Abstract
To design methods of bio-remediation and soil vapor extraction to remove gasoline, kerosene, and light oil from contaminated soils, and to estimate the results of such purification, it is important to establish the principles of gas-phase substance transfer in soil. However, few experiments on gas phase dispersion in soil have been published to date. Therefore column experiments on the dispersion of oxygen and nitrogen or nitrogen and carbon dioxide were carried out with Toyoura sand of volumetric moisture content 0%. This study found peculiarities in the flow direction of gas phase dispersion in soil. Using the results of this study, the dispersivity and the molecular diffusion could be determined by means of dispersivity theory. The results suggest that the theory of dispersivity applied to substance transfer in underground water can also be applied to the dispersion of gas components in the gas-phase of soil.
