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运用动电技术在衬垫两侧施加电场,通过重金属电渗透和电迁移作用能够有效地降低污染物向下迁移,达到减小黏土衬垫厚度、增加库容以及延长黏土衬垫的使用寿命。为了有效模拟动电技术于垃圾填埋场衬垫层的运用机理,开发出具有水力系统、加电系统和监测系统的室内黏土动电修复模拟试验装置。该装置结构简单,操作方便,能很好地模拟动电施加过程,可观测渗流场、浓度场与动电场共同作用下衬垫系统内重金属离子的迁移性状,可用来研究参数变化对动电修复效果的影响。利用该装置的获得试验结果与计算结果非常吻合,验证了该试验装置的有效性。
Applying electric field on both sides of the liner by electrokinetic technology can effectively reduce the downward migration of pollutants through heavy metal electroosmosis and electromigration, thus reducing the thickness of clay liner, increasing the storage capacity and prolonging the service life of clay liner. In order to effectively simulate the application mechanism of electrokinetic technology in the landfill liner, a simulation test device for indoor clay electrokinetic remediation with hydraulic system, power-on system and monitoring system has been developed. The device has the advantages of simple structure and convenient operation, and can well simulate the dynamic application process. The migration of heavy metal ions in the gasket system can be observed under the interaction of seepage field, concentration field and dynamic electric field, Effect of effect. The experimental results obtained by the device are in good agreement with the calculated results, which verify the validity of the experimental device.