成都市大气气溶胶放射性活度浓度与空气质量变化分析

摘要/Abstract

摘要： 通过大体积连续采样方式对成都市锦江区大气气溶胶进行了放射性监测,检出了气溶胶中6种放射性核素⁷Be、²²⁸Ra、¹³⁷Cs、⁴⁰K、²¹⁰Pb和¹³¹I,其活度浓度均在全国本底范围内;⁴⁰K、²¹⁰Pb、²²⁸Ra季度均值活度浓度与PM_2.5、PM₁₀季度浓度变化趋势相同,与O₃季度浓度趋势相反;⁷Be与三者的变化关联不强。通过分析,进一步完善成都市大气气溶胶放射性水平基础数据,为成都市大气放射性污染防治提供了数据参考。

关键词: 气溶胶, γ能谱, 放射性核素

Abstract: Radioactive monitoring of atmospheric aerosols in Chengdu was performed using a high-volume continuous sampling method. Six radionuclides (⁷Be, ²²⁸Ra, ¹³⁷Cs, ⁴⁰K,²¹⁰Pb and ¹³¹I) were quantified, and their activity concentrations fell within the background levels. The activity concentrations of ⁴⁰K, ²¹⁰Pb, and ²²⁸Ra exhibit similar trends to those of PM_2.5 and PM₁₀ concentrations, but are opposite to the trend of O₃ concentration. In contrast, ⁷Be demonstrates a negligible correlation with all three atmospheric parameters.This study enhances the foundational dataset on radionuclide concentrations in atmospheric aerosols in Chengdu,providing a scientific basis for the prevention and control of radioactive air pollution in the region.

Key words: aerosol, γ energy spectrum, radionuclide

中图分类号:

X830.3

蒋兵, 刘鑫, 罗茂丹, 徐僳, 毛万冲, 王茜, 唐辉, 张红帆. 成都市大气气溶胶放射性活度浓度与空气质量变化分析[J]. 辐射防护, 2026, 46(2): 156-163.

JIANG Bing, LIU Xin, LUO Maodan, XU Shu, MAO Wanchong, WANG Qian, TANG Hui, ZHANG Hongfan. Analysis of radioactivity concentration in atmospheric aerosols and air quality changes in Chengdu[J]. RADIATION PROTECTION, 2026, 46(2): 156-163.

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