Experiment on monitoring leakage of landfill leachate by parallel potentiometric monitoring method

Abstract

The accumulation of municipal solid waste (MSW) in landfills often becomes a serious pollution source of geological environment and groundwater. The geological environment is the carrier of the landfill, and also the main pollution object of the landfill. The main pollution modes of the landfill site to the surrounding geological environment are purging, flushing, leachate, etc. If the leachate leakage cannot be found and repaired in time, it will cause serious harm to the geological environment and groundwater. The cost of geological environment and groundwater sampling through borehole surveys is high. Therefore, monitoring the seepage path and migration law of leachate is of great significance for determining the pollution range of the landfill site. In this study, by adjusting the grids of different sizes and changing the flow rate of leachate, the monitoring of fluid migration of different types of leachate was strengthened. The results show that the parallel potential monitoring method can quickly reflect the location and number of leachate points and the migration law of leachate. It provides effective reference data for landfill leachate monitoring.

Characterization of Dismissed Landfills via Geophysical Techniques

“…Other study cases refer to the use of ERT [30][31][32][33], EMI [34][35][36][37], or a combination of several techniques, included GPR [38], IP and SP [39], and electrical and seismic data [40] for mapping of leachate accumulation zones. Such techniques have also been applied for monitoring the leachate flow [41][42][43][44][45][46][47][48][49][50][51][52][53][54], monitoring leachate injection and recirculation to enhance waste biodegradation [55][56][57][58][59], and identifying heavy metal sludge disposal [60,61]. Finally, widespread literature reports geophysical applications for estimating water content [62][63][64][65][66], mapping biogeochemically active zones in waste deposits through IP [67], inferring subsurface gas dynamics and gas emissions [68,69] and detecting groundwater contamination induced from leachate percolation [70,71].…”