BARRIER PERFORMANCE AND ITS AFFECTING FACTORS OF PVC GEOMEMBRANES AGAINST ORGANIC COMPOUNDS IN WASTE LEACHATE

Abstract

Diffusive permeation tests were conducted to evaluate barrier performane of PVC geomembranes against organic compounds in waste leachate. The partitioning coefficients became large when the organic compound had a low solubility and a high octanol-water partitioning coefficient. Most of their diffusion coefficients were approximately 10-13 m2/s, but 1,4-dioxane and bisphenol A had the lower diffusion coefficient than them. In particular, 1,4-dioxane could not pass through PVC geomembranes at all in testing duration of 2 weeks.