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Mineral Sorbents, Volume II
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Mineral Sorbents, Volume II

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

Deadline for manuscript submissions: closed (31 October 2021) | Viewed by 7047

Special Issue Editor

Prof. Dr. Dorota Kołodyńska

E-Mail Website
Guest Editor
Department of Inorganic Chemistry, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie Skłodowska University, 20-031 Lublin, Poland
Interests: ion exchangers; active carbons; biochars; mineral sorbents; zeolites; low-cost sorbents; hybrid materials; heavy metal ions; sorption; removal; separation; environmental protection
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Mineral sorbents are substances of wide application and of great importance for many industrial and environmental technologies. Natural varieties of minerals, mineral waste materials formed as a result of exploitation of, for example, carbonate rocks, or generated in combustion processes in fossil carbons are alternative materials for improving the natural environment.

Due to the unique physicochemical properties, their increasing importance in the processes of toxic compound removal; the reclamation of degraded areas; and the improvement of soil properties, i.e., the restoration of the biogeochemical balance of the environment, is observed year by year. Their unquestionable advantage is that they are cheap and available. Therefore, modified mineral sorbents as catalysts are used in the petrochemical industry. They are also widely applied in the food industry, agriculture, animal husbandry, as well as in medicine for the production of some drugs, etc.

Their use is mostly affected by mineralogical characteristics and unique physicochemical properties as well as simple modifications to enhance their effectiveness by among others grafting, change of surface charge, or structure adjustment. Therefore, all attempts to search for and modify this type of sorbents are of great importance. Their results form the basis for the identification of new physicochemical properties that determine, among others, sorption properties constituting an enormous application potential.

Therefore, this Special Issue aims at publishing papers discussing the recent achievements in the determination of mineral and chemical compositions, structure, and texture; and the adsorption properties of mineral sorbents and their modification to obtain materials for potential applications in environmental protection, especially for the removal of heavy metal ions, dyes, pesticides, etc.

Prof. Dr. Dorota Kołodyńska
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 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. 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 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

  • mineral sorbents
  • heavy metals
  • toxic substances
  • layered structure
  • adsorption
  • removal
  • environment

Related Special Issue

Published Papers (3 papers)

