摘要
为研究某渣场污染物对周边地下水的污染状况,通过对渣场场地非饱和土壤弥散、渗流特性试验,并运用模拟地下水溶质迁移的软件Comsol Multiphysics建立渣场污染物在非饱和岩土介质中的迁移模拟计算模型。试验结果表明:土壤水扩散率D(θ)和非吸附性溶质Cl-1的水动力弥散系数Dsh(θ)与土壤含水率θ成显著幂函数关系;同一吸力水头下,黏粒含量越高,储水能力越强,脱水速度越慢,即黏土②土样其持水性能远远高于熔炼渣①土样。100年内渣场污染物氟和锌的迁移污染对周边地下水污染浓度满足二类水标准;通过对渣场周边地下水试验结果表明:渣场现状下对周边地下水并未形成污染,这也验证了采用Comsol Multiphysics软件对渣场污染物迁移模拟分析的可靠性。
In order to study the pollution of surrounding underground water caused by pollutant of a slag dump, dispersion and seepage characteristics test was conducted on unsaturated soil of the slag dump and used Comsol Multiphysics, a software simulating migration of underground water solute to establish a slag dump pollutant migration imitation calculation model for unsaturated geotechnical materials. Test results show that water diffusion coefficient D（θ） and hydrodynamic force dispersion coefficient Dsh（θ） of non-absorptive solute C 1-1 and soil water ratio θ are of obvious power function relation. Under the same suction water head, with the higher content of clay, the higher water beating performance and the slower dewatering velocity, and water bearing performance of clay ② sample is far higher than that of slag ①sample. In the future 100 years, pollution level of surrounding underground water caused by migration of pollutant fluorine and zinc in the slag dump will meet Class II water standard. Currently, the slag dump does not pollute underground water surrounding it. It also proves the reliability of Comsol Multiphysics software when it is used to simulate and analyze slag dump pollutant migration.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期2173-2180,共8页
Journal of Central South University:Science and Technology
基金
云南省自然科学基金资助项目(99D0023M)
云南省教育厅科学研究基金重大专项(14051320)
关键词
渣场
污染物迁移
非饱和岩土介质
弥散特性试验
渗流特性试验
slag dump
pollutant migration
unsaturated geotechnical materials
dispersion characteristic test
seepage characteristic test
