Resistivity change during transport of heavy metal in sand

A resistivity cone technique was developed to monitor the transport of hazardous substances in soils. This study examines the feasibility of the monitoring technique. In order to achieve this, the change in resistivity during transport of heavy metals was measured using sandy soils and a resistivity cone. The resistivity usually decreases with increasing heavy metal concentration in pore water. However, the retardation effect provided the increase in resistivity when metal solution diluted with distilled water was infiltrated into sand-fresh water system. The change in resistivity resulting from the retardation is discussed in this paper.