All MSW leachates are different. PVC has successfully been used to contain MSW leachate since the 1970's.
In Lycoming County PA, PVC that had been exposed to leachate in a leachate pond for 13 years was tested and found to be marginally more flexible than the PVC material that was exposed to leachate.
In "Laboratory Aging of Geomembranes in Municipal Landfill Leachates" two different geomembranes were tested in two different MSW leachates and water. Two PVC geomembranes (one with DOP and one with ethylene copolymer/vinyl acetate plasticizers) and one HDPE geomembrane were evaluated. After 16 months at room temperature and 3.5 months at 50 degrees C., both PVC and HDPE show good resistance. Burst test show small changes in HDPE, no changes in PVC. Infrared (IR) Spectrophotometer shows PVC affected to a depth of 80 um (loss of plasticizer) and HDPE affected to a depth of 100 um (loss of plasticizer).
In "Assessment on a PVC Geomembrane in a Waste Disposal After 10 Years" Fayoux evaluates an uncovered 40 mil PVC geomembrane used to contain MSW leachate for 10 years. The liner was, therefore, exposed to UV radiation and/or leachate. The loss of plasticizer was less (averaging only .35%/year) in PVC under the leachate than in PVC exposed to UV radiation. The loss of Plasticizer was, in fact, essentially negligible as if the PVC had been submersed in plain water.
EXPOSURE OF PVC GEOMEMBRANE TO MSW LEACHATE
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