Preliminary investigation on indoor radon concentrations in urban and rural areas of Ningxia
10.3760/cma.j.cn112271-20240122-00027
- VernacularTitle:宁夏城市和农村室内氡浓度初步调查
- Author:
Liang DONG
1
;
Yunyun WU
;
Yanchao SONG
;
Shanshan KOU
;
Xuli JI
;
Hongcheng LI
;
Meilin WANG
Author Information
1. 宁夏回族自治区疾病预防控制中心放射卫生科，银川 750001
- Keywords:
Indoor;
Radon concentration;
Solid nuclear track detectors;
Urban;
Rural
- From:
Chinese Journal of Radiological Medicine and Protection
2024;44(9):771-775
- CountryChina
- Language:Chinese
-
Abstract:
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 ( χ2=63.97, P<0.05), urban ( χ2=24.74, P<0.05), and rural ( χ2=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.
