토질 특성을 고려한 동전기 정화시스템에서의 pH변화 해석

Abstract

Physicochemical phenomena in soils are dependent upon pH while using electrokinetic extraction for the removal of contaminants especially for heavy metals. pH variation in soils is affected by H" and OH- ions produced by an electrolytic reaction and the buffer capacity of soil. Therefore, accurate pH estimation of soil is important in the application of an electrokinetic mechanism for decontamination and an understanding of subsurface physicochemical characteristics is also required as well as considering buffer capacity for the enhanced methods application. For these, a titration test and an electrokinetic test were performed for three types of kaolinite and one illitic soil. Buffer capacity and pH distribution were measured for the four soils, and also compared with modeling results. The results of modeling showed good agreement with experimental data. It showed that four soils were affected by each soil properties like buffer capacity in electrokinetic extraction system