Recent Advances in the Recycling and Reuse of Metallurgical Wastes and By-Products

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Extractive Metallurgy".

Deadline for manuscript submissions: 25 July 2025 | Viewed by 920

Special Issue Editors


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Guest Editor
TeCIP Institute, Scuola Superiore Sant’Anna, 56124 Pisa, Italy
Interests: metallurgy; steel; modelling; simulation; sustainability; circular economy
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Special Issue Information

Dear Colleagues,

The implementation of the circular economy and industrial symbiosys practices and solutions is an absolute priority for all processing industries, including the metallurgical sector. Many public authorities, such as the European Union, are strongly promoting such concepts as a viable way to improve the socio-economic and environmental sustainability of companies. Consequently, research efforts have been intensified in this direction at both the public and private level, targeting new technologies and solutions improving the reuse and recycling of industrial wastes and by-products. The metallurgical sector is already familiar with circularity concepts, with the recycling and reuse of most metals, alloys, and by-products already honed to a consolidated practice for many significant companies, such as steelworks and aluminum producers. However, large volumes of by-products and wastes are produced by this sector, and new or improved solutions show large potential benefits and are thus under continuous investigation.

In this Special Issue, we welcome articles that focus on new technologies, processes, and solutions supporting or favoring the recycling, reuse, and valorization of metallurgical by-products and wastes. Contributions are expected to cover topics related to technologies and practices related to the recycling and reuse and/or at least one of the three main dimensions of sustainable development (i.e., environmental, economic, and social), taking into account the barriers and related solutions for the management and valorization of residues derived from metallurgical processes.

Dr. Valentina Colla
Dr. Ismael Matino
Guest Editors

Manuscript Submission Information

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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

  • by-products
  • residues
  • wastes
  • reuse
  • recycling
  • valorization
  • circular economy
  • industrial symbiosis
  • sustainability

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Published Papers (1 paper)

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Research

12 pages, 6943 KiB  
Article
Industrial Sludge Valorization in Soil Application
by Jarmila Trpčevská, Gréta Maruškinová, Martina Laubertová, Klaudia Kundráková and Dušan Oráč
Metals 2025, 15(1), 55; https://doi.org/10.3390/met15010055 - 10 Jan 2025
Viewed by 421
Abstract
Sludges produced in the pickling line in a steel company were applied to the soil as a secondary source of nutrients. In the experiments, the addition of two types of sludge, namely neutralization sludge (NS) and phosphatization sludge (PS), was evaluated. The listed [...] Read more.
Sludges produced in the pickling line in a steel company were applied to the soil as a secondary source of nutrients. In the experiments, the addition of two types of sludge, namely neutralization sludge (NS) and phosphatization sludge (PS), was evaluated. The listed sludges are defined as non-hazardous waste and contain elements such as iron, phosphorus, zinc, and others in minor quantities. The primary motivation for using these sludges in the soil is their phosphorus content, as phosphorus is a crucial mineral nutrient. Leaf lettuce was used as a test object. The quality of the soil in which it grew can be seen from the appearance of its leaves. The period of monitoring the growth of leaf lettuce was 35 days, while the length of the leaves was measured on different days (Days 7, 14, 21, 28, and 35). Different ratios of sludge to soil were chosen (1:2, 1:1, and 2:1) for the experiments. The comparative sample for evaluation of sludge addition was leaf lettuce that grew in soil without any presence of the sludge. The application of NS to the soil in all proportions significantly accelerated the growth of the lettuce, whereas the application of PS to the soil had a negative effect on the growth. Various analytical techniques, such as SEM, EDX, XRD, HR CS FAAS, and leachability tests, were used to analyze samples of the sludges. Full article
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