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Research

13 pages, 4134 KiB  
Article
Study on Adsorption Characteristics of Sulfonate Gemini Surfactant on Lignite Surface
by Xuanlai Chen, Guochao Yan, Xianglin Yang and Guang Xu
Minerals 2021, 11(12), 1401; https://doi.org/10.3390/min11121401 - 11 Dec 2021
Cited by 4 | Viewed by 2484
Abstract
In order to explore the adsorption characteristics of sulfonate gemini surfactants on the surface of lignite, the molecular dynamics simulation method was used, and A kind of sulfonic acid bis sodium salt (S2) and the sodium dodecyl sulfate (SDS) were selected. A binary [...] Read more.
In order to explore the adsorption characteristics of sulfonate gemini surfactants on the surface of lignite, the molecular dynamics simulation method was used, and A kind of sulfonic acid bis sodium salt (S2) and the sodium dodecyl sulfate (SDS) were selected. A binary model of surfactant/lignite adsorption system and a ternary model of water/surfactant/lignite system were constructed, and a series of properties such as adsorption configuration, interaction energy, order parameters, relative concentration distribution, number of hydrogen bonds, etc., were analyzed. The results showed that the adsorption strength of S2 on the surface of lignite was higher than that of SDS. The results indicated that the large-angle molecular chain in S2 tended to become smaller, the small-angle molecular chain tended to become larger, and the angle between the molecular chains and the Z axis tended to be concentrated, making the formed network structure denser during the adsorption process. The number of hydrogen bonds in the water-coal system was 42, and the number of hydrogen bonds in the system after S2 adsorption was 15, which was much lower than the 23 hydrogen bonds in the system after SDS adsorption, and S2 could better adsorb and wrap the oxygen-containing groups on the surface of the lignite. The comparative study of the adsorption characteristics of the two surfactants on the surface of lignite can help us better understand the influence of the surfactant structure on the adsorption strength. The research results have important theoretical and practical significance for developing new surfactants, and enriching and developing the basic theory of coal wettability. Full article
(This article belongs to the Special Issue Mineral Sorbents, Volume II)
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21 pages, 7896 KiB  
Article
The Use of Limestones Built of Carbonate Phases with Increased Mg Content in Processes of Flue Gas Desulfurization
by Katarzyna Jadwiga Stanienda-Pilecki
Minerals 2021, 11(10), 1044; https://doi.org/10.3390/min11101044 - 26 Sep 2021
Cited by 4 | Viewed by 1757
Abstract
The purpose of this article was to present the theory of the possibility of using limestone sorbents containing carbonate minerals with increased Mg content in processes of flue gas desulfurization in power stations. Data obtained as a result of the conducted research show [...] Read more.
The purpose of this article was to present the theory of the possibility of using limestone sorbents containing carbonate minerals with increased Mg content in processes of flue gas desulfurization in power stations. Data obtained as a result of the conducted research show that the analyzed Triassic (Muschelkalk) limestones of the south-west part of Poland are built of the following carbonate minerals: low magnesium calcite, high magnesium calcite, dolomite and huntite. These carbonate minerals are characterized by various magnesium contents. The increased content of magnesium in the sorbent has a positive effect on the technological process of flue gas desulfurization using the dry method, especially in the case of desulfurization with the application of Fluidized Bed Reactors. The positive influence of magnesium’s presence in sorbent in the desulfurization process is connected with the decarbonization of carbonate phases with magnesium at temperatures similar to the dolomite decarbonization temperatures, which are, thus, lower than typical for low magnesium calcite. The process would be easier because the structure of a solid solution containing magnesium ions, with a smaller ion radius to calcium ions, is unstable and the decomposition of these phases runs easier and faster. Therefore, the desulfurization process starts earlier and is more effective. Full article
(This article belongs to the Special Issue Mineral Sorbents, Volume II)
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19 pages, 2631 KiB  
Article
Optimization of Ni(II), Pb(II), and Zn(II) Ion Adsorption Conditions on Pliocene Clays from Post-Mining Waste
by Beata Jabłońska
Minerals 2021, 11(6), 568; https://doi.org/10.3390/min11060568 - 26 May 2021
Cited by 8 | Viewed by 2033
Abstract
Lignite mining results in a significant amount of waste clayey materials—the so-called Pliocene clays, which are often considered useless mineral waste. One method of management is to use them as inexpensive adsorbents in water and wastewater treatment, or as permeable barriers in groundwater [...] Read more.
Lignite mining results in a significant amount of waste clayey materials—the so-called Pliocene clays, which are often considered useless mineral waste. One method of management is to use them as inexpensive adsorbents in water and wastewater treatment, or as permeable barriers in groundwater remediation. The study is an attempt to use the raw Pliocene clays to remove Pb(II), Ni(II), and Zn(II) ions from wastewaters. The mineralogical composition, physicochemical, granulometric, structural, and surface properties were examined. The value of the point of zero charge pH of the adsorbent was found to be 7.1. To determine the optimal adsorption conditions, the central composite design (CCD) method was used with the pH of the solution, metal ion concentration, and the adsorbent mass as independent variables, and the percentage removal as the response variable. The determined optimal values of the adsorbent mass and the solution pH turned out to be similar for all three metals, with a pH of 6–7 and an adsorbent dose of 18–24 g/dm3. In further tests, the pH was established slightly lower than it would appear from the CCD method in order to avoid the possible precipitation of metals in the form of hydroxides. The kinetics of sorption were investigated and it was found that the sorption process ran for several minutes. The effect of temperature showed that the adsorption was spontaneous and thermodynamically favored. The leachability of the metals indicated that Pb(II) and Zn(II) were strongly bound in the adsorbent, whereas Ni(II) manifested a larger mobility. It was found that the tested clays had quite good sorption properties in relation to the tested metal ions and could be used for water and wastewater treatment. Full article
(This article belongs to the Special Issue Mineral Sorbents, Volume II)
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