危废渣库高浓度氟化物在非均质含水层中的迁移模拟分析

Transportation Numerical Simulation Analysis on High Concentration Fluoride of Dangerous Waste Repository in the Heterogeneous Aquifers

近年来,随着水电铝技术的发展,国际先进水平的400ka系列铝电解槽工艺技术已成为水电铝项目的核心技术。水电铝项目中电解槽渣含有大量氟化物,是典型的危险废物,危废渣库防渗及泄漏问题成为了地下水污染防治及保护的重点。本文以某水电铝厂区危废渣库地下水环境影响评价为例,通过对研究区进行水文地质调查及分析基础上,建立研究区渗流模型及污染物迁移模型,在此基础上设定不同情景并模拟不同防渗条件下危废渣库泄漏的污染羽状物迁移情况。研究结果表明高浓度氟化物迁移方向及扩散面积主要受含水层非均质性、危废渣库泄漏持续时间及防渗效果等因素的影响。

In recent years,with the development of hydro- aluminum technology,the international advanced level of 400 ka series aluminum electrolytic cell technology,become a core technology of the project of the hydropower aluminum. In the hydro aluminum project the electrolyses slag contains a lot of fluoride that is typical of hazardous waste. Dangerous waste repository seepage and leakage problems become the focus of the groundwater pollution prevention and protection. In this paper,a hydro aluminum factory district library of dangerous waste residue of groundwater environment impact assessment,for example.In the study area based on hydro geological investigation and analysis,established a seepage flow model and pollutant migration model in the study area. Set on the basis of the different scenarios and simulation of the dangerous waste repository under the conditions of different anti- seepage leakage pollution plume migration. The results showed that high concentration of fluoride migration direction and diffusion area was influenced of the main aquifer heterogeneity,duration of dangerous waste repository leakage and seepage control effect etc factors.