The effect of some soil physical parameters on soil radon concentration and radon exhalation from soil surface

Objective To analyse the impacts of soil characters on radon concentration in soil and radon exhalation from soil. Methods Field measurements on soil radon concentration(60 cm under the soil surface) and radon exhalation rate from soil were carried out in totally 31 different types of soil samples collected from three cities in both South and North China.Soil radium contents,water contents,soil porosity and grain size were concretely analysed in our laboratory.The linear simulation was used to analyse the measurement data. Results Radon exhalation rate from soil and radon concentrations in soil had direct proportion to soil radium contents.No high soil radon concentration was gotten as expected in Guiyang area where soil radium content was high. Conclusion Compared with soil radium contents,radon exhalation rate from soil and soil radon concentration are more easily impacted by soil characters and changes in a rather large range.\;