Numerical analysis for electrokinetic soil processing enhanced by chemical conditioning of the electrode reservoirs.
A numerical analysis was undertaken for enhanced electrokinetic soil processing. To perform chemical conditioning of the electrode reservoirs, the electrokinetic soil process employed a membrane as a barrier between the electrode reservoirs and the contaminated soil. An alkaline solution was purged in the anode reservoir that was bounded by the membrane. A mathematical model was used for demonstration of pH change and phenol removal from a kaolinite soil bed, the prediction of pH variations in both electrode reservoirs, and the determination of an optimized injection time of the anode-purging solution. The time-dependent dispersion coefficient was employed in consideration of the averaging effect of the velocity profile on a one-dimensional transport. The estimation of pH and phenol profiles in the soil bed reasonably agreed with the experimental data. The simulation revealed that the removal efficiency of phenol from the kaolinite soil could be improved by maintaining pH of the anode solution.
Park
Jin-Soo
JS
Department of Environmental Science and Engineering, Kwangju Institute of Science and Technology (K-JIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, South Korea.
Kim
Soon-Oh
SO
Kim
Kyoung-Woong
KW
Kim
Byung Ro
BR
Moon
Seung-Hyeon
SH
D004202:Disinfectants / Q000302:isolation & purification*; D004563:Electrochemistry; D004566:Electrodes; D004787:Environmental Pollution / Q000517:prevention & control*; D006863:Hydrogen-Ion Concentration; D007616:Kaolin; D007700:Kinetics; D008962:Models, Theoretical; D019800:Phenol / Q000302:isolation & purification*; D012989:Soil Pollutants
D004202:Disinfectants; D012989:Soil Pollutants; D007616:Kaolin; D019800:Phenol