Atmospheric concentrations of 7Be and 210Pb in weekly aerosols at Hirosaki, a heavy snowfall area in Japan.

IF 0.8 4区环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES Radiation protection dosimetry Pub Date : 2024-11-13 DOI:10.1093/rpd/ncae156

Khemruthai Kheamsiri, Oumar Bobbo Modibo, Bagus Sidik Waskito Hadi, Haruka Kuwata, Ryohei Yamada, Chutima Kranrod, Naofumi Akata

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Abstract

To understand the regional properties of atmospheric 7Be and 210Pb concentrations at Hirosaki, aerosol samples were collected weekly for the investigation. Total suspended particles (TSP) concentration ranged from 0.14 to 1.19 mg m-3 with a mean value of 0.29 ± 0.08 mg m-3. The activity concentrations during the observation period have shown a similar trend between 7Be and 210Pb, comparable to reported studies. The activity concentrations of 7Be and 210Pb ranged from 0.46 to 4.94 mBq m-3 with an average of 2.22 mBq m-3 and from 0.26 to 1.29 mBq m-3 with an average of 0.64 mBq m-3, respectively. The relation between precipitation and radionuclide concentrations indicated that precipitation is an essential factor in the radionuclide removal process. The rainfall/snowfall had a significant impact on the deposition, and the process was greatly affected by the changes in the features of raindrops and snowflakes, such as intensity, shape, surface area, and falling speed.

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日本大雪地区弘前每周气溶胶中 7Be 和 210Pb 的大气浓度。

为了了解弘前大气中 7Be 和 210Pb 浓度的区域特性，调查人员每周收集气溶胶样本。总悬浮颗粒物（TSP）浓度范围为 0.14 至 1.19 毫克/立方米，平均值为 0.29 ± 0.08 毫克/立方米。在观测期间，7Be 和 210Pb 的放射性浓度呈现出类似的趋势，与已报道的研究结果相当。7Be 和 210Pb 的放射性活度濃度分別介乎 0.46 至 4.94 mBq m-3，平均值為 2.22 mBq m-3，以及 0.26 至 1.29 mBq m-3，平均值為 0.64 mBq m-3。降水与放射性核素浓度之间的关系表明，降水是放射性核素清除过程中的一个重要因素。降雨/降雪对沉积有重要影响，雨滴和雪花的强度、形状、表面积和下落速度等特征的变化对沉积过程有很大影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Radiation protection dosimetry 环境科学-公共卫生、环境卫生与职业卫生

CiteScore

1.40

自引率

10.00%

发文量

223

审稿时长

6-12 weeks

期刊介绍： Radiation Protection Dosimetry covers all aspects of personal and environmental dosimetry and monitoring, for both ionising and non-ionising radiations. This includes biological aspects, physical concepts, biophysical dosimetry, external and internal personal dosimetry and monitoring, environmental and workplace monitoring, accident dosimetry, and dosimetry related to the protection of patients. Particular emphasis is placed on papers covering the fundamentals of dosimetry; units, radiation quantities and conversion factors. Papers covering archaeological dating are included only if the fundamental measurement method or technique, such as thermoluminescence, has direct application to personal dosimetry measurements. Papers covering the dosimetric aspects of radon or other naturally occurring radioactive materials and low level radiation are included. Animal experiments and ecological sample measurements are not included unless there is a significant relevant content reason.