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Advanced Hydrometallurgy and Recycling/Utilization of Metallic Resources
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Advanced Hydrometallurgy and Recycling/Utilization of Metallic Resources

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Manufacturing Processes and Systems".

Deadline for manuscript submissions: 20 June 2025 | Viewed by 3432

Special Issue Editors

Dr. Zhihui Yu

E-Mail Website
Guest Editor
1. National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing 100190, China
2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Interests: nickel laterite ore; acid leaching; enhanced oxidation by microbubbles; electrochemical synthesis
Special Issues, Collections and Topics in MDPI journals
Dr. Xiaoxian Zhao

E-Mail Website
Guest Editor
Department of Chemistry, College of Science, Hebei Agriculture University, Baoding 071001, China
Interests: inorganic energy storage material; sodium ion battery; lithium-ion battery; lithium-sulfur battery
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Jingkui Qu

E-Mail Website
Guest Editor
1. National Engineering Research Center of Green Recycling for Strategic Metal Resources, Beijing 100190, China
2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Interests: hydrometallurgy; chemical processes; energy materials; extraction and separation of metal resources; utilization of metallurgical solid waste
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Hydrometallurgical processes play an essential role in the recycling, recovery, and utilization of metallic resources, which include separating, enriching, leaching, and extracting metals from resources like ores, deposits, concentrates, and industrial and mining wastes.

This Special Issue aims to collect the latest contributions regarding emerging and sustainable hydrometallurgy/extractive metallurgy technologies, as well as applications in the extraction, recovery, and reuse of base, noble, and pure metals, rare earth elements, and energy metallic materials in primary and secondary resources.

Topics of interest for this Special Issue include, but are not limited to, the following:

  • Hydrometallurgical processes with applications in valuable or critical metal recovery, including copper, chromium, uranium, thorium, gold, silver, zinc, cobalt, nickel, lithium, rare earth, etc.
  • Solution concentration and purification, including precipitation, cementation; distillation, adsorption, solvent extraction, ion exchange, electrowinning, etc.
  • Environmentally/sustainable leaching, chemical processes, and economic assessment.

You may choose our Joint Special Issue in Minerals.

Dr. Zhihui Yu
Dr. Xiaoxian Zhao
Prof. Dr. Jingkui Qu
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

  • extractive metallurgy
  • hydrometallurgy
  • metal recovery and recycling
  • green chemistry
  • mechanism
  • selective separation
  • kinetics

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Published Papers (3 papers)

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Research

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20 pages, 29111 KiB  
Article
Evaluation of Silver Recovery from High-Sulphur Mining Waste Using Thiourea–Oxalate System
by Erick Jesús Muñoz Hernández, Norman Toro, Martín Reyes Pérez, Iván Alejandro Reyes Domínguez, Aislinn Michelle Teja Ruiz, Mizraim Uriel Flores Guerrero, Jesús Iván Martínez Soto, Gabriel Cisneros Flores and Julio Cesar Juárez Tapia
Materials 2025, 18(2), 347; https://doi.org/10.3390/ma18020347 - 14 Jan 2025
Viewed by 901
Abstract
Mine tailings are a byproduct of mineral extraction and often pose an environmental challenge due to the contamination of soil and water bodies with dissolved metals. However, this type of waste offers the opportunity for the recovery of valuable metals such as silver [...] Read more.
Mine tailings are a byproduct of mineral extraction and often pose an environmental challenge due to the contamination of soil and water bodies with dissolved metals. However, this type of waste offers the opportunity for the recovery of valuable metals such as silver (Ag). In the present investigation, an integral analysis of a sample of tailings was carried out, addressing granulometry, elemental composition, neutralization potential (NP), and acid potential (AP), as well as mineralogy, for the dissolution of silver from this type of waste. For this purpose, thiourea (CH4N2S) was used as a leaching agent due to its low toxicity, and potassium oxalate (K2C2O4) was used as an organic additive to improve the leaching of the silver phases (argentite and polybasite) present in the tailings. The effects of CH4N2S and K2C2O4 concentrations, temperature, and pH on the leaching efficiency of silver (Ag), copper (Cu), iron (Fe), and arsenic (As) were systematically studied. The results revealed that the maximum silver dissolution rate reached 90.75% under optimal conditions: 0.2 M L−1 of thiourea and 0.2 M L−1 of potassium oxalate, at 35 °C and a pH of 2. Full article
(This article belongs to the Special Issue Advanced Hydrometallurgy and Recycling/Utilization of Metallic Resources)
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Review

