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Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill
This paper studied the anti-seepage ability of the modified loess by using attapulgite, which is abundant in local areas. The possibility of using the modified loess as the sustainable compacted soil liner material in a solid waste landfill was also considered in this research. The materials were th...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9323807/ https://www.ncbi.nlm.nih.gov/pubmed/35888449 http://dx.doi.org/10.3390/ma15144982 |
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author | Zhang, Zhengrui Matlan, Siti Jahara Wang, Hao Pishro, Ahad Amini Zhang, Lili Gao, Xian Liang, Zhao Liu, Xiaoyi Zhao, Peigen |
author_facet | Zhang, Zhengrui Matlan, Siti Jahara Wang, Hao Pishro, Ahad Amini Zhang, Lili Gao, Xian Liang, Zhao Liu, Xiaoyi Zhao, Peigen |
author_sort | Zhang, Zhengrui |
collection | PubMed |
description | This paper studied the anti-seepage ability of the modified loess by using attapulgite, which is abundant in local areas. The possibility of using the modified loess as the sustainable compacted soil liner material in a solid waste landfill was also considered in this research. The materials were then evaluated using Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and an Impermeability Mechanism (IM). The experimental results showed that the permeability coefficient of the attapulgite-modified loess decreases significantly with increasing attapulgite content. However, it becomes less significant when the attapulgite level approaches 10%. Both cases can meet the landfill impermeability requirements, based on the attapulgite content remaining at 10%, adding 15% lime or 5% cement, respectively. The triaxial consolidation and drainage experiment was carried out to investigate the shear strength of the materials under three different working circumstances. The stress–strain curves of each specimen were produced, as were the cohesion and internal friction angle values. This research lays the groundwork for using attapulgite-modified loess as a landfill lining material. It establishes a solid platform for future studies on attapulgite adsorption and purifying performance in landfills. |
format | Online Article Text |
id | pubmed-9323807 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-93238072022-07-27 Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill Zhang, Zhengrui Matlan, Siti Jahara Wang, Hao Pishro, Ahad Amini Zhang, Lili Gao, Xian Liang, Zhao Liu, Xiaoyi Zhao, Peigen Materials (Basel) Article This paper studied the anti-seepage ability of the modified loess by using attapulgite, which is abundant in local areas. The possibility of using the modified loess as the sustainable compacted soil liner material in a solid waste landfill was also considered in this research. The materials were then evaluated using Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and an Impermeability Mechanism (IM). The experimental results showed that the permeability coefficient of the attapulgite-modified loess decreases significantly with increasing attapulgite content. However, it becomes less significant when the attapulgite level approaches 10%. Both cases can meet the landfill impermeability requirements, based on the attapulgite content remaining at 10%, adding 15% lime or 5% cement, respectively. The triaxial consolidation and drainage experiment was carried out to investigate the shear strength of the materials under three different working circumstances. The stress–strain curves of each specimen were produced, as were the cohesion and internal friction angle values. This research lays the groundwork for using attapulgite-modified loess as a landfill lining material. It establishes a solid platform for future studies on attapulgite adsorption and purifying performance in landfills. MDPI 2022-07-18 /pmc/articles/PMC9323807/ /pubmed/35888449 http://dx.doi.org/10.3390/ma15144982 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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/). |
spellingShingle | Article Zhang, Zhengrui Matlan, Siti Jahara Wang, Hao Pishro, Ahad Amini Zhang, Lili Gao, Xian Liang, Zhao Liu, Xiaoyi Zhao, Peigen Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title | Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title_full | Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title_fullStr | Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title_full_unstemmed | Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title_short | Geotechnical Evaluation of Loess Modifications as the Sustainable Compacted Soil Liner Material in Solid Waste Landfill |
title_sort | geotechnical evaluation of loess modifications as the sustainable compacted soil liner material in solid waste landfill |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9323807/ https://www.ncbi.nlm.nih.gov/pubmed/35888449 http://dx.doi.org/10.3390/ma15144982 |
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