2009～2012年度兰州地区大气气溶胶中210Pb浓度监测

摘要

为获得兰州地区近年来大气气溶胶中放射性核素210 Pb浓度变化情况。2009～2012年度利用大流量大气气溶胶采样器采集样品，使用低本底高纯锗γ谱仪测定采集样品中210 Pb。获得了监测期间：兰州地区大气气溶胶中210 Pb浓度的变化范围为0．12～4．33 mBq· m-3，平均值为0．75±0．42 mBq · m-3；兰州地区大气气溶胶中放射性核素210 Pb浓度冬季含量较高，多雨的5～9月份含量较低；兰州地区成人210 Pb的年吸收剂量为6．68×10-6 Sv。%In order to obtain the variation of 210 Pb concentration in aerosol of Lanzhou .The aerosol samples were collected on the filter by a high volume air sampler .The 210 Pb concentration was measured by low background HPGe gamma spectrometer .During the monitoring period , the 210 Pb concentration varied from 0.12 to 4.33 mBq m -3with an average of 0.75 ~0.42 mBq m-3 in the Lanzhou aerosol;The atmospheric210Pb concentrations were higher in winter and lower from May to September in Lanzhou;The annual effective dose for inhalation of 210 Pb to the adult in Lanzhou was 6.68 ×10 -6 Sv.