土壤中氡浓度检测及其影响因素

综合相关文献研究,通过工程实例介绍土壤中氡气浓度的检测方法,对检测结果进行统计学分析,根据分析结果探讨不同土壤中氡浓度差异及其影响因素。结果显示:土壤孔隙度是影响土壤中氡气浓度的关键因素。不同类型的表层土壤,孔隙度不同,所含氡气浓度也不同。当表层土壤为房渣土、填土时,土质夯实,孔隙率低,氡浓度含量较低;表层土壤为粉土、粉质粘土时,土质较均匀,土层较疏松,孔隙度略大,土壤氡浓度大于前者;表层土壤为粉砂、细砂时,土层更为疏松,土壤中孔隙度再次增大,氡在土壤中有大量的存储空间,所含的氡浓度最大。因此,土壤的孔隙度大小影响氡从地下向地表渗透析出的难易程度,孔隙度越大氡越容易渗透其中,浓度就越高。

Study on Radon Concentration Measurement in Soil and Its Inlfuence Factors

To introduce the measurement method of radon concentration in soil by literature summary and a project example, this paper analyzes the influence factors of radon concentration in different kinds of soil by statistical analysis on the measurement data. The results show: the soil porosity is a key factor affecting radon concentration; for different types of surface soil, different porosity, the radon concentration is different. When the surface soil is slag soil and iflling soil, the radon concentration is low; when the surface soil is silt and silty clay, the soil is more uniform, soil porosity, the radon concentration is higher; when the surface soil is silty sand and ifne sand, the soil porosity is even more larger, and there is a large amount of storage space, the radon concentration is the largest. Therefore, the dififculty level of radon inifltration from underground to surface is related to the porosity of the soil, the higher the porosity, the more easily inifltrating for the radon.