Regadío, M. orcid.org/0000-0002-0406-6416, Cargill, A., Black, J.A. orcid.org/0000-0002-3529-6708 et al. (1 more author) (Submitted: 2020) High Attenuation Recycled Materials as landfill liners (the HARM project) – a new concept for improved landfill liner design. EarthArXiv. (Submitted)
Abstract
A new approach in landfill liner design which combines hydraulic containment of leachate with contaminant attenuation to improve the performance of these environmental control systems at landfills is described. The idea is to re-use readily available industrial waste residues (construction and biomass waste) as additives for natural clay liners, wherein the additives have specific properties which enhance the attenuation of contaminants by the mixture. The aim is to (1) evaluate the contaminant attenuation capacity of these mixtures, (2) develop design guidelines to construct liners for waste containment systems and similar applications, and (3) interpret their performance using numerical modelling. This is evaluated in permeation studies using a geotechnical centrifuge, which enables the performance of liner compositions to be tested for representive time-scales (100 years), pressures and temperatures at realistic experimental time-scales of days-weeks in the laboratory. The permeation experiments include liner compositions flushed with leachate to deduce contaminant transport and attenuation mechanisms, followed by rainwater to assess the potential for release of attenuated contaminants. This experimental methodology is illustrated with depth profiles from permeation studies conducted on different clay-additive compositions. The concept will be applicable for liner design at other waste disposal facilities and is a timely improvement which addresses the problem of managing large quantities of industrial residues. Instead of disposal these can be recycled as an additive in host clay to construct these liners, thus conserving natural resources (clay) and reducing construction costs. It also provides an effective and more environmentally sustainable basis to reduce risks from leachate leakage.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Authors. Pre-print available under the CC BY Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/legalcode). |
Keywords: | diffusion; HARM project; landfill; leachate attenuation; recycled liners |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Civil and Structural Engineering (Sheffield) |
Funding Information: | Funder Grant number Engineering and Physical Science Research Council EP/J013714/1; EP/K040316/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 05 Mar 2021 12:13 |
Last Modified: | 05 Mar 2021 12:13 |
Status: | Submitted |
Publisher: | California Digital Library (CDL) |
Identification Number: | 10.31223/osf.io/b49hd |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:171847 |
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Filename: High Attenuation RecycledMaterials as landfill liners(the HARM project).pdf
Licence: CC-BY 4.0