Special Issue "Future-Oriented and Sustainable Innovation in Hydrometallurgy: Moving towards the Crystal Structure, Molecular or Atomic Scale in the Minerals and Reagents"

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Processing and Metallurgy".

Deadline for manuscript submissions: 30 June 2020.

Special Issue Editor

Prof. Dr. Yousef Ghorbani
Website
Guest Editor
Department of Civil, Environmental and Natural resources engineering, Luleå University of Technology, 97187 Luleå, Sweden
Interests: hydro- and biohydro-metallurgy; electrochemistry; ores and leach chemistry; heap leaching; process mineralogy; waste valorization; electrowinning and electrorefining; adsorption and IX processes

Special Issue Information

Dear Colleagues,

Future-oriented and sustainable innovations in mineral extraction are required to allow economic extraction of metals from lower-grade and more complex ores. Hydrometallurgical technologies have shown the greatest potential for metal extraction from both primary and secondary raw material resources. The metal extraction steps are typically characterized by approaches that range from leaching of metal values by chemical reagents or bacterial action at ambient or elevated pressures and temperatures in reactors to leaching in vats or heaps (both chemical and biological) to in situ recovery. Although hydrometallurgical approaches have had many processes and technological developments at different front lines, there is still a lack of knowledge regarding the chemistry of hydrometallurgical processes, mineral and reagent interactions, and the involved electrochemistry. Whereas much has been observed at the macroscale regarding hydrometallurgical processes, it is clear that future-oriented and sustainable innovation in hydrometallurgy for more selective and environmentally friendly process development requires moving towards the crystal structure or molecular or atomic scale in minerals and reagents. These can only be convincingly tackled by the application of the state of the art tools and techniques through near-atomic-scale analytical and structural approaches, which may include, but are not limited to, quantum chemical modeling, PEEM/SPEM, nano-XRF, TEM, AFM, X-ray crystallography (XRC), and 3DEM.

For this Special Issue, we welcome both reviews and full-length articles. Of particular interest are articles that demonstrate how the crystal structure or molecular or atomic scale in minerals and reagents are a driving factor in developing future technological advances and sustainably innovative solutions in hydrometallurgy towards unlocking the use of potential raw materials from primary and secondary metal resources.

Prof. Dr. Yousef Ghorbani
Guest Editor

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 papers will be 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. Minerals is an international peer-reviewed open access monthly 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 1600 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

  • hydro- and biohydro-metallurgy
  • crystal structure
  • molecular or atomic scale
  • electrochemistry
  • ores and leach chemistry
  • reaction chemistry
  • gangue chemistry
  • mineral characterization
  • analytical approaches
  • foreign ions and ionic strength
  • reagent consumption by gangue minerals
  • heap leaching
  • atmospheric oxidation
  • pressure oxidation
  • oxidative leaching
  • removal of impurities
  • solution purification
  • solvent extraction and electrowinning (SX-EW)
  • adsorption and IX processes
  • eco-friendly processes
  • green reagents
  • strategic and critical metals
  • precious metals
  • critical elements
  • primary resources
  • secondary resources

Published Papers (1 paper)

Order results
Result details
Select all
Export citation of selected articles as:

Research

Open AccessArticle
Use of Seawater/Brine and Caliche’s Salts as Clean and Environmentally Friendly Sources of Chloride and Nitrate Ions for Chalcopyrite Concentrate Leaching
Minerals 2020, 10(5), 477; https://doi.org/10.3390/min10050477 (registering DOI) - 23 May 2020
Abstract
A less harmful approach for the environment regarding chalcopyrite concentrate leaching, using seawater/brine and caliche’s salts as a source of chloride and nitrate ions, was investigated. Different variables were evaluated: sulfuric acid concentration, sodium nitrate concentration, chloride concentration, source of water (distilled water, [...] Read more.
A less harmful approach for the environment regarding chalcopyrite concentrate leaching, using seawater/brine and caliche’s salts as a source of chloride and nitrate ions, was investigated. Different variables were evaluated: sulfuric acid concentration, sodium nitrate concentration, chloride concentration, source of water (distilled water, seawater, and brine), temperature, concentrate sample type, nitrate source (analytical grade and industrial salt), and pre-treatment methods in order to obtain maximum copper extraction. All tests were performed at moderate temperatures (≤45 °C) and atmospheric pressure. The leaching system using distilled water, seawater, and brine base media resulted in copper extraction of 70.9%, 90.6%, and 86.6% respectively. The leaching media, with a concentration of 20 g/L Cl, obtained a maximum Cu extraction of 93.5%. An increase in the concentration of H2SO4 and NaNO3 from 0.5 to 0.7 M, led to an increase in the copper extraction. The use of an industrial salt compared to the analytical salt did not show great variations in the percentage of extraction achieved, which would be a good and cost effective alternative. The increase in temperature from 25 to 45 °C showed a great effect on the copper leaching (of 60% until 90.6%, respectively). The pre-treatment is suggested to increase copper extraction from 60.0% to 71.4%. Full article
Show Figures

Figure 1

Back to TopTop