| Issue |
E3S Web Conf.
Volume 490, 2024
5th International Symposium on Architecture Research Frontiers and Ecological Environment (ARFEE 2023)
|
|
|---|---|---|
| Article Number | 03003 | |
| Number of page(s) | 6 | |
| Section | Ecological Environment Restoration and Pollution Control | |
| DOI | https://doi.org/10.1051/e3sconf/202449003003 | |
| Published online | 14 February 2024 | |
Migration Behavior and Breakthrough Time of Zinc Ions in Soil-Bentonite Liner
1 Engineering Cost Department, Zhejiang College of Construction, 310000 Xiaoshan Higher Education Park，Hang Zhou, Zhe Jiang, China
2 Civil Engineering Department, Infrastructure university Kuala Lumpur De Centrum City, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
* Corresponding author: 16943384@qq.com
Soil-bentonite is used as a liner material at the bottom of landfill sites, but temperature and ion concentration can affect the liner's impermeability causing a leakage of leachate into the soil. Therefore, this study aim to investigate the influence of initial ion concentration and temperature on adsorption capacity and removal rate of the Soil-bentonite liner using unit cell experiment. Meanwhile, the relationship between ion concentration, liner thickness, temperature, and breakthrough time was determine using Finite element analysis. The results show that the adsorption rate gradually decreases from 98.45% to 72.21% with an increase of initial concentration of Zinc from 3mmol/L to 100 mmol/L. It was also found that the temperature have a significant impact on the adsorption performance of soil-bentonite mixtures where the higher the temperature, the faster the removal rate. On the other hand, a combination of high pollutant concentrations and temperatures, along with thinner liner thickness, lead to quicker breakthrough of pollutants through the barrier, resulting in a shorter service life. The finding of this study is critical in the design and service life evaluation of the landfill liner system.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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