A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Hydraulic Conductivity of Bentonite-Polymer Geosynthetic Clay Liners to Coal Combustion Product Leachates
Experiments were conducted to evaluate the effect of coal combustion product (CCP) leachates on the hydraulic conductivity of geosynthetic clay liners (GCLs). Three commercially available GCLs were evaluated in this study. One of the GCLs contained sodium bentonite (Na-B) and two contained bentonite-polymer (B-P) composites. The B-P-1.5 contains 1.5% polymer loading and the B-P-5.5 contains 5.5% polymer loading. The GCLs were permeated with two synthetic CCP leachates, named as typical CCP (TCCP) leachate and high ionic strength (HI) leachate. Hydraulic conductivity of Na-B to TCCP leachate increased to 2.3x10-9 m/s whereas B-P-1.5 and B-P-5.5 maintained low hydraulic conductivity to TCCP leachate (<10-10 m/s). Hydraulic conductivity of Na-B and B-P-1.5 increased to >10-10 m/s to HI leachate whereas B-P-5.5 maintained low hydraulic conductivity (e.g., 4.3x10-11 m/s). These results illustrate that B-P GCL with sufficient polymer loading (>5%) can be used to manage aggressive CCP leachates.
Hydraulic Conductivity of Bentonite-Polymer Geosynthetic Clay Liners to Coal Combustion Product Leachates
Experiments were conducted to evaluate the effect of coal combustion product (CCP) leachates on the hydraulic conductivity of geosynthetic clay liners (GCLs). Three commercially available GCLs were evaluated in this study. One of the GCLs contained sodium bentonite (Na-B) and two contained bentonite-polymer (B-P) composites. The B-P-1.5 contains 1.5% polymer loading and the B-P-5.5 contains 5.5% polymer loading. The GCLs were permeated with two synthetic CCP leachates, named as typical CCP (TCCP) leachate and high ionic strength (HI) leachate. Hydraulic conductivity of Na-B to TCCP leachate increased to 2.3x10-9 m/s whereas B-P-1.5 and B-P-5.5 maintained low hydraulic conductivity to TCCP leachate (<10-10 m/s). Hydraulic conductivity of Na-B and B-P-1.5 increased to >10-10 m/s to HI leachate whereas B-P-5.5 maintained low hydraulic conductivity (e.g., 4.3x10-11 m/s). These results illustrate that B-P GCL with sufficient polymer loading (>5%) can be used to manage aggressive CCP leachates.
Hydraulic Conductivity of Bentonite-Polymer Geosynthetic Clay Liners to Coal Combustion Product Leachates
Zainab, Binte (author) / Tian, Kuo (author)
Geo-Congress 2020 ; 2020 ; Minneapolis, Minnesota
Geo-Congress 2020 ; 579-586
2020-02-21
Conference paper
Electronic Resource
English
| British Library Conference Proceedings | 2020
| British Library Conference Proceedings | 2016