生态环境学报2025，Vol.34Issue(8)：1163-1171,9.DOI:10.16258/j.cnki.1674-5906.2025.08.001
2022-2023年石家庄气溶胶中7Be和210Pb的变化规律与气象参数的相关性分析和来源解析
Analysis of the Variation Patterns of 7Be and 210Pb in Aerosols in Shijiazhuang from 2022 to 2023 and Their Correlation with Meteorological Parameters and Source Apportionment
摘要
Abstract
To establish a database of radionuclides,sampling began in 2022,with one aerosol sample collected weekly,with a sampling volume greater than 10000 m3,resulting in a total of 118 samples.By analysis,the activity ranges of 7Be and 210 Pb were 0.89-16.0 mBq·m-3 and 0.55-5.60 mBq·m-3,respectively,and the mean activity concentrations of 7Be and 210Pb were(7.02±3.15)mBq·m-3 and(1.66±1.07)mBq·m-3,respectively.These two radionuclides have distinct seasonal.The activity concentration of 7Be throughout the year exhibited two peaks in spring and winter,and the highest value of 210Pb appeared in winter,with the lowest activity concentration occurring in summer.Correlation analysis revealed that high humidity reduced the activity concentration of 7Be,whereas temperature had a greater impact on the activity concentration of 210Pb.The activity concentrations of 7Be and 210Pb were negatively correlated with rainfall,indicating that their removal mechanisms were the same.Although 7Be and 210Pb sources differ,there is a significant positive correlation in the activity concentration owing to the same transport and clearance mechanisms between the two.Two radioactive nuclides initially accumulated on particulate matter and subsequently reached the ground via dry and wet deposition processes.The analysis found that 210Pb tended to bind to PM2.5 with a larger surface area,whereas 7Be was more easily attached to the larger particle size PM10.For the backward trajectory clustering analysis of radionuclide sources,the high-activity-concentration 7Be aerosol in spring was derived from the southward trajectory,and 7Be and 210Pb in winter were due to the enrichment of local particulate matter.These results provide a better understanding of the spatial and temporal changes in 7Be and 210 Pb activity concentrations in Shijiazhuang.关键词
7Be/210Pb/气象参数/后向轨迹/石家庄Key words
7Be/210Pb/meteorological parameters/back trajectory/Shijiazhuang分类
资源环境引用本文复制引用
刘英华,张绍凯,梁华平,卢奕夫,李少婷..2022-2023年石家庄气溶胶中7Be和210Pb的变化规律与气象参数的相关性分析和来源解析[J].生态环境学报,2025,34(8):1163-1171,9.基金项目
生态环境部全国辐射环境监测项目(JC202307) （JC202307）
