Ion Exchange Mastery: Targeting Cationic and Anionic Species for Their Efficient Separations from Various Samples

A special issue of Separations (ISSN 2297-8739). This special issue belongs to the section "Materials in Separation Science".

Deadline for manuscript submissions: closed (10 July 2024) | Viewed by 1043

Special Issue Editors


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Guest Editor
Department of Analytical Chemistry, Faculty of Chemistry, University of Bucharest, 4-12 Blvd Regina Elisabeta, 030018 Bucharest, Romania
Interests: separation sciences; ion exchange methods; non conventional ion exchangers; HPLC; HPLC-MS; GC-MS; spectrometry; NMR; IR; pharmaceutical analysis; electrochemistry

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Guest Editor
Department of Inorganic Chemistry, Faculty of Chemistry, University of Bucharest, 050663 Bucharest, Romania
Interests: coordination chemistry; biological active species (organic and inorganic); characterization methods (ESI-MS, NMR, IR, EPR)
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Special Issue Information

Dear Colleagues,

Ion exchange has been used empirically for centuries, long before the first separation reported by Tswet. Two important milestones in the late 19th and early 20th centuries influenced the development of both ion exchange research and its application: the theoretical foundation of ion exchange equilibrium and the discovery of synthetic resins, respectively. Since then, important applications have been developed and applied in areas such as water treatment and desalination, nuclear technology, pharmaceuticals, and the food, beverage, and chemical industries.

Advancements in the 21st century reflect a quest for discrimination among chemical species; therefore, selective ion exchangers have become a focus, with tailored resins such as chelating ones designed for specific ions. These were followed by smart ion exchangers, which are responsive to environmental stimuli, enabling the controlled release and capture of ionic species. Moreover, computational tools, molecular modeling, and docking techniques were employed for the design and optimization of ion exchange materials, accelerating the discovery of novel, high-performance systems such as mixed-mode stationary phases or ion exchange membranes with high selectivity and permeability. Furthermore, recent research has shown that some natural materials, such as wool, chitosan, walnut shells, etc., have ion exchange properties and, hence, a new era of eco-friendly stationary phases has flourished. Additionally, new applications are rising stars in the field of ion exchange, such as the integration of nanomaterials into ion exchange resins or carbon dots into membranes. Thus, the evolution of ion exchange continues to unfold, with ongoing efforts to address contemporary environmental challenges, improve resource recovery, and create innovative solutions for various industries.

This Special Issue will focus on the cutting edge of ion exchange equilibrium, materials, methods, and applications.

Dr. Irinel Adriana Badea
Dr. Rodica Olar
Guest Editors

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Keywords

  • ion exchange equilibrium
  • new synthetic resins
  • smart ion exchangers
  • chelating resins
  • mixed-mode stationary phases
  • ion exchange membranes
  • functionalized cyclodextrins
  • host-guest interactions
  • eco-friendly stationary phases
  • natural ion exchangers (i.e., wool, chitosan, walnut shells)
  • nanomaterials
  • carbon dots
  • contemporary environmental challenges
  • water treatment
  • desalination
  • nuclear technology
  • pharmaceutical field
  • innovative nanovectorized therapeutic systems
  • biomarkers
  • food, beverage, and chemical industries

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Published Papers (1 paper)

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Research

17 pages, 5601 KiB  
Article
A Comparison of Production Methods of High-Purity Perrhenic Acid from Secondary Resources
by Dorota Kopyto, Mateusz Ciszewski, Szymon Orda, Katarzyna Leszczyńska-Sejda, Joanna Malarz, Patrycja Kowalik, Karolina Pianowska, Karolina Goc, Grzegorz Benke, Alicja Grzybek, Dorota Babilas and Piotr Dydo
Separations 2024, 11(8), 225; https://doi.org/10.3390/separations11080225 - 24 Jul 2024
Viewed by 810
Abstract
Methods for obtaining high-purity perrhenic acid (with metallic impurities content below 100 ppm) of a high concentration > 200 g/dm3 and entirely from secondary raw materials were compared. Comparative analyses of three methods were performed: electrodialysis, solvent extraction (research carried out directly [...] Read more.
Methods for obtaining high-purity perrhenic acid (with metallic impurities content below 100 ppm) of a high concentration > 200 g/dm3 and entirely from secondary raw materials were compared. Comparative analyses of three methods were performed: electrodialysis, solvent extraction (research carried out directly as part of the Small Grant project acronym RenMet), and ion-exchange (developed as part of previous projects implemented by Łukasiewicz-IMN). The basic process parameters were selected as comparative indicators: efficiency and selectivity of the process, purity of the obtained product, availability and consumption of raw materials and reagents, equipment necessary to carry out the process, the profitability of the technology, and the ecological aspects, i.e., the possibility of managing the generated solid waste and post-production solutions. Analysis of the verified indicators allowed us to select the most economically and ecologically advantageous method of obtaining high-purity perrhenic acid from secondary raw materials. Its preparation using the ion-exchange method emphasizes the product’s purity and the process’s simplicity, using readily available waste materials and renewable ion-exchange resin, and is based on a sustainable circular economy. Full article
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