摘要
目的初步调查宁夏城市和农村室内氡浓度水平及季节变化。方法2022年3月—2023年3月,采用CR-39固体核迹径累积探测器,根据宁夏行政区域划分及人口分布情况,选择宁夏5个地级市22个县(区)的82户城市及61户农村典型住宅,共计143户,按照季节测量室内氡浓度,每期测量3个月,共4期,测量时间为1年。结果宁夏室内年均氡浓度中位数为88 Bq/m^(3),范围为39~226 Bq/m^(3),室内平均氡浓度<100 Bq/m^(3)的测量点占全部调查点的69.9%,所有调查点室内年均氡浓度均<300 Bq/m^(3)。农村室内氡浓度均值明显高于城市(Z=5.85,P<0.05)。宁夏总体、城市和农村室内氡浓度随季节变化明显且呈秋冬季高,春夏季低的特点(χ^(2)=63.97、24.74、43.15,P<0.05)。结论本次宁夏调查点室内氡浓度年均值均小于我国《室内空气质量标准》(GB/T 18883-2022)建议的参考水平300 Bq/m^(3)。
Objective To investigate the indoor radon concentrations and to analyze their seasonal variations in urban and rural residential dwellings in Ningxia province.Methods From March 2022 to March 2023,based on the administrative region division and population distribution in Ningxia,a total of 143 typical residential dwellings,including 82 urban houses and 61 rural houses,were selected to measure indoor radon concentration by CR-39 solid nuclear track detectors for 1 year in Ningxia,with detectors changed every 3 months.Results The annual average indoor radon concentration in Ningxia was 88 Bq/m^(3),range 39-226 Bq/m^(3).The annual average indoor radon concentration was below 100 Bq/m^(3) for 69.9%of the measured dwellings,and below 300 Bq/m^(3) for all of surveyed dwellings.Indoor radon concentrations in rural areas were much higher than those in urban areas(Z=5.85,P<0.05).Indoor radon concentration varied significantly with the seasons,higher in autumn and winter,but lower in spring and summer,in total(χ^(2)=63.97,P=<0.05),urban(χ^(2)=24.74,P=<0.05),and rural(χ^(2)=43.15,P=<0.05).Conclusion The annual average indoor radon concentrations in all the measured dwellings are below the reference level of 300 Bq/m^(3) recommended by Indoor Air Quality Standard(GB/T 18883-2022)in China.
作者
董良
武云云
宋延超
寇珊珊
姬绪莉
李鸿成
王媚琳
Dong Liang;Wu Yunyun;Song Yanchao;Kou Shanshan;Ji Xuli;Li Hongcheng;Wang Meilin(Radiological Health Department,Ningxia Center for Diseases Prevention and Control,Yinchuan 750001,China;Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China)
出处
《中华放射医学与防护杂志》
CAS
CSCD
北大核心
2024年第9期771-775,共5页
Chinese Journal of Radiological Medicine and Protection
基金
宁夏自然科学基金(2021AAC03417)
国家自然科学基金(12105274)。
关键词
室内
氡浓度
固体核径迹探测器
城市
农村
Indoor
Radon concentration
Solid nuclear track detectors
Urban
Rural
