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Special Issue "Safe Disposal of Solid Waste in Landfill"

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A special issue of Sustainability (ISSN 2071-1050). This special issue belongs to the section "Waste and Recycling".

Deadline for manuscript submissions: 30 October 2023 | Viewed by 3398

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Special Issue Editors

Dr. Shifeng Lu

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Guest Editor

Department of Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China
Interests: loess mechanics and disaster prevention; safe disposal of solid waste; seasonal frozen soil and cold area engineering construction; contaminant migration in soils and site remediation
Special Issues, Collections and Topics in MDPI journals

Dr. Benyi Cao

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Guest Editor

School of Sustainability, Civil and Environmental Engineering, University of Surrey, Guildford GU2 7XH, UK
Interests: numerical simulation of liquid–gas migration in bioreactor landfills; constitutive model of a solid waste considering biodegradation; geophysical investigations of leachate distribution landfills

Dr. Zhengwei Chen

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Guest Editor

Department of Civil & Environmental Engineering, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
Interests: landfill stability; leachate and gas flow in landfills; MSW properties

Special Issue Information

Dear colleagues:

Landfill is still the primary means to deal with municipal solid waste (MSW) in many countries, and it will predominate as the primary treatment method for waste residues in the long run. However, landfills have the potential to exacerbate some environmental problems including instability failure, leachate leakage, and landfill gas emission. To avoid the occurrence of these environmental issues and to achieve the goal of safe and sustainable landfills, a large amount of effort by both engineers and researchers is still necessary.

The purpose of this Special Issue is to collect a wide range of studies regarding safe and sustainable landfills; both research articles and review articles as well as case studies are welcome for submission. The potential areas and topics include, but are not limited to, the following: (1) aerobic and anaerobic biodegradation of MSW in landfills; (2) basic properties of MSW and fly ash; (3) leachate and gas flow in landfills; (4) thermal properties of MSW and temperature in landfills; (5) coupled behaviors of MSW and landfill safety; (6) evaluation and assessments of landfill; (7) field measurement and tests in landfills; (8) environmental issues in and around landfills; (9) recycle and reuse of landfill resources; (10) policy and regulations about landfills.

Other topics related to MSW management and landfill safety are also welcome. This Special Issue is expected to provide innovative and sustainable techniques for waste disposal in landfills, and to enhance the understanding of safe disposal and sustainable landfills for human beings.

Dr. Shifeng Lu
Dr. Benyi Cao
Dr. Zhengwei Chen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sustainability is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

landfill
municipal solid waste
fly ash
leachate and landfill gas
sewage sludge
safe disposal
evaluation and assessments of landfill
recycle and reuse

Published Papers (3 papers)

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Research

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Open AccessCommunication

Non-Invasive Characterization of Subsurface Barriers Constructed via Deep Soil Mixing for Contaminated Land Containment

and

Sustainability 2023, 15(8), 6783; https://doi.org/10.3390/su15086783 - 17 Apr 2023

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Abstract

Deep soil mixing has been widely used to construct subsurface barriers (cut-off walls) in contaminated sites for contamination containment. Non-invasive geophysical methods are promising for the characterization and assessment of such barriers. The aim of this study was to assess and compare the characterization performance of four geophysical methods (i.e., electrical resistivity tomography, ground-penetrating radar, seismic imaging, and the transient Rayleigh surface wave method) for a subsurface barrier built using soil-mixing technology. The electrical resistivity tomography results show that the overall resistivity of the stratum on the barrier wall increased markedly, and local defects such as pockets of clay appeared as low-resistance anomalies on the resistivity profile. In contrast, the ground radar method failed to make a reasonable evaluation of the quality of the barrier wall because the surrounding environment caused great noise interference. The seismic mapping method had a better performance when the lateral geological conditions were studied. It is also suggested that to improve the signal-to-noise ratio of the surface wave signal, a vibrator with stronger energy should be used, and if conditions permit, the surrounding vibration sources should be shut down during geophysical tests. It is therefore recommended that decision makers and engineers consider using a combination of geophysical methods to evaluate the quality of barrier walls. They should also pay close attention to the specific geological conditions of a survey area, such as the presence of saltwater layers and interference from nearby structures, in order to choose the most appropriate method. Full article

(This article belongs to the Special Issue Safe Disposal of Solid Waste in Landfill)

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Open AccessArticle

Strength and Environmental Behaviours of Municipal Solid Waste Incineration Fly Ash for Cement-Stabilised Soil

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Sustainability 2023, 15(1), 364; https://doi.org/10.3390/su15010364 - 26 Dec 2022

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Abstract

Many sandy soil foundations need to be solidified during traffic construction in Guangxi, China. Because it has a similar chemical composition as cement, municipal solid waste incineration fly ash (MSWIFA) can strengthen sandy soil. However, the chloride ions and heavy metals in MSWIFA may have a negative influence on the solidification of sandy soil. Thus, FA resource use faces great challenges. This study evaluates the feasibility of using MSWIFA to solidify sandy soil. The acetic acid buffer solution method was used in the leaching test to simulate the weak acid groundwater environment in the Guangxi karst landform. The effects of the treatment methods (washing with ferrous sulphate solution, pre-treatment of organics via chelation, and adding sugarcane ash) on the strength and environmental characteristics of fly ash cement-stabilised soil (FACS) are discussed in detail. The results indicate that the FACS unconfined compressive strength (UCS) decreased by 24.82–46.64% when 5% cement was replaced with FA. Sugarcane ash effectively improved the strength of FACS by more than 10%. The leaching concentrations of Zn and Cu in the FACS meet the concentration limit set by GB 16889-2008. The leaching concentrations of Cr and Pb after washing with 6% ferrous sulphate solution were reduced by more than 30%. Meanwhile, the FACS strength developed faster. Organic chelating agents solidified most heavy metals. Full article

(This article belongs to the Special Issue Safe Disposal of Solid Waste in Landfill)

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Review

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Causes, Types and Consequences of Municipal Waste Landfill Fires—Literature Review

Dominika Dabrowska

Wojciech Rykala

and

Vahid Nourani

Sustainability 2023, 15(7), 5713; https://doi.org/10.3390/su15075713 - 24 Mar 2023

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Abstract

The amount of municipal waste produced worldwide has seen a significant increase in recent years. The need to store waste is a significant problem in the context of environmental threats and spatial development. Due to the fact that the easiest way to reduce the amount of waste is to incinerate it, and despite the fact that waste incineration plants have existed since the late 1800s, the amount of illegal waste burning and landfills has also increased. Subsurface landfill fires are particularly dangerous, as they can affect the structure of the landfill. Methane also plays an important role in fires as it is flammable and contributes to the spread of fire. In addition, the leachate from incinerated waste is much more dangerous than the leachate from waste in its natural state. The effluents from incinerated waste include heavy metals and persistent organic pollutants, as well as sulphates, chlorides, and polycyclic aromatic hydrocarbons. Other pollutants also end up in the atmosphere. The aim of this article is to present the problem of landfill fires and their impact on air, soil, and water, based on a review of the selected documented fires as well as indicators of fires in the areas in which the authors of this article conducted their research. The article presents an overview of methods and tests, such as dynamic leaching tests, monitoring tests, and lysimetric tests, all of which can be implemented to prevent fires as well as for research purposes after a fire has occurred, so that this article can be utilitarian not only for researchers, but also for decision makers. Full article

(This article belongs to the Special Issue Safe Disposal of Solid Waste in Landfill)

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