野外における汚染土壌及び廃棄物の電気的特性

抄録

We report the results from three geo-electrical surveys carried out in a hydrocarbon-contaminated site, a volatile organic compound-contaminated site and a waste disposal site, respectively. In these cases, polluted soil and waste deposits show the electrical properties unlike those estimated from the original source. We try to explain these phenomena from the geo-electrochemical change caused by geochemical and biochemical decomposition. We conclude that induced polarization (IP) method from which many geo-electrical information (resistivity and some IP parameters) is obtained is effective in the investigation of contaminated soil and wastes. Moreover, the time-differential tomography which observes a temporal change of geo-electrical properties is also useful in above investigations. We expect that these geo-electrical information will be applied to the wide field including not only detection of the contaminated soil, but also monitoring of pollutants in ground and evaluation of hydraulic parameters for behaviour prediction and repair design of pollutant in soil.