| Popis: |
In order to find out the migration rules of radon transport in porous aquifer medium,transport process of radon in natural groundwater environment was simulated by laboratory seepage sand box experiment.This paper made in-depth discussions on the migration rules of radon in groundwater and soil and revealed the behaviours of radon in the environment.The experimental results indicated that convection dominated on the movement of radon in porous aquifer medium.The lateral migration of radon was due to not only diffusion but also carrying of groundwater, adsorption of porous medium, decay and volatilization. The lateral migration played an important part in the movement of radon.The cluster theory and microbubble theory in the existing research results were not the the principal migration mechanism of radon transport in porous aquifer medium. Release and accumulation, volatilization, decay, adsorption and convection should be the result of different periods of peak during the process of radon movement. The findings provided the scientific evidence for quantitative study of migration behaviours of radon in the underground environment and further support for the theory that the application of radon in oil and gas exploration, detection of ground fissures, earthquake monitoring and prediction and so on. |
