2017—2020年北京地区大气气溶胶中^(7)Be和^(210)Pb放射性活度浓度监测与分析  

Monitoring and analysis of activity concentrations of ^(7)Be and ^(210)Pb in atmospheric aerosol in Beijing from 2017 to 2020

作　　者：王欢[1] 孟庆华[1] 马永忠[1] 娄云[1] 白斌[1] 朱维杰[1] 孔玉侠[1] 王宏芳[1] 张泓[1] 冯泽臣[1] 翟曙光[1] 俞君[1] Wang Huan;Meng Qinghua;Ma Yongzhong;Lou Yun;Bai Bin;Zhu Weijie;Kong Yuxia;Wang Hongfang;Zhang Hong;Feng Zechen;Zhai Shuguang;Yu Jun(Beijing Municipal Center for Disease Prevention and Control,Beijing Research Center for Preventive Medicine,Beijing 100013,China)

机构地区：[1]北京市疾病预防控制中心北京市预防医学研究中心,100013

出　　处：《中华放射医学与防护杂志》2021年第9期690-694,共5页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的监测与分析2017—2020年北京地区大气气溶胶中^(7)Be和^(210)Pb放射性活度浓度变化情况,为有效防治空气污染提供科学依据。方法利用大流量空气气溶胶采样器(SnowWhite)采集气溶胶样品1074份,其中春季、夏季、秋季和冬季分别采集275、266、262和271份。使用低本底高纯锗伽马谱仪(ORTEC)分析气溶胶样品中^(7)Be和^(210)Pb放射性活度浓度。结果2017—2020年北京地区大气气溶胶中^(7)Be放射性活度浓度的变化范围为0.56~14.84 mBq/m^(3),平均值为6.84 mBq/m^(3)。^(210)Pb放射性活度浓度的变化范围为0.01~9.37 mBq/m^(3),平均值为3.19 mBq/m^(3)。2017—2020年北京大气气溶胶^(7)Be和^(210)Pb放射性活度浓度在春、夏、秋、冬四季中差异均有统计学意义(F=32.66、93.93,P<0.05),其中^(7)Be放射性活度浓度春季最高,秋季次之,夏季和冬季最低,^(210)Pb放射性活度浓度由高到低分别为冬季、秋季、春季、夏季。结论2017—2020年北京地区大气气溶胶中^(7)Be和^(210)Pb放射性活度浓度处于正常涨落水平范围内。Objective To monitor and analyze the activity concentrations of ^(7)Be and ^(210)Pb in atmospheric aerosol in Beijing from 2017 to 2020.Methods Totally 1074 atmospheric aerosol samples were collected by high flow air sampler(SnowWhite)including 275 in spring,266 in summer,262 in autumn and 271 in winter and subjected to analysis by low background high-purity germanium gamma-ray spectrometery(ORTEC)to determine the activity concentrations of ^(7)Be and ^(210)Pb.Results The activity concentrations of ^(7)Be in atmospheric aerosol were from 0.56 to 14.84 mBq/m^(3),with an avearage of 6.84 mBq/m^(3),and from 0.01 to 9.37 mBq/m^(3) for ^(210)Pb,with an avearage 3.19 mBq/m^(3).The differences in activity concentrations of ^(7)Be and ^(210)Pb in atmospheric aerosol among differernt seasons were statistically significant(F=32.66,93.93,P<0.05).Activity concentration of ^(7)Be was highest in spring,followed by autumn,and lowest in summer and winter.Activity concentration of ^(210)Pb ranged from winter,autumn,spring to summer in descending order.Conclusions The activity concentrations of ^(7)Be and ^(210)Pb in atmospheric aerosol in Beijing from 2017 to 2020 fluctated within the range of normal level.

关 键 词：北京市 大气气溶胶 7Be 210Pb 放射性活度浓度 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]