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Zeolite: From a Boiling Stone to the Applicable Minerals in...
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Zeolite: From a Boiling Stone to the Applicable Minerals in Various Industrial Processes: 2nd Edition

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

Deadline for manuscript submissions: 30 April 2025 | Viewed by 3058

Special Issue Editors

Prof. Dr. Nevenka Rajić

E-Mail Website
Guest Editor
Faculty of Ecology and Environmental Protection, The University Union—Nikola Tesla, 11158 Belgrade, Serbia
Interests: synthesis; characterization, and application of natural and synthetic porous materials
Special Issues, Collections and Topics in MDPI journals
Dr. Jelena Pavlović

E-Mail Website
Guest Editor
Institute of Soil Science, 11000 Belgrade, Serbia
Interests: zeolite-based adsorbents and catalysts; zeolites in sustainable chemistry
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Zeolites are well known aluminosilicate minerals with a distinct crystal structure and unique physical as well as chemical characteristics. They have a thermally stable three-dimensional crystal lattice that permits different chemical species to be accommodated within the cavities and channels of the aluminosilicate lattice and on its surface, including atoms, ions, and nanoparticles of different compounds. Before scientific research revealed that zeolites are, in many respects, unique minerals that can be relatively easily transformed into materials with a wide range of uses, zeolite was just an odd stone that released vapor when heated.

Zeolites are becoming increasingly popular as environmentally friendly substitutes for a wide range of chemicals and reagents, such as corrosive acids, polymeric adsorbents, catalysts, nanoparticle supports, and medications. Researchers studying zeolites as minerals or their applications in a range of domains (adsorption, agriculture, pharmacy, environmental protection, and catalysis) can publish their most recent findings in this Special Issue and, by promoting their research, also raise awareness of this unusual and beneficial mineral.

We are honored to invite you to collaborate on this project and share your most recent research findings with the scientific community in addition to the broader public.

Prof. Dr. Nevenka Rajić
Dr. Jelena Pavlović
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. 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

  • zeolite occurrence
  • adsorption
  • catalysis
  • surface functionalization
  • environmental protection
  • zeolite structures
  • zeolite engineering
  • sustainable applications of zeolites

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Related Special Issue

Published Papers (3 papers)

