Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study
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)...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/150362 |
| _version_ | 1824455999035015168 |
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| author | Yin, Ke Chan, Wei Ping Dou, Xiaomin Lisak, Grzegorz Chang, Victor Wei-Chung |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Yin, Ke Chan, Wei Ping Dou, Xiaomin Lisak, Grzegorz Chang, Victor Wei-Chung |
| author_sort | Yin, Ke |
| collection | NTU |
| description | 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. |
| first_indexed | 2025-02-19T03:47:07Z |
| format | Journal Article |
| id | ntu-10356/150362 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:47:07Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1503622021-05-22T20:11:39Z Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study Yin, Ke Chan, Wei Ping Dou, Xiaomin Lisak, Grzegorz Chang, Victor Wei-Chung School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Engineering::Civil engineering Incineration Bottom Ash Leachate Transportation 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. National Environmental Agency (NEA) Accepted version The authors would like to thank National Environment Agency, Singapore for their financial support in the study under Innovation Project Fund (IPF). 2021-05-21T07:07:31Z 2021-05-21T07:07:31Z 2019 Journal Article 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 0045-6535 0000-0002-4256-9954 https://hdl.handle.net/10356/150362 10.1016/j.chemosphere.2019.125254 31896190 2-s2.0-85074426638 242 125254 en IPF Chemosphere © 2019 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd. application/pdf |
| spellingShingle | Engineering::Civil engineering Incineration Bottom Ash Leachate Transportation Yin, Ke Chan, Wei Ping Dou, Xiaomin Lisak, Grzegorz Chang, Victor Wei-Chung Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title_full | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title_fullStr | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title_full_unstemmed | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title_short | Comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large-scale field trial study |
| title_sort | comparison and modeling of leachate transportation dominated by the field permeability with an anisotropic characteristic based on a large scale field trial study |
| topic | Engineering::Civil engineering Incineration Bottom Ash Leachate Transportation |
| url | https://hdl.handle.net/10356/150362 |
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