The Application and Properties of Impermeable Materials in Solid Waste Treatment at Red Mud Yard
Journal: Architecture Engineering and Science DOI: 10.32629/aes.v5i4.3202
Abstract
Red muds pose a significant risk of environmental contamination, particularly through soil and groundwater pollution during their storage. While sodium bentonite geosynthetic clay liners (NaB GCL) have traditionally been employed extensively in red mud storage facilities, their inherent chemical sensitivity has constrained their longevity and effectiveness as a reliable barrier. This review zeroes in on the application and performance of polymer-modified bentonite geosynthetic clay liners (BPC GCL) within the context of red mud storage. The polymer modification process endows BPC GCL with a significantly reduced permeability coefficient and bolsters its chemical resistance. By subjecting BPC GCL to rigorous testing for chemical compatibility and permeability, we have been able to evaluate its efficacy in terms of impermeable and anti-fouling properties within red mud storage environments.
Keywords
bauxite leachates, red mud yard, impermeability materials, impermeability mechanism
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[3] Tian K, Benson C H. Containing Bauxite Liquor Using Bentonite-Polymer Composite Geosynthetic Clay Liners: Towards a Sustainable Geoenvironment[M]. Proceedings of the 8th International Congress on Environmental Geotechnics Volume 2. 2019: 672-678.
[4] Mazzieri F, Di Emidio G, Van Impe P O. Diffusion of calcium chloride in a modified bentonite: impact on osmotic efficiency and hydraulic conductivity[J]. Clays & Clay Minerals, 2010, 58(3): 351-363.
[5] Gholamreza, Mesri, Roy, et al. Mechanisms Controlling the Permeability of Clays[J]. Clays and Clay Minerals, 1971, 19: 151-158.
[6] Norrish K, Quirk J P. Crystalline Swelling of Montmorillonite: Use of Electrolytes to Control Swelling[J]. Nature, 1954, 173(4397): 255-256.
[7] Jo H Y, Katsumi T, Benson C H, et al. Hydraulic Conductivity and Swelling of Nonprehydrated GCLs Permeated with Single-Species Salt Solutions[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2001, 127(7): 557-567.
[8] Kolstad D C, Benson C H, Edil T B. Hydraulic Conductivity and Swell of Nonprehydrated Geosynthetic Clay Liners Permeated with Multispecies Inorganic Solutions[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2004a, 130(12): 962-962.
[9] Scalia IV J, Benson C H, Bohnhoff G L, et al. Long-Term Hydraulic Conductivity of a Bentonite-Polymer Composite Permeated with Aggressive Inorganic Solutions[J]. Journal of Geotechnical & Geoenvironmental Engineering, 2013, 140(3): 04013025.
[10] Dong X L. 2018, Study on migration mechanism and pollution intercepting performance of coal gangue leachate in geosynthetic clay liner [D]. Coal Research Institute.
[11] Malusis M A and Daniyarov A S. Membrane efficiency and diffusive tortuosity of a dense prehydrated geosynthetic clay liner[J]. Geotextiles and Geomembranes, 2016, 44(5):719-730.
[12] Scalia J I, Bareither C A, Shackelford C D. Advancing the use of geosynthetic clay liners as barriers[J]. Geotechnical Engineering, 2018, 49(4): 100-114.
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