Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/150362
Title: | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study | Authors: | Yin, Ke Chan, Wei Ping Dou, Xiaomin Lisak, Grzegorz Chang, Victor Wei-Chung |
Keywords: | Engineering::Civil engineering | Issue Date: | 2019 | Source: | Yin, K., Chan, W. P., Dou, X., Lisak, G. & Chang, V. W. (2019). Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study. Chemosphere, 242, 125254-. https://dx.doi.org/10.1016/j.chemosphere.2019.125254 | Project: | IPF | Journal: | Chemosphere | Abstract: | Permeability significantly affects leachate transportation. Yet, there often exists a gap for its measurements between laboratory and the field. To predict the fate and transport of heavy metals from IBA leaching, a large-scale field trial study was performed using a big column (d × h = 3 m × 5.5 m) packed with 1-m thickness of IBA (approx. 10.6 tons) overlaid by 4-m sand layer. The determined field permeability () was compared with that achieved from the laboratory, demonstrating a large disparity as much as 4 orders of magnitude likely due to IBA self-compaction. Indeed, back calculation using Blake-Kozeny’s equation unveiled that, the “effective” diameters were significantly reduced by 21–46%. also demonstrated an anisotropic characteristic associated with fingered flows, trapped bubbles and heterogeneous consolidation/cementation efficiencies. To quantify the effects by , we ran a mechanistic model to simulate the transport of 11 heavy metals under advection ( = 0.05 m/m), indicating dramatically prolonged breakthrough time from days to centuries. Interestingly, breakthrough time was comparable among various metal ions (0–16.6% of RSD), suggesting their synchronous movements. Metal flux under was predicted in the end to address its toxicity potential, demonstrating limited environmental impacts in presence of the USEPA criterion. | URI: | https://hdl.handle.net/10356/150362 | ISSN: | 0045-6535 | DOI: | 10.1016/j.chemosphere.2019.125254 | Schools: | School of Civil and Environmental Engineering | Research Centres: | Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre |
Rights: | © 2019 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd. | Fulltext Permission: | open | Fulltext Availability: | With Fulltext |
Appears in Collections: | CEE Journal Articles NEWRI Journal Articles |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study.pdf | 704.5 kB | Adobe PDF | View/Open |
SCOPUSTM
Citations
50
6
Updated on Mar 21, 2024
Web of ScienceTM
Citations
50
5
Updated on Oct 27, 2023
Page view(s)
214
Updated on Mar 27, 2024
Download(s) 50
42
Updated on Mar 27, 2024
Google ScholarTM
Check
Altmetric
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.