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Analyses of Influencing Factors for Radon Emanation and Exhalation in Soil

  • Weiqiang ZhangEmail author
  • Yuliang Zhang
  • Qiang SunEmail author
Article
  • 118 Downloads

Abstract

The study on radon emanation and exhalation in soil is more and more important for environmental protection, and many influencing factors on radon emanation coefficient and exhalation in soil have been well documented. In order to evaluate the radon change and key influencing factors, this paper made an overall summary based on these studies. The main results show that the change laws of emanation coefficient with elevated temperature of radon can be divided into three types and they relate to the moisture state and content of soil. The normalized radon exhalation has a negative linear correlation with temperature, and the maximum emanation coefficient has a positive linear correlation with heating rate and specific surface. The pores with different size have different effects on the emanation coefficient of radon in the soil, e.g., the micro-pores increase emanation coefficient, and the mezzo-pores decrease emanation coefficient. Taken together, our results offered guiding significance for the evaluation of radon in soil and in air when soil state changes. Lastly, the existing problems and research directions were also given.

Keywords

Radon emanation coefficient Radon exhalation Influencing factor Soil Temperature 

Notes

Funding information

This research was supported by “the Fundamental Research Funds for the Central Universities” (No. 2018QNA42) and the Priority Academic Program Development of Jiangsu Higher Education Institutions.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process of the Ministry of EducationChina University of Mining and TechnologyXuzhouPeople’s Republic of China
  2. 2.School of Resources and GeosciencesChina University of Mining and TechnologyXuzhouPeople’s Republic of China

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