Solute Diffusion through Bentonite-Polymer Composites for Containment Applications
Publication: Geo-Congress 2023
ABSTRACT
Bentonite-polymer composites (BPC) have been developed for use in geoenvironmental containment projects where sodium bentonite (NaB) is likely to undergo adverse chemical interactions that degrade barrier performance. Although numerous studies have investigated hydraulic conductivity of BPCs, very little is known about diffusion rates through BPC. Thus, this experimental study measured solute diffusion through different BPC materials for calcium chloride (CaCl2) source solutions ranging in concentration (Co) from 10 to 100 mM. The five materials evaluated in the study were NaB (without polymer amendment), BPC 1%–4% and BPC 1–8% (BPC type 1 with 4% and 8% polymer, respectively), and BPC 2%–4% and BPC 2%–8% (BPC type 2 with 4% and 8% polymer). For dilute CaCl2 solutions, all four BPCs exhibited lower Da values (by half an order of magnitude) than the unamended NaB. For higher CaCl2 concentrations (Co = 100 mM) the BPC2 mixes still exhibited superior performance (lower Da) relative to NaB, whereas the BPC1 mixes exhibited similar or in some cases higher Da values than the unamended NaB. The results of the study enhance our ability to consider and predict the expected performance of containment barriers comprising either NaB or BPC for a range of ionic strengths.
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REFERENCES
Anders, O. U., Bartel, J. F., and Altschuler, S. J. (1978). “Determination of the leachability of solids.” Analytical Chemistry, 50(4):=, 564–569.
ANSI/ANS (American National Standards Institute/American Nuclear Society). (2008). Measurement of the leachability of solidified low level radioactive wastes by a short-term test procedure. ANSI/ANS-6.1-2003-R2008. American National Standards Institute/American Nuclear Society (ANSI/ANS), New York.
ASTM. (2018). ASTM D 7503-18 Standard test method for measuring the exchange complex and cation exchange capacity of inorganic fine-grained soils. ASTM International, West Conshohocken, PA.
Ashmawy, A. K., El-Hajji, D., Sotelo, N., and Muhammad, N. (2002). “Hydraulic performance of untreated and polymer-treated bentonite in inorganic landfill leachates.” Clays Clay Miner., 50(5), 546–552.
Athanassopoulos, C., Benson, C., Chen, J., and Donovan, M. (2015). “Hydraulic conductivity of a polymer-modified GCL permeated with high-pH solutions.” Geosynthetics, IFAI, 181–186.
Bohnhoff, G. L., and Shackelford, C. D. (2015). “Salt diffusion through a bentonite-polymer composite.” Clays Clay Miner., 63(3), 145–162.
Bohnhoff, G. L., Shackelford, C. D., and Sample-Lord, K. (2014). “Calcium-resistant membrane behavior of polymerized bentonite.” J. Geotech. Geoenviron. Eng., 140(3), 04013029.
Chai, J.-C., and Prongmanee, N. (2020). “Barrier properties of a geosynthetic clay liner using polymerized sodium bentonite.” Geotextiles and Geomembranes, 48(3), 392–399.
Chen, J., Salihoglu, H., Benson, C., Likos, W., and Edil, T. (2019). “Hydraulic conductivity of bentonite-polymer composite geosynthetic clay liners permeated with coal combustion product leachates.” J. Geotech. Geoenviron. Eng., 145(9), 04019038.
Egloffstein, T. (2002). “Bentonite as sealing material in geosynthetic clay liners—Influence of the electrolytic concentration, the ion exchange and ion exchange with simultaneous partial desiccation on permeability.” Proc., Int. Symp. on Clay Geosynthetic Barriers, H. Zanzinger, R. Koerner, and E. Gartung, eds., Balkema, Rotterdam, Netherlands, 141–153.
Geng, W., Likos, W., and Benson, C. (2016). “Viscosity of polymer-modified bentonite as a hydraulic performance index.” Geo-Chicago 2016, ASCE, Chicago, Illinois, 498–507.
Godbee, H. W., Compere, E. L., Joy, D. S., Kibbey, A. H., Moore, J. G., and Nestor, C. W. (1980). “Application of mass transport theory to the leaching of radionuclides from waste solids.” Nuclear and Chemical Waste Management, 1, 29–35.
