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Geosentetik Kil Örtülerin (GKÖ) Kömür Külü Ve Soda Külü Sızıntı Sularına Karşı Hidrolik Iletkenliği
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Geosentetik Kil Örtülerin (GKÖ) Kömür Külü Ve Soda Külü Sızıntı Sularına Karşı Hidrolik Iletkenliği
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Dissertation
Geosentetik Kil Örtülerin (GKÖ) Kömür Külü Ve Soda Külü Sızıntı Sularına Karşı Hidrolik Iletkenliği
2023
Overview
In this study, tests were conducted to investigate the influence of coal combustion product (CCP) leachates on the hydraulic conductivity of original, fiber free and artificial geosynthetic clay liners (GCLs). Sodium and polymer GCLs were permeated with two synthetic leachates representing the mining wastewater in CCP disposal facilities: coal combustion leachate (CCL), and trona ash leachate (TAL). The barrier performance of GCLs to CCL and TAL was discussed basically in terms of mass per unit area (MPUA). Regardless of GCL type, increasing the MPUA to 5.0 kg/m2 (Mb5 and MP-b5) led to a decrease in the hydraulic conductivity to CCL and TAL. However, the existence of bundles of fibers on both GCLs had a significant effect on hydraulic conductivity, especially when MPUA was low. To investigate the influence of fibers, fiber free Na-GCLs with MPUA of 3.0 kg/m2 , 4.0 kg/m2 , and 5.0 kg/m2 (Mb3FF, Mb4FF, and Mb5FF) were manufactured and subjected to hydraulic conductivity test with TAL. The hydraulic conductivity of fiber free GCLs were significantly lower that those of original GCLs. The rehydration effect was examined on Na-GCLs (Mb3 and Mb4) and using TAL. On the other hand, artificial GCLs (A-GCLs) with MPUA of 3.0 kg/m2 , 5.0 kg/m2 , and 7.0 kg/m2 were manufactured with needle-punching apparatus in the laboratory. The equipment was efficient to manufacture artificial GCLs. According to test results, it was seen that the effect of MPUA and bundles of fibers on the barrier performance of GCLs were significant in terms hydraulic conductivity to CCL and TAL.
