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Greening Industrial Solid Waste

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Green Materials".

Deadline for manuscript submissions: closed (20 November 2023) | Viewed by 983

Special Issue Editors


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Guest Editor
Department of Mechanical Engineering, Curtin University Malaysia, Miri, Malaysia
Interests: nano-enhanced green composite; recycling waste materials; advanced metal cutting; thermal management in electronic packaging

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Guest Editor Assistant
Department of Chemical and Energy Engineering, Curtin University Malaysia, Miri, Malaysia
Interests: coagulation and flocculation (bioflocculation); wastewater and sludge treatment; biomass utilization; sustainable development

Special Issue Information

Dear Colleagues,

Increasing urbanisation, population growth, and technological innovations have contributed to an increase in both the quantity and variety of solid wastes generated by industrial activities. Industrial waste can be broadly classified as solid waste, chemical waste, and hazardous waste. Solid waste in industry refers to waste paint, concrete, scrap metal, ash, slag, wastepaper, plastic, wood, cardboard, packaging materials, and all other material that can no longer serve their intended purpose. Hazardous and toxic wastes contain substances that can cause serious health and safety problems if they are not disposed of properly, such as heavy metals, pesticides, and radioactive, toxic, and infectious substances. However, if treated properly, industrial solid waste can be a valuable resource for the production of green materials, thereby reducing the environmental impact of industrial activities and promoting a circular economy.

In this Special Issue, we invite articles on industrial solid waste management and recycling for a green economy. The articles should present novel and effective strategies for reducing industrial solid waste production, recycling it, reprocessing it, disposing of it, and recovering waste energy from it.

We hope that this Special Issue will inspire further research and innovation in this area and contribute to global efforts toward a more sustainable future.

Dr. Sujan Debnath
Dr. Shiew Wei Lau
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. Materials 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 2600 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

  • reuse, reduction and recycling of solid waste
  • valorisation of solid waste
  • vermicomposting of solid waste
  • management and recycling of solid waste
  • disposal of solid waste
  • sustainable transition of solid waste to a green economy
  • toxic solid waste recycling
  • solid waste treatment for environmental sustainability
  • recovering industrial solid waste energy
  • challenges and opportunities associated with solid waste management.

Published Papers (1 paper)

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Research

17 pages, 3679 KiB  
Article
Control of Fluoride Pollution in Cemented Phosphogypsum Backfill by Citric Acid Pretreatment
by Yanan Zhou, Ying Shi and Quanqi Zhu
Materials 2023, 16(19), 6493; https://doi.org/10.3390/ma16196493 - 29 Sep 2023
Viewed by 809
Abstract
Using phosphogypsum (PG) as the aggregate of cemented backfill is an economical and effective method of PG utilization. However, the stability and performance of cemented backfill are challenged by the rich fluoride content in PG. In this study, the effects of citric acid [...] Read more.
Using phosphogypsum (PG) as the aggregate of cemented backfill is an economical and effective method of PG utilization. However, the stability and performance of cemented backfill are challenged by the rich fluoride content in PG. In this study, the effects of citric acid pretreatment on PG defluorination, backfill performance and environmental behavior were investigated by washing PG with different concentrations of citric acid and washing times. The results showed that the citric acid pretreatment could significantly reduce the fluoride content in PG and promote the hydration reaction with the binder, thus greatly reducing the usage and cost of the binder in actual production. Considering the efficiency of defluorination, the optimal citric acid concentration and washing times were determined to be 4% and 7–8 times, respectively. In addition, after citric acid pretreatment, the viscosity and setting time of the backfill slurry and the porosity of the backfill reduced, and the strength of the backfill improved, which was conducive to slurry pipeline transportation and underground mine stability. Finally, a further analysis of environmental behavior was conducted and it was found that the citric acid washing greatly reduced the content of fluoride in the bleeding water of slurry and the backfill leachate, which met the integrated wastewater discharge standard in China. The results of this study can provide important guidance for the large-scale recycling and environmental management of PG. Full article
(This article belongs to the Special Issue Greening Industrial Solid Waste)
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