초록

용어보기논문에서 용어와 풀이말을 자동 추출한 결과로, 시범 서비스 중입니다. AI-Helper

Abstract ▼ AI-Helper

Underground Injection Control regulations for Class I injection wells require that the vertical diffusion be considered as a mechanism for transport of contaminants in evaluating containment. Due to the low permeability in the confining aquitard, the movement of contaminants over the long term is co...

Underground Injection Control regulations for Class I injection wells require that the vertical diffusion be considered as a mechanism for transport of contaminants in evaluating containment. Due to the low permeability in the confining aquitard, the movement of contaminants over the long term is controlled by the molecular diffusion. The movement can be predicted, using the Fick’s second law of diffusion. The diffusion coefficient in Fick’s law has been determined experimentally in this study. Instantaneous injection of ⁵¹Cr was used to trace the distribution of Cr(Ⅵ) in soil plugs and an analytical solution was applied to calculate the diffusion coefficients. This study shows the effect of environmental factors, such as temperature, chloride concentration, applied amount of ⁵¹Cr, and bulk density of injection formations on diffusion of Cr(Ⅵ).