南宁城区室外氡浓度变化规律研究

doi:10.27045/j.1000-8187.202605007

摘要/Abstract

摘要： 为探究广西南宁城区室外大气氡浓度的水平特征与变化规律,以南宁市城区中心为监测点,开展了两次为期一年的连续监测(2023年4月—2024年3月、2024年10月—2025年9月)。采用3款测氡仪同步测量,结合气象数据深入分析氡浓度的动态变化及关键影响因素。有效监测数据获取率为95.0%,结果显示:2023—2025年南宁城区室外大气氡浓度平均值为14.5±9.7 Bq/m³,具有显著的昼夜与季节性变化特征。日变化氡浓度峰值出现在6:00—7:00(18.0 Bq/m³),谷值出现在14:00—15:00(11.7 Bq/m³);季节变化夏季(6—8月)浓度最低,冬季(12—2月)浓度最高。相关性分析表明,温度、风速与氡浓度呈负相关,空气质量指数与氡浓度呈正相关。研究结果为南宁城区氡暴露剂量评估、大气边界层研究及辐射环境监测提供了科学数据支撑。

关键词: 大气, 氡浓度, 影响因素, 连续测量, 空气质量指数

Abstract: To investigate the levels and variation patterns of outdoor atmospheric radon concentration in Nanning, Guangxi, continuous monitoring was conducted over two one-year periods at an urban central site of Nanning, covering April 2023-March 2024 and October 2024-September 2025. Three mainstream domestic and international radon monitors were deployed for synchronous measurements. Combined with meteorological data, the dynamic variations of radon concentration and its key influencing factors were thoroughly analyzed. The acquisition rate of valid monitoring data was 95.0%. The results indicated that the average outdoor atmospheric radon concentration in urban Nanning from 2023 to 2025 was (14.5±9.7) Bq/m³, exhibiting distinct diurnal and seasonal variations. For diurnal cycles, the radon concentration peaked at 6:00-7:00 (18.0 Bq/m³) and reached its minimum at 14:00-15:00 (11.7 Bq/m³). Seasonally, the lowest concentrations occurred from June to August, while the highest values appeared from November to February. Hourly correlation analysis revealed that air temperature and wind speed were negatively correlated with radon concentration, while the Air Quality Index (AQI) showed a positive correlation. This study provides scientific data support for radon exposure dose assessment, atmospheric boundary layer research, and environmental radiation monitoring in the Nanning area.

Key words: atmosphere, radon concentration, influencing factors, continuous measurement, air quality index

中图分类号:

X591

林晨, 詹利群, 苏传程, 许明发, 徐聘, 彭文斌, 常青. 南宁城区室外氡浓度变化规律研究[J]. 辐射防护, 2026, 46(5): 437-445.

LIN Chen, ZHAN Liqun, SU Chuancheng, XU Mingfa, XU Pin, PENG Wenbin, CHANG Qing. A study on the variation patterns of outdoor radon concentration in the Nanning region[J]. RADIATION PROTECTION, 2026, 46(5): 437-445.

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