2001 Volume 45 Pages 175-180
Among many technologies for decontaminating soil and groundwater, electrokinetic remediation is gaining increasing attention. Before implementing it in the actual field, numerical simulations are indispensable to optimize running conditions. A few models have been developed already. These models have not included dissolution of soil particles, and adsorption phenomena etc. Therefore, the purpose of our research is to develop a new model for electroremediation, which will be able to be used under actual soil condition. We developed an ion diffusion-migration code to simulate the behavior of dissolved ions under the condition of electrical potential gradient. A test for a case of instantaneously injected NaCl point source into the water solution gave results comparable to the analytical solution. This code was employed for the simulation of electromigration-diffusion transport of chemical species under electrical potential gradient in the NaCl solution. The simulation shows process that the dissolved ions migrate toward opposite charged electrode and accumulate with time. The formation process of pH jump is also shown in the numerical result.
