Marine Hydrophysical Institute of RAS, Kapitanskaya Street 2, Sevastopol, Russian Federation, 299011.
Environ Monit Assess. 2021 Aug 2;193(8):545. doi: 10.1007/s10661-021-09337-y.
This paper provides a new approach that simplifies the monitoring of Pb activity concentration on aerosols in the atmospheric surface layer. The approach allows obtaining data on Pb activity concentration with the discreteness of 2 h. The experimental setup described in the paper made it possible to achieve a minimum detectable activity level of 0.4 Bq m. Using this approach, the data on the diurnal variability of Pb activity concentration in the atmosphere of Sevastopol city for a period of 18 months were obtained. The Pb activity concentration varied from < 0.4 (less than 1% of the data series) to 8.9 Bq m, mean value 2.0 ± 1.0 Bq m. The analysis of the temporal variability of Pb activity concentration on different time scales (diurnal, seasonal) was carried out. Annually averaged diurnal variation curve of Pb activity concentration showed a peak at 6:00 local time and a minimum at 18:00. The maximum variability in the seasonal averaged diurnal cycle of Pb activity concentration is observed in summer (± 30% of the daily average value) and the minimum in winter (± 13%). The maximum seasonal average value of Pb activity concentration is observed in winter (2.5 Bq m) and the minimum in summer (1.4 Bq m). A quantitative estimate of the annual effective dose due to exposure to outdoor radon was obtained by using Pb data, and it was 0.03 mSv a.
本文提供了一种简化监测大气近地表层气溶胶中 Pb 活性浓度的新方法。该方法可以在 2 小时的时间间隔内获得 Pb 活性浓度数据。本文中描述的实验装置使得能够达到 0.4 Bq m 的最小可检测活性水平。使用这种方法，获得了塞瓦斯托波尔市大气中 Pb 活性浓度在 18 个月期间的日变化数据。Pb 活性浓度变化范围从 < 0.4（不到数据系列的 1%）至 8.9 Bq m，平均值为 2.0 ± 1.0 Bq m。对不同时间尺度（日、季）的 Pb 活性浓度的时间变化进行了分析。年均日变化曲线显示 Pb 活性浓度在当地时间 6:00 达到峰值，在 18:00 达到谷值。Pb 活性浓度季节性日变化的最大变异性出现在夏季（日平均值的 ± 30%），最小值出现在冬季（± 13%）。Pb 活性浓度的最大季节性平均值出现在冬季（2.5 Bq m），最小值出现在夏季（1.4 Bq m）。通过使用 Pb 数据对户外氡暴露引起的年有效剂量进行了定量估计，其值为 0.03 mSv a。
