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A study on the hydraulic characteristics of the geosynthetic clay liners(GCL) with humic substances of leachate on the landfill.  

한영수 (서울시립대학교 환경공학부)
이재영 (서울시립대학교 환경공학부)
Publication Information
Journal of Soil and Groundwater Environment / v.7, no.1, 2002 , pp. 33-40 More about this Journal
Abstract
The study was performed to evaluate the effect of landfill leachate on the hydraulic conductivity of Geosynthetic Clay Liner (GCL) with two types of leachate. GCL used in waste landfills have a significant ability as a barrier material, however, they also have a potential danger when exposed to some organic and inorganic leachate as well as humic materials. In this study, swelling tests and hydraulic conductivity tests were performed to evaluate the effect of humic materials and landfill leachate on the hydraulic characteristics of the GCL. The result of swelling tests showed that the amount of humic materials and high electronic conductivity caused a decrease of the swelling of bentonite. This is expected to increase the hydraulic conductivity of GCL. The increasing of hydraulic conductivity observed for GCL permeated with 0-leachate was significantly higher than that of Y-leachate. This result shows that humic materials are obviously affecting with the increasing of hydraulic conductivity of GCL.
Keywords
Geosynthetic Clay Liner(GCL); Humic materials; Landfill leachate; Hydraulic Conductivity; Swelling;
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