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Polymers
Special Issues
Functional Polymers for Water and Wastewater Treatment
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Functional Polymers for Water and Wastewater Treatment

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 980

Special Issue Editor

Dr. Diana Felicia Apopei Loghin

E-Mail Website
Guest Editor
Petru Poni Institute of Macromolecular Chemistry, Aleea Grigore Ghica Voda 41A, 700487 Iasi, Romania
Interests: grafted copolymers; hydrogels/cryogels; microspheres; polysaccharides; metal ions; dyes; adsorption; starch

Special Issue Information

Dear Colleagues,

Functional polymers contain chemically bonded functional groups on the backbone, which makes these polymers chemically active for various applications, for example, as reagents, catalysts, protecting groups, and more. Currently, functional polymers based on a wide range of natural and synthetic compounds are an important tool in the development of filtration membranes, fibres, nanoparticles, and nanotubes for water purification and the treatment of wastewater infected with a number of pollutants: heavy metals, pesticides, and dyes. Thus, many techniques have been shown to be effective for removing pollutants from wastewater, including adsorption, chemical precipitation, ion exchange, conventional coagulation, electrodialysis, electrolysis, and reverse osmosis. At the same time, various researchers/scientists in the field of environmental protection have been directed to develop several types of low-cost adsorbents used for the removal of pollutants from wastewater. This Special Issue is focused on the role of functional polymers for water and wastewater treatment. As the proposed topic is a very interesting one, we invite you and your research team to submit research or review articles to the Special Issue entitled “Functional Polymers for Water and Wastewater Treatment”, which will be published in Polymers.  

Dr. Diana Felicia Apopei Loghin
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. Polymers 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 2700 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

  • wastewater treatment
  • functional polymers
  • heavy metals
  • dyes
  • natural/synthetic polymers
  • pollutants
  • adsorbents

Published Papers (1 paper)

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Research

17 pages, 7036 KiB  
Article
Adsorption of Chromium (III) and Chromium (VI) Ions from Aqueous Solution Using Chitosan–Clay Composite Materials
by Enkhtuya Majigsuren, Ulziidelger Byambasuren, Munkhpurev Bat-Amgalan, Enkhtuul Mendsaikhan, Naoki Kano, Hee Joon Kim and Ganchimeg Yunden
Polymers 2024, 16(10), 1399; https://doi.org/10.3390/polym16101399 - 14 May 2024
Viewed by 678
Abstract
In this work, biopolymer chitosan and natural clay were used to obtain composite materials. The overall aim of this study was to improve the properties (porosity, thermal stability and density) of pure chitosan beads by the addition of clay and to obtain a [...] Read more.
In this work, biopolymer chitosan and natural clay were used to obtain composite materials. The overall aim of this study was to improve the properties (porosity, thermal stability and density) of pure chitosan beads by the addition of clay and to obtain a chitosan-based composite material for the adsorption of heavy metals from an aqueous solution, using Mongolian resources, and to study the adsorption mechanism. The natural clay was pre-treated with acid and heat to remove the impurities. The chitosan and pre-treated clay were mixed in different ratios (8:1, 8:2 and 8:3) for chemical processing to obtain a composite bead for the adsorption of chromium ions. The adsorption of Cr(III) and Cr(VI) was studied as a function of the solution pH, time, temperature, initial concentration of the chromium solution and mass of the composite bead. It was found that the composite bead obtained from the mixture of chitosan and treated clay with a mass ratio of 8:1 and 8:2 had the highest adsorption capacity (23.5 and 17.31 mg·g−1) for Cr(III) and Cr(VI), respectively, in the optimum conditions. The properties of the composite materials, prepared by mixing chitosan and clay with a ratio of 8:1 and 8:2, were investigated using XRD, SEM–EDS, BET and TG analysis. The adsorption mechanism was discussed based on the XPS analysis results. It was confirmed that the chromium ions were adsorbed in their original form, such as Cr(III) and Cr(VI), without undergoing oxidation or reduction reactions. Furthermore, Cr(III) and Cr(VI) were associated with the hydroxyl and amino groups of the composite beads during adsorption. The kinetic, thermodynamic and isothermal analysis of the adsorption process revealed that the interaction between the chitosan/clay composite bead and Cr(III) and Cr(VI) ions can be considered as a second-order endothermic reaction, as such the adsorption can be assessed using the Langmuir isotherm model. It was concluded that the composite bead could be used as an adsorbent for the removal of chromium ions. Full article
(This article belongs to the Special Issue Functional Polymers for Water and Wastewater Treatment)
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