Gustitus, S., and Benson, C. (2020). “Assessing polymer elution and hydraulic conductivity of bentonite-polymer composite geosynthetics clay liners permeated with aggressive solutions.” Proceedings of GeoAmericas 2020, Rio de Janeiro, Brazil, 26-29 April, 2020.
Jo, H., Benson, C., and Edil, T. (2004). “Hydraulic conductivity and cation exchange in non-prehydrated and prehydrated bentonite permeated with weak inorganic salt solutions.” Clays Clay Miner., 52(6): 661–679.
Jo, H., Benson, C., Shackelford, C., Lee, J.-M., and Edil, T. (2005). “Long-term hydraulic conductivity of a geosynthetic clay liner permeated with inorganic salt solutions.” J. Geotech. Geoenviron. Eng., 131(4), 405–417.
Jo, H., Katsumi, T., Benson, C., and Edil, T. (2001). “Hydraulic conductivity and swelling of non-prehydrated GCLs permeated with single species salt solutions.” J. Geotech. Geoenviron. Eng., 127(7), 557–567.
Kolstad, D., Benson, C., and Edil, T. (2004). “Hydraulic conductivity and swell of nonprehydrated geosynthetic clay liners permeated with multispecies inorganic solutions.” J. Geotech. Geoenviron. Eng., 130(12), 1236–1249.
Lake, C., and Rowe, R. (2000). “Diffusion of sodium and chloride through geosynthetic clay liners.” Geotextiles and Geomembranes, 18(2-4), 103–131.
Lee, J., and Shackelford, C. (2005). “Impact of bentonite quality on hydraulic conductivity of geosynthetic clay liners.” J. Geotech. Geoenviron. Eng., 131(1), 64–77.
Li, Q., Chen, J., Benson, C. H., and Peng, D. (2021). “Hydraulic conductivity of bentonite-polymer composite geosynthetic clay liners permeated with bauxite liquor.” Geotextiles and Geomembranes, 49(2), 420–429.
Malusis, M., Shackelford, C., and Olsen, H. (2003). “Flow and transport through clay membrane barriers.” Engineering Geology, 70(3–4), 235–248.
Nathwani, J., and Phillips, C. (1978). “Rates of leaching of radium from conta- minated soils: an experimental investigation of radium bearing soils from Port Hope, Ontario.” Water, Air, and Soil Pollution, 9(4), 453–465.
Nestor, C. (1980). “Diffusion from solid cylinders.”, Oak Ridge National Laboratory, Oak Ridge, Tenn.
Norris, A., Aghazamani, N., Scalia, J., and Shackelford, C. (2022). “Hydraulic performance of geosynthetic clay liners comprising anionic polymer–enhanced bentonites.” J. Geotech. Geoenviron. Eng., 148(6), 04022039.
Petrov, R., and Rowe, R. (1997). “Geosynthetic clay liner (GCL)—Chemical compatibility by hydraulic conductivity testing and factors impacting its performance.” Can. Geotech. J., 34(6), 863–885.
Prongmanee, N., and Chai, J.-C. (2019). “Performance of geosynthetic clay liner with polymerized bentonite in highly acidic or alkaline solutions.” Int. J. of Geosynth. and Ground Eng., 5 (3): 26.
Prongmanee, N., Chai, J.-C., and Shen, S. (2018). “Hydraulic properties of polymerized bentonites.” J. Mater. Civ. Eng., 30(10), 04018247.
Quaranta, J., Gabr, M., and Bowders, J. (1997). “First-exposure performance of the bentonite component of a GCL in a low-pH, calcium-enriched environment.” Testing and Acceptance Criteria for Geosynthetic Clay Liners, L. Well, ed., ASTM, West Conshohocken, PA.
Rowe, R. K., Caers, C. J., and Barone, F. (1988). “Laboratory determination of diffusion and distribution coefficients of contaminants using undisturbed clayey soil.” Can. Geotech. J., 25(1), 108–1185.
Rowe, R. K., Quigley, R. M., Brachman, R. W., and Booker, J. R. (2004). Barrier systems for waster disposal facilities, 2nd Ed., CRC Press Taylor & Francis Group, Boca Raton, FL.
Ruhl, J., and Daniel, D. (1997). “Geosynthetic clay liners permeated with chemical solutions and leachates.” J. Geotech. Geoenviron. Eng., https://doi.org/10.1061/(ASCE)1090-0241(1997)123:4(369), 369–381.
