CAJ | 학술논문

在铀尾矿地区溶解态U(Ⅵ)渗漏到含水层中对周围环境造成严重的威胁。本研究利用反应运移软件PHT3D对U(Ⅵ)吸附实验进行模拟，并与传统Kd吸附经验模型进行对比。模拟结果表明：传统 Kd吸附经验模型在地球化学条件发生变化时无法刻画表面吸附的动态变化；由表面络合模型计算的 Kd值在时空是不断变化的，其更接近实际中多变水化学条件下的吸附；应用PHT3 D进行反应模拟能够在复杂地下水流条件中获得较好的效果。
재유미광지구용해태U(Ⅵ)삼루도함수층중대주위배경조성엄중적위협。본연구이용반응운이연건PHT3D대U(Ⅵ)흡부실험진행모의，병여전통Kd흡부경험모형진행대비。모의결과표명：전통 Kd흡부경험모형재지구화학조건발생변화시무법각화표면흡부적동태변화；유표면락합모형계산적 Kd치재시공시불단변화적，기경접근실제중다변수화학조건하적흡부；응용PHT3 D진행반응모의능구재복잡지하수류조건중획득교호적효과。
In uranium tailings area, the adsorption of hexavalent uranium on its migration would heavily threaten the environ-ment and human health. In this study, a numerical example was demonstrated using the reactive transport model PHT3D based on surface complexation to simulate the uranium (Ⅵ) adsorption and migration. The reactive transport simulation results are com-pared to those using traditional constant Kd adsorption model. This study shows that Kd computed with PHT3D are varied with time and space while the geochemistry condition changed. The surface complexation model( SCM) used in the PHT3D reactive transport simulation could be more accurate in complex flow field than constant Kd adsorption model used in MT3DMS.