| 王欢,孟庆华,马永忠,等.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[J].中华放射医学与防护杂志,2021,41(9):690-694.Wang Huan,Meng Qinghua,Ma Yongzhong,et al.Monitoring and analysis of activity concentrations of 7Be and 210Pb in atmospheric aerosol in Beijing from 2017 to 2020[J].Chin J Radiol Med Prot,2021,41(9):690-694 |
| 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 7Be and 210Pb in atmospheric aerosol in Beijing from 2017 to 2020 |
| 投稿时间：2020-12-04 |
| DOI：10.3760/cma.j.issn.0254-5098.2021.09.009 |
| 中文关键词: 北京市 大气气溶胶 7Be 210Pb 放射性活度浓度 |
| 英文关键词:Beijing Atmospheric aerosol 7Be 210Pb Activity concentration |
| 基金项目:国家自然科学基金（81871386） |
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| 中文摘要: |
| 目的 监测与分析2017—2020年北京地区大气气溶胶中7Be和210Pb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1 074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7Be和210Pb放射性活度浓度。结果 2017—2020年北京地区大气气溶胶中7Be放射性活度浓度的变化范围为0.56~14.84 mBq/m3，平均值为6.84 mBq/m3。210Pb放射性活度浓度的变化范围为0.01~9.37 mBq/m3，平均值为3.19 mBq/m3。2017—2020年北京大气气溶胶7Be和210Pb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7Be放射性活度浓度春季最高，秋季次之，夏季和冬季最低，210Pb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7Be和210Pb放射性活度浓度处于正常涨落水平范围内。 |
| 英文摘要: |
| 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/m3, with an avearage of 6.84 mBq/m3, and from 0.01 to 9.37 mBq/m3 for 210Pb, with an avearage 3.19 mBq/m3. 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. |
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