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
Rights: © 2019 Elsevier Ltd. All rights reserved. This paper was published in Chemosphere and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20220407
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
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