Acid induced degradation of the bentonite component used in geosynthetic clay liners

Liu, Yang, Gates, Will P. and Bouazza, Abdelmalek 2013, Acid induced degradation of the bentonite component used in geosynthetic clay liners, Geotextiles and geomembranes, vol. 36, pp. 71-80, doi: 10.1016/j.geotexmem.2012.10.011.

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Title Acid induced degradation of the bentonite component used in geosynthetic clay liners
Author(s) Liu, Yang
Gates, Will P.ORCID iD for Gates, Will P.
Bouazza, Abdelmalek
Journal name Geotextiles and geomembranes
Volume number 36
Start page 71
End page 80
Total pages 10
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2013-02-01
ISSN 0266-1144
Summary Bentonite is a natural clay mineral widely used in the mining and solid waste containment industry, for example, as a soil mixture for the construction of seepage barriers, or as a component of geosynthetic clay liners (GCLs), to provide low hydraulic conductivity. However, degradation of bentonites generally occurs when permeated with acid solutions, such as encountered in mining applications, which may influence physical properties, and particularly, the hydraulic performance of geosynthetic clay liners.In this paper, properties such as Atterberg limits, free swell index, and fluid loss of three bentonites were measured with different concentrations of sulphuric acid solutions. These properties were found to deteriorate even with low (0.015 M) sulphuric acid solutions; higher concentrations (up to 1 M) resulted in larger degradation. X-ray diffraction and infrared spectroscopy were used to monitor the change of bentonites after interaction with the acid solutions. Acid leachates in general result in the overall degradation of the hydraulic performance of geosynthetic clay liners and potentially, any bentonite-soil mixture.
Language eng
DOI 10.1016/j.geotexmem.2012.10.011
Field of Research 090501 Civil Geotechnical Engineering
0905 Civil Engineering
Socio Economic Objective 960908 Mining Land and Water Management
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Grant ID N/A
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Document type: Journal Article
Collections: Institute for Frontier Materials
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