Hydraulic conductivity of compacted clay liners permeated with inorganic salt solutions
| Autor: | Temel Yetimoglu, Seracettin Arasan, Gonca Yilmaz |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Environmental Engineering
Materials science Electric Conductivity Mineralogy Hydrogen-Ion Concentration Pollution Solutions Permeability (earth sciences) Inorganic salts Geosynthetic clay liner Chemical engineering Hydraulic conductivity Inorganic Chemicals Electrical resistivity and conductivity Low permeability Clay Aluminum Silicates Salts Waste disposal |
| Zdroj: | Waste Management & Research: The Journal for a Sustainable Circular Economy. 26:464-473 |
| ISSN: | 1096-3669 0734-242X |
| DOI: | 10.1177/0734242x08091586 |
| Popis: | Due to their low permeability, geosynthetic clay liners (GCLs) and compacted clay liners (CCLs) are the main materials used in waste disposal landfills. The hydraulic conductivity of GCLs and CCLs is closely related to the chemistry of the permeant fluid. In this study, the effect on the hydraulic conductivity of clays of five different inorganic salt solutions as permeant fluid was experimentally investigated. For this purpose, NaCl, NH4Cl, KCl, CaCl2, and FeCl 3 inorganic salt solutions were used at concentrations of 0.01, 0.10, 0.25, 0.50, 0.75 and 1 M. Laboratory hydraulic conductivity tests were conducted on low plasticity (CL) and high plasticity (CH) compacted raw clays. The change in electrical conductivity and pH values of the clay samples with inorganic salt solutions were also determined. The experimental test results indicated that the effect of inorganic salt solutions on CL clay was different from that on CH clay. The hydraulic conductivity was found to increase for CH clay when the salt concentrations increased whereas when the salt concentrations were increased, the hydraulic conductivity decreased for the CL clay. |
| Databáze: | OpenAIRE |
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