Salemi, N., Abtahi, S. M., Rowshanzamir, M., and Hejazi, S. M. (2018). “Geosynthetic clay liners: Effect of structural properties and additives on hydraulic performance and durability.” Environmental Earth Sciences, 77, pp. 1–13.
Sample-Lord, K. M., and Shackelford, C. D. (2016). “Solute diffusion in bentonite pastes.” J. Geotech. Geoenviron. Eng., 142(8), 1–12.
Sample-Lord, K. M., Bohnhoff, G. L., and Tong, S. (2017). “Diffusion of calcium chloride through polymerized bentonite.” In Geotechnical Frontiers 2017, GSP 276:200–208.
Scalia, J., Benson, C., Bohnhoff, G., Edil, T., and Shackelford, C. (2014). “Long-term hydraulic conductivity of a bentonite-polymer composite permeated with aggressive inorganic solutions.” J. Geotech. Geoenviron. Eng., 140, 1–13.
Shackelford, C. (2014). “The ISSMGE Kerry Rowe Lecture: The role of diffusion in environmental geotechnics.” Can. Geotech. J., 51(11), 1219–1242.
Shackelford, C. D., Benson, C. H., Katsumi, T., Edil, T., and Lin, L. (2000). “Evaluating the hydraulic conductivity of GCLs permeated with non-standard liquids.” Geotextiles and Geomembranes, 18(2–4), 133–161.
Shackelford, C. D., and Daniel, D. E. (1991). “Diffusion in Saturated Soil. I: Background.” Journal of Geotechnical Engineering, 117(3), 467–484.
Tian, K., and Benson, C. H. (2019). “Containing bauxite liquor using bentonite-polymer composite geosynthetic clay liners.” Proc. 8th International Congress on Environmental Geotechnics, vol 2.
Tian, K., Benson, C., and Likos, W. (2016). “Hydraulic conductivity of geosynthetic clay liners to low-level radioactive waste leachate.” J. Geotech. Geoenviron. Eng., 142 (8): 04016037.
Tian, K., Likos, W., and Benson, C. (2016). “Pore-scale imaging of polymer-modified bentonite in saline solutions.” Geo-Chicago 2016, Chicago, Illinois, 468–477.
Tian, K., Likos, W., and Benson, C. (2019). “Polymer elution and hydraulic conductivity of bentonite–polymer composite geosynthetic clay liners.” J. Geotech. Geoenviron. Eng., 145(10), 04019071.
Tong, S., Sample-Lord, K., Bohnhoff, G., Balken, A., and Ahmed, M. (2019). “Dialysis method to measure diffusion in sodium and enhanced bentonites.” Geoenvironmental Engineering and Sustainability, C. Meehan, S. Kumar, and M. Pando, Eds., GSP 312, ASCE, Reston, VA, 12–21.
Tong, S., Sample-Lord, K., and Bohnhoff, G. (2021). “Diffusion through sodium and polymer enhanced bentonites exposed to dilute and aggressive solutions.” Can. Geotech. J., 58(5), 603–618.
Tong, S., Sample-Lord, K., Bohnhoff, G., and Balken, A. (2018). “Salt diffusion through sodium bentonite and bentonite polymer composite.” 8th International Congress on Environmental Geotechnics (ICEG8), Hangzhou, China, Oct. 28-Nov.1, 2018.
Vasko, S., Jo, H., Benson, C., Edil, T., and Katsumi, T. (2001). “Hydraulic conductivity of partially prehydrated geosynthetic clay liners permeated with aqueous calcium chloride solutions.” Proc., Geosynthetics Industrial Fabrics Association International (IFAI), Roseville, MN, 685–699.
Wireko, C., Abichou, T., Tian, K., Zainab, B., and Zhang, Z. (2022). “Effect of incineration ash leachates on the hydraulic conductivity of bentonite-polymer composite geosynthetic clay liners.” Waste Management, 139, 25–38.
Yu, C., Liao, R., Cai, X., and Yu, X. (2019). “Sodium polyacrylate modification method to improve the permeant performance of bentonite in chemical resistance.” J. Cleaner Production, 213, 242–250.
Zainab, B., Wireko, C., Li, D., Tian, K., and Abichou, T. (2021). “Hydraulic conductivity of bentonite-polymer geosynthetic clay liners to coal combustion product leachates.” Geotextiles and Geomembranes, 49(5), 1129–1138.
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Published online: Mar 23, 2023
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