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Experiment on monitoring leakage of landfill leachate by parallel potentiometric monitoring method
Summary
Researchers tested a parallel electrical potential monitoring method to track the movement of leachate — the contaminated liquid that seeps out of landfills — through the ground, finding it accurately located leakage points and mapped migration pathways. Since landfill leachate contains microplastics, better monitoring tools help identify and contain a key source of plastic particle contamination in groundwater.
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.
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