高浊高铁锰矿井水中污染物在采空区内的迁移扩散

Migration and Diffusion of Pollutants in the Mine Water with High Turbidity,High Concentration of Iron and Manganese in Goaf

为揭示高浊高铁锰矿井水中污染物在采空区内的迁移扩散规律,以采空区充填物为载体,进行了相应的动力学参数和动态迁移实验.结果表明:采空区充填物的弥散系数和吸附常数分别为D=3.12 m2/d,Kd(Fe)=11.07 mL/g,Kd(Mn)=7.543 mL/g;在连续运行条件下,距进水口0.5 m处,铁的去除率大于95%,浊度的去除率接近90%,但锰的去除率仅为40%,说明利用采空区充填物除锰时容易达到吸附饱和.建立了铁、锰在采空区内的迁移扩散模型,最大的误差仅为8.44%.该模型可进行迁移扩散预测,为设计参数的确定提供基础.

In order to study migration and diffusion law of pollutants in the mine water with high turbidity, high concentration of iron and manganese in goaf, the kinetic parameters and dynamic migration experiments were completed by taking filling as carrier in goaf. The dispersion coefficient D of 3.12 m^2/d, adsorption coefficient of filling Ka （Fe） of 11.07 mL/g and Kd （Mn） of 7. 543 mL/g were achieved, respectively. The results shows that under the condition of continuous treatment, removal efficiency of iron was larger than 95% and that of turbidity was about 90% within 0. 5 m of water inlet. And the removal efficiency of manganese is only 40%, which indicates that the filling used to remove manganese reached absorption saturation easily. A migration and diffusion model was proposed with the biggest error of 8.44%. The model can he used to select design parameters and predict migration and diffusion of pollutants in goaf.