(7)Be Exist in Aerosol and the Correlation with PM_(2.5),PM_(10) and O_(3) in Three Cities of Yunnan Province

作　　者：武荣国 WU Rongguo(Yunnan Division of Nuclear Safety and Radioactive Environment Management,Kunming,Yunnan 650032,China)

机构地区：[1]云南省辐射环境监督站,云南昆明650032

出　　处：《世界核地质科学》2022年第1期130-138,共9页World Nuclear Geoscience

摘　　要：为了解云南昆明市、保山市和临沧市三城市气溶胶中放射性核素^(210)Pb、^(7)Be活度浓度的长期变化趋势及其与大气中PM_(2.5)、PM_(10)和O_(3)的关系,从而对污染防治提供帮助。统计了三城市主城区辐射自动监测站气溶胶中两个核素^(210)Pb、^(7)Be 5年的资料,分析了三城市气溶胶中两个核素^(210)Pb、^(7)Be变化趋势,对同一城市气溶胶中^(210)Pb、^(7)Be与同期大气中与PM_(2.5)、PM_(10)和O_(3)进行了相关性分析,探讨了^(210)Pb、^(7)Be与PM_(2.5)、PM_(10)、O_(3)相关关系。结果显示,三城市^(7)Be平均值相近,昆明站、保山站^(210)Pb接近,而临沧站^(210)Pb较高;5年监测结果三城市^(7)Be保持平稳,升降趋势均不明显,昆明站、保山站^(210)Pb无升降趋势,临沧站呈显著降低;年内^(210)Pb、^(7)Be均为旱季高于雨季,^(7)Be尤为明显;三城市^(210)Pb与^(7)Be均为高度相关;^(7)Be与O_(3)均为正相关;临沧站的^(210)Pb与PM_(10)为正相关,保山站的^(210)Pb与PM_(2.5)为正相关。分析认为^(7)Be与O_(3)正相关很可能源于二者均与大气层垂直对流过程密切相关,^(210)Pb与PM_(2.5)及PM_(10)的相关性则可能与地表辐射环境相关。To investigate the long-term variation of the activity concentration of two radionuclides^(210)Pb and^(7)Be exists in atmospheric aerosol and the relationship with PM_(2.5),PM_(10)and O_(3)in the atmosphere in Kunming,Baoshan and Lincang in Yunnan province,five years monitoring data were obtained by the automatic monitoring station in the main area of Kunming,Baoshan and Lincang,and the variation tendency of^(210)Pb and^(7)Be,and the relationship with PM_(2.5),PM_(10)and O_(3)werr studied.Based on these data,the correlations between^(210)Pb,^(7)Be and PM_(2.5),PM_(10),O_(3)were discussed.Our study showed that for^(7)Be,the average data per year for the three cities were similar.While for^(210)Pb,the data in Kunming and Baoshan are similar,but the value of Lincang is evident higher.Furthermore,during five years,the variation of^(7)Be in all three cities was pretty small.While^(210)Pb in Kunming and Baoshan also keeps stable,but decreases evidently in Lincang during these years.The values for both^(210)Pb and^(7)Be are higher in dry season than in wet season in one year especially for^(7)Be.The values of^(210)Pb and^(7)Be are highly correlated.^(7)Be and O_(3)in all three cities have positive correlation,such correlation could originate from the similar strong correlation with the atmospheric vertical circulation for both^(7)Be and O_(3).In Lincang,^(210)Pb is directly proportional to PM_(10),while in Baoshan,^(210)Pb is directly proportional to PM_(2.5),the variation of^(210)Pb and the correlation with PM_(10)and PM_(2.5)could relate to the radiation environment on earth surface.We hope our work can benefit to further pollution control.

关 键 词：气溶胶 ^(210)Pb ^(7)Be 变化趋势 PM_(2.5) PM_(10) O_(3) 

分 类 号：TL941[核科学技术—辐射防护及环境保护]