Identification and assessment of appropriate remediation management techniques for the recovery of soil-like material produced in landfill mining

Somani, Mohit, Harbottle, Michael ORCID: https://orcid.org/0000-0002-6443-5340, Datta, Manoj, Ramana, G.V. and Sreekrishnan, T. R. 2023. Identification and assessment of appropriate remediation management techniques for the recovery of soil-like material produced in landfill mining. Journal of Environmental Management 348 , 119300. 10.1016/j.jenvman.2023.119300

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Abstract

Landfill mining has received major attention in recent years for the reclamation of waste disposal sites, including in developing countries such as India where significant efforts are being made to manage sites in this way. The bulk of the material obtained from landfill mining consists of fine-grained soil-like material (SLM) but its direct reuse in off-site applications is restricted due to the presence of harmful heavy metals, soluble salts and other pollutants. In this study, appropriate techniques for managing SLM to permit recovery and reuse are assessed. As a result, experimental investigation explores the efficacy of two remediation techniques considered appropriate for SLM management: electrokinetic remediation and phytoremediation. These were applied to SLM from a recently mined landfill and their ability to reduce heavy metal and other soluble salt burdens assessed. Electrokinetic remediation has shown considerable potential to mobilise and transport heavy metals and soluble salts through and from the SLM over an eight-week period. Phytoremediation experiments also demonstrated mobilisation and uptake of metals from the SLM over a similar duration although relatively low amounts were recovered as a result of the low biomass produced over this period. Both technologies have demonstrated potential for recovery of metals from SLM, as well as recovering the SLM itself as a potential resource.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Engineering
Publisher:	Elsevier
ISSN:	0301-4797
Funders:	British Council
Date of First Compliant Deposit:	18 October 2023
Date of Acceptance:	7 October 2023
Last Modified:	27 Nov 2023 15:11
URI:	https://orca.cardiff.ac.uk/id/eprint/163278

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