Monitoring and analysis of activity concentrations of 7Be and 210Pb in atmospheric aerosol in Beijing from 2017 to 2020
10.3760/cma.j.issn.0254-5098.2021.09.009
- VernacularTitle:2017—2020年北京地区大气气溶胶中 7Be和 210Pb放射性活度浓度监测与分析
- Author:
Huan WANG
1
;
Qinghua MENG
;
Yongzhong MA
;
Yun LOU
;
Bin BAI
;
Weijie ZHU
;
Yuxia KONG
;
Hongfang WANG
;
Hong ZHANG
;
Zechen FENG
;
Shuguang ZHAI
;
Jun YU
Author Information
1. 北京市疾病预防控制中心 北京市预防医学研究中心 100013
- Keywords:
Beijing;
Atmospheric aerosol;
7Be;
210Pb;
Activity concentration
- From:
Chinese Journal of Radiological Medicine and Protection
2021;41(9):690-694
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To monitor and analyze the activity concentrations of 7Be and 210Pb in atmospheric aerosol in Beijing from 2017 to 2020. Methods:Totally 1 074 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 7Be and 210Pb. Results:The activity concentrations of 7Be 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 210Pb, with an avearage 3.19 mBq/m 3. The differences in activity concentrations of 7Be and 210Pb in atmospheric aerosol among differernt seasons were statistically significant ( F=32.66, 93.93, P<0.05). Activity concentration of 7Be was highest in spring, followed by autumn, and lowest in summer and winter. Activity concentration of 210Pb ranged from winter, autumn, spring to summer in descending order. Conclusions:The activity concentrations of 7Be and 210Pb in atmospheric aerosol in Beijing from 2017 to 2020 fluctated within the range of normal level.
