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Title: | Water-holding properties of clinoptilolite/sodium polyacrylate-modified compacted clay cover of tailing pond | Authors: | Sun, XP Ding, ZH Bi, YZ Wang, XY |
Issue Date: | Dec-2022 | Source: | International journal of environmental research and public health, Dec. 2022, v. 19, no. 23, 15554 | Abstract: | Clinoptilolite and sodium polyacrylate (Na-PAA) were used as water-retaining agents to improve the water-holding capacity of compacted clay cover (CCC). The optimum moisture content and Atterberg limits of the CCC modified by clinoptilolite and Na-PAA were studied. The soil–water characteristic curve (SWCC) of the CCC modified by clinoptilolite and Na-PAA was studied. The mesostructure of the CCC was analyzed by polarized light microscopy. The test results show that: (1) the optimum moisture content and liquid limit of the CCC modified by clinoptilolite and Na-PAA increased, while the maximum dry density decreased; (2) the SWCC of the CCC modified by clinoptilolite and Na-PAA shifts to the upper right, and the volume moisture content of modified CCC is higher than that of unmodified CCC under the same matrix suction; (3) compared with the unmodified CCC, the air-entry value (AEV) of the clinoptilolite-modified CCC increased by 65.18% at most, and the AEV of the further modified CCC with Na-PAA in-creased by about two times; and (4) the flocculation structure and porosity of modified CCC decreased, and the porosity was distributed uniformly. | Keywords: | Clinoptilolite Sodium polyacrylate (Na-PAA) Soil–water characteristic curve Tailing pond Water-holding capacity |
Publisher: | Molecular Diversity Preservation International (MDPI) | Journal: | International journal of environmental research and public health | ISSN: | 1661-7827 | EISSN: | 1660-4601 | DOI: | 10.3390/ijerph192315554 | Rights: | © 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). The following publication Sun X-P, Ding Z-H, Bi Y-Z, Wang X-Y. Water-Holding Properties of Clinoptilolite/Sodium Polyacrylate-Modified Compacted Clay Cover of Tailing Pond. International Journal of Environmental Research and Public Health. 2022; 19(23):15554 is available at https://doi.org/10.3390/ijerph192315554. |
Appears in Collections: | Journal/Magazine Article |
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ijerph-19-15554-v2.pdf | 8.45 MB | Adobe PDF | View/Open |
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