Migration mechanisms of 90Sr and 137Cs on terraces

Yongjing Guan; Zichen Guo; Wu Chen; Kaidi Fan; Hua He; Liangjia Cui; Chunping Huang; Xianwen He; Zeyue Xu; Jiajia Zhang; Ye He; Huijuan Wang

doi:10.1016/j.jenvrad.2024.107428

Migration mechanisms of ⁹⁰Sr and ¹³⁷Cs on terraces

J Environ Radioact. 2024 May:275:107428. doi: 10.1016/j.jenvrad.2024.107428. Epub 2024 Mar 27.

Authors

Yongjing Guan¹, Zichen Guo², Wu Chen³, Kaidi Fan³, Hua He³, Liangjia Cui³, Chunping Huang³, Xianwen He⁴, Zeyue Xu⁴, Jiajia Zhang⁴, Ye He⁴, Huijuan Wang⁵

Affiliations

¹ Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China. Electronic address: yjguan@gxu.edu.cn.
² Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China; Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China.
³ Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China.
⁴ Radiation-Environment Management and Monitoring Station of Guangxi Zhuang Autonomous Region, Guangxi, Nanning, 530222, China.
⁵ Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning, 530004, China. Electronic address: hjwang@gxu.edu.cn.

PMID: 38547560
DOI: 10.1016/j.jenvrad.2024.107428

Abstract

In order to investigate the impact of environmental conditions on the distribution and migration of ⁹⁰Sr in the Longji terrace environment, the activity concentrations of ⁹⁰Sr and ¹³⁷Cs were determined. The activity concentration ranges of ⁹⁰Sr and ¹³⁷Cs in surface soil were 0.15-1.04 Bq/kg and 2.16-6.94 Bq/kg, respectively. These results showed that there was a similar trend between the activity concentration of ⁹⁰Sr and ¹³⁷Cs in the surface soil along the runoff path and their activity concentration were influenced by the slope of the terraced terrain. On the other hand, the activity ranges of ⁹⁰Sr and ¹³⁷Cs in soil cores were 0.01-2.74 Bq/kg and 0.43-7.19 Bq/kg, respectively. These results indicate that the migration mechanism of ⁹⁰Sr is different from that of ¹³⁷Cs. As compared with ¹³⁷Cs, ⁹⁰Sr is significantly influenced by the moisture content. In addition, high span of ¹³⁷Cs/⁹⁰Sr activity ratios were found in this study, which were attributed to the characteristics of cultivated land and frequent artificial disturbances that intensified the migration of ⁹⁰Sr.

Keywords: (137)Cs; (90)Sr; Migration mechanism; Terraces.

MeSH terms

Cesium Radioisotopes* / analysis
Radiation Monitoring*
Soil Pollutants, Radioactive* / analysis
Strontium Radioisotopes* / analysis

Substances

Cesium Radioisotopes
Strontium Radioisotopes
Soil Pollutants, Radioactive
Cesium-137
Strontium-90