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36 pages, 3511 KiB  
Review
Innovative Approaches to Tin Recovery from Low-Grade Secondary Resources: A Focus on (Bio)hydrometallurgical and Solvometallurgical Methods
by Ewa Rudnik
Materials 2025, 18(4), 819; https://doi.org/10.3390/ma18040819 - 13 Feb 2025
Viewed by 895
Abstract
Tin, although not considered a critical material in all world regions, is a key material for modern technologies. The projected scarcity of tin in the coming decades emphasizes the need for efficient recycling methods to maintain uninterrupted supply chains. This review article focuses [...] Read more.
Tin, although not considered a critical material in all world regions, is a key material for modern technologies. The projected scarcity of tin in the coming decades emphasizes the need for efficient recycling methods to maintain uninterrupted supply chains. This review article focuses on the recovery of tin from low-grade secondary sources, specifically obsolete printed circuit boards (PCBs) and liquid crystal displays (LCDs). In both types of waste, tin occurs in various concentrations and in different chemical forms—a few percent as metal or alloy in PCBs and several hundred ppm as tin(IV) oxide in LCDs. This article presents pretreatment methods to preconcentrate tin and enhance subsequent leaching. It discusses not only conventional acid and alkaline leaching techniques but also the use of complexing agents and the challenges associated with bioleaching. Due to the dilution of the resulting leachates, advanced methods for tin ion separation and preconcentration before final product recovery are shown. Solvometallurgical methods employing deep eutectic solvents or ionic liquids, are also discussed; although promising, they still remain under development. Full article
(This article belongs to the Special Issue Advanced Hydrometallurgy and Recycling/Utilization of Metallic Resources)
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23 pages, 1149 KiB  
Review
Novel and Sustainable Materials for the Separation of Lithium, Rubidium, and Cesium Ions from Aqueous Solutions in Adsorption Processes—A Review
by Małgorzata A. Kaczorowska
Materials 2024, 17(24), 6158; https://doi.org/10.3390/ma17246158 - 17 Dec 2024
Cited by 1 | Viewed by 1149
Abstract
The growing demand for alkali metals (AMs), such as lithium, cesium, and rubidium, related to their wide application across various industries (e.g., electronics, medicine, aerospace, etc.) and the limited resources of their naturally occurring ores, has led to an increased interest in methods [...] Read more.
The growing demand for alkali metals (AMs), such as lithium, cesium, and rubidium, related to their wide application across various industries (e.g., electronics, medicine, aerospace, etc.) and the limited resources of their naturally occurring ores, has led to an increased interest in methods of their recovery from secondary sources (e.g., brines, wastewater, waste leachates). One of the dynamically developing research directions in the field of separation of AMs ions from various aqueous solutions is the search for novel, efficient, and “green” materials that could be used in adsorption processes, also on a larger industrial scale. This review concerns the latest achievements (mainly from 2023 to 2024) in the development of innovative adsorption materials (e.g., ion sieves, aluminum-based adsorbents, mineral adsorbents, composites, resins) for the separation of Li+, Cs+, and Rb+ ions from solutions, with particular emphasis on their most important advantages and limitations, as well as their potential impact on the environment. Full article
(This article belongs to the Special Issue Advanced Hydrometallurgy and Recycling/Utilization of Metallic Resources)
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