北京市大气气溶胶总α、总β放射性测量与分析

目的 了解2016—2017年北京市大气气溶胶总α、总β放射性浓度与雾霾的相关性。方法 对北京市大气中气溶胶开展了大流量采样，利用BH1217型低本底α、β测量仪对采集到的气溶胶样品进行总放射性测量。结果 2016年32个监测日大气气溶胶总α、总β放射性浓度范围分别为0.36~9.02 mBq/m³、0.06~3.75 mBq/m³；2017年47个监测日大气气溶胶总α、总β放射性浓度范围分别为0.01~4.31 mBq/m³和0.02~2.61 mBq/m³。结论 大气中总α、总β放射性浓度与季节有关，与PM_2.5和PM₁₀浓度之间不存在明显的相关性。

Measurement and analysis of gross alpha and beta radioactivity of atmospheric aerosols in Beijing

Objective To understand the correlation between gross alpha and beta radioactivity concentration in atmospheric aerosols and haze in Beijing from 2016 to 2017. Methods Large-flow aerosol sampling in Beijing was carried out, and radioactivity aerosol samples were measured by a BH1217 low background alpha-beta measuring instrument. Results Radioactive concentrations of gross alpha and beta in 32 monitoring days in 2016 were 0.36~9.02 mBq/m³ and 0.06~3.75 mBq/m³ respectively. The ranges of gross alpha and beta radioactivity concentration of atmospheric aerosols in 47 monitoring days in 2017 were 0.01~4.31 mBq/m³ and 0.02~2.61 mBq/m³ respectively. Conclusion Gross alpha and beta radioactivity concentrations in the atmosphere are seasonally related, however there is no significant correlation between them and PM_2.5 or PM₁₀ concentrations.