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Research

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14 pages, 3543 KiB  
Article
Research on the Adsorption Performance of Zeolites for Dimethyl Ether
by Xiaoqing Nie, Zhaoteng Xue, Wenqian Jiao, Jing Dong, Su Liu and Dongsen Mao
Minerals 2024, 14(11), 1141; https://doi.org/10.3390/min14111141 - 11 Nov 2024
Viewed by 418
Abstract
The purification and removal of polar impurities in olefin feedstocks is crucial for downstream deep processing, and adsorption is the main method for deep purification of such impurities. This article takes dimethyl ether, a typical oxygen-containing compound impurity in MTOs, as a polar [...] Read more.
The purification and removal of polar impurities in olefin feedstocks is crucial for downstream deep processing, and adsorption is the main method for deep purification of such impurities. This article takes dimethyl ether, a typical oxygen-containing compound impurity in MTOs, as a polar impurity molecule, and LTA and FAU topological zeolites as research objects. The influence of zeolite topology, morphology, skeleton silicon–aluminum (Si/Al) ratio, and ion type on the adsorption and removal of trace dimethyl ether was investigated by XRD, SEM, XRF, and nitrogen adsorption–desorption methods. The FAU topological zeolites show a better adsorption performance for dimethyl ether owing to their larger specific surface area and unobstructed pores compared with LTA zeolites. Among FAU topological zeolites, the NaX zeolite a with lower framework silica–alumina ratio has the highest adsorption capacity for dimethyl ether. Magnesium ion exchange on NaX zeolites (MgNaX) reduce the specific surface area and adsorption capacity of the NaX zeolite. However, after forming with alumina as a binder, the adsorption capacity of the MgNaX–Al2O3 adsorbent is about 13% higher than that of the NaX–Al2O3 adsorbent without Mg ion exchange. This may be due to the decomposition of residual organic Mg salts in the Mg ion exchange samples during high-temperature calcination, resulting in a larger specific surface area for the formed adsorbent. Further characterization of NH3–TPD and CO2–TPD shows that Mg ion exchange weakens the acid–base active sites on the adsorbent surface. The reduction in acid–base sites reduces the occurrence of side reactions such as polymerization and isomerization caused by the exothermic adsorption of olefins on adsorbents. Repeated adsorption data show that the formed adsorbent has excellent regeneration–adsorption performance. Full article
(This article belongs to the Special Issue Zeolite: From a Boiling Stone to the Applicable Minerals in Various Industrial Processes: 2nd Edition)
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14 pages, 2988 KiB  
Article
Adsorption of the Herbicide Endosulfan by Newly Discovered Zeolitic Tuffs in Mexico
by Juana Deisy Santamaria-Juarez, Miguel Ángel Hernández, Gabriela Itzel Hernández, Karin Monserrat Álvarez, Efraín Rubio, Roberto Portillo, María de los Ángeles Velasco, Josue Fernando Aquino and Vitalii Petranovskii
Minerals 2024, 14(7), 643; https://doi.org/10.3390/min14070643 - 24 Jun 2024
Viewed by 780
Abstract
The study presents experimental results on the adsorption of endosulfan in new natural zeolite deposits from Mexico. The adsorption of this herbicide was evaluated using inverse gas chromatography with a thermal conductivity detector and helium as the carrier gas. The experimental adsorption data [...] Read more.
The study presents experimental results on the adsorption of endosulfan in new natural zeolite deposits from Mexico. The adsorption of this herbicide was evaluated using inverse gas chromatography with a thermal conductivity detector and helium as the carrier gas. The experimental adsorption data were analyzed using the Langmuir and Freundlich equations in their linear form over a temperature range of 413–573 K. The study also estimated thermodynamic parameters such as the Free Energy of Gibbs (ΔG), isosteric enthalpy of adsorption (ΔH), and entropy change (ΔS) within this temperature range. The results indicated that the zeolites studied had a low adsorption capacity for this herbicide under the experimental conditions. The study also quantitatively determined the presence of starting minerals, with Na-Mordenite and Na-Clinoptilolite being the most prevalent, followed by Ca-Chabazite, Ca-Clinoptilolite, and Montmorillonite, with Quartz being present in low amounts. The NMOR zeolite underwent ion exchanges with AgNO3 to produce the Ag-MOR zeolite and assess its herbicide adsorption capacity. Another mineral, Ca-Stilbite, was present in higher quantities than Ca-Clinoptilolite and Quartz. Full article
(This article belongs to the Special Issue Zeolite: From a Boiling Stone to the Applicable Minerals in Various Industrial Processes: 2nd Edition)
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Review

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19 pages, 2658 KiB  
Review
Use of Natural Zeolite Clinoptilolite in the Preparation of Photocatalysts and Its Role in Photocatalytic Activity
by Jelena Pavlović and Nevenka Rajić
Minerals 2024, 14(5), 508; https://doi.org/10.3390/min14050508 - 13 May 2024
Viewed by 1191
Abstract
The use of natural zeolite clinoptilolite in preparing photocatalysts and its function in photocatalysis are discussed in this review. The importance of advanced oxidation processes (AOPs) and the potential of heterogeneous photocatalysis in removing environmental pollutants are emphasized. The review focuses on the [...] Read more.
The use of natural zeolite clinoptilolite in preparing photocatalysts and its function in photocatalysis are discussed in this review. The importance of advanced oxidation processes (AOPs) and the potential of heterogeneous photocatalysis in removing environmental pollutants are emphasized. The review focuses on the synergistic effects of clinoptilolite with semiconductors (TiO2, ZnO, CuO, SnO2, and NiO) to prepare stable and active photocatalysts, highlighting recent advancements in this field. It explores clinoptilolite’s structural characteristics, highlighting its microporous nature, adaptable framework, and improved textural properties due to acid and alkali treatments. Particle size, crystal phase, and calcination temperature are three key synthesis parameters that affect photocatalytic activity and are highlighted in the discussion of these parameters and their methods. A discussion is held regarding the processes and mechanisms of photocatalytic degradation of different organic compounds under varying irradiation conditions, including UV, visible, and ambient sunlight. Clinoptilolite is vital in improving supported semiconductor oxides’ photocatalytic efficiencies, which aid in pollutant degradation and environmental remediation. Full article
(This article belongs to the Special Issue Zeolite: From a Boiling Stone to the Applicable Minerals in Various Industrial Processes: 2nd Edition)
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