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Polymers
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Polymer for Dye Adsorption
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Polymer for Dye Adsorption

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Smart and Functional Polymers".

Deadline for manuscript submissions: closed (20 December 2022) | Viewed by 6122

Special Issue Editors

Dr. Julio Sánchez Poblete

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Guest Editor
Departamento de Ciencias del Ambiente, Facultad de Química y Biología, Universidad de Santiago de Chile (USACH), Santiago 9170022, Chile
Interests: adsorption; functional polymers; membranes
Special Issues, Collections and Topics in MDPI journals
Dr. Guadalupe del C. Pizarro

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Guest Editor
Departamento de Química, Universidad Tecnológica Metropolitana, Santiago 1242, Chile
Interests: hydrogels; polymer nanocomposites; photocatalysis
Dr. Diego P. Oyarzún

E-Mail Website
Guest Editor
Departamento de Química y Biología, Facultad de Ciencias Naturales, Universidad de Atacama, Copiapó 1242, Chile
Interests: photocatalysis; metal oxides; dyes; degradation; water treatment

Special Issue Information

Dear Colleagues,

The search for new technologies and materials for wastewater treatment has been increasing, and adsorption technology stands out because of its simple and low-cost process. This Special Issue is related to adsorbents based on synthetic polymers, polymeric nanocomposites, biopolymers, polymeric membranes, and conducting polymers, with different functionalities and characteristics capable of capturing the molecules of organic dyes in aqueous solution. Polymeric materials allow for the elaboration of a diverse range of efficient, reusable, economical, and environmentally friendly materials that may present competitive dye adsorption abilities. In addition, this Special Issue also includes topics such as the stabilization of metallic nanoparticles or metallic oxides in polymeric matrices and their ability to degrade organic dyes previously adsorbed in the material, which have attracted considerable scientific attention due to their simplicity, reusability, and high catalytic activity and because they do not generate byproducts that pollute the environment.

It is our pleasure to invite you to submit a manuscript to this Special Issue.

Dr. Julio Sánchez Poblete
Dr. Guadalupe del C. Pizarro
Dr. Diego P. Oyarzún
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. 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

  • adsorption
  • functional polymers
  • membranes
  • hydrogels
  • polymer nanocomposites
  • photocatalysis
  • metal oxides
  • dyes
  • degradation
  • water treatment

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Published Papers (2 papers)

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Research

20 pages, 5656 KiB  
Article
Adsorption Behavior of Methylene Blue Cationic Dye in Aqueous Solution Using Polypyrrole-Polyethylenimine Nano-Adsorbent
by Abdullahi Haruna Birniwa, Habibun Nabi Muhammad Ekramul Mahmud, Shehu Sa’ad Abdullahi, Shehu Habibu, Ahmad Hussaini Jagaba, Mohamad Nasir Mohamad Ibrahim, Akil Ahmad, Mohammed B. Alshammari, Tabassum Parveen and Khalid Umar
Polymers 2022, 14(16), 3362; https://doi.org/10.3390/polym14163362 - 17 Aug 2022
Cited by 66 | Viewed by 4335
Abstract
In this work, a polypyrrole-polyethyleneimine (PPy-PEI) nano-adsorbent was successfully synthesized for the removal of methylene blue (MB) from an aqueous solution. Synthetic dyes are among the most prevalent environmental contaminants. A new conducting polymer-based adsorbent called (PPy-PEI) was successfully produced using ammonium persulfate [...] Read more.
In this work, a polypyrrole-polyethyleneimine (PPy-PEI) nano-adsorbent was successfully synthesized for the removal of methylene blue (MB) from an aqueous solution. Synthetic dyes are among the most prevalent environmental contaminants. A new conducting polymer-based adsorbent called (PPy-PEI) was successfully produced using ammonium persulfate as an oxidant. The PEI hyper-branched polymer with terminal amino groups was added to the PPy adsorbent to provide more effective chelating sites for dyes. An efficient dye removal from an aqueous solution was demonstrated using a batch equilibrium technique that included a polyethyleneimine nano-adsorbent (PPy-PEI). The best adsorption parameters were measured at a 0.35 g dosage of adsorbent at a pH of 6.2 and a contact period of 40 min at room temperature. The produced PPy-PEI nano-adsorbent has an average particle size of 25–60 nm and a BET surface area of 17 m2/g. The results revealed that PPy-PEI nano-composite was synthesized, and adsorption was accomplished in the minimum amount of time. The maximum monolayer power, qmax, for MB was calculated using the isothermal adsorption data, which matched the Langmuir isotherm model, and the kinetic adsorption data, which more closely fitted the Langmuir pseudo-second-order kinetic model. The Langmuir model was used to calculate the maximum monolayer capacity, or qmax, for MB, which was found to be 183.3 mg g−1. The as-prepared PPy-PEI nano-adsorbent totally removes the cationic dyes from the aqueous solution. Full article
(This article belongs to the Special Issue Polymer for Dye Adsorption)
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23 pages, 7951 KiB  
Article
Chitosan- and Alginate-Based Hydrogels for the Adsorption of Anionic and Cationic Dyes from Water
by Mohammad T. ALSamman and Julio Sánchez
Polymers 2022, 14(8), 1498; https://doi.org/10.3390/polym14081498 - 7 Apr 2022
Cited by 49 | Viewed by 5317
Abstract
Novel hydrogel systems based on polyacrylamide/chitosan (PAAM/chitosan) or polyacrylic acid/alginate (PAA/alginate) were prepared, characterized, and applied to reduce the concentrations of dyes in water. These hydrogels were synthetized via a semi-interpenetrating polymer network (semi-IPN) and then characterized by Fourier transformed infrared spectroscopy (FTIR) [...] Read more.
Novel hydrogel systems based on polyacrylamide/chitosan (PAAM/chitosan) or polyacrylic acid/alginate (PAA/alginate) were prepared, characterized, and applied to reduce the concentrations of dyes in water. These hydrogels were synthetized via a semi-interpenetrating polymer network (semi-IPN) and then characterized by Fourier transformed infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA), and their swelling capacities in water were measured. In the adsorption experiments, methylene blue (MB) was used as a cationic dye, and methyl orange (MO) was used as an anionic dye. The study was carried out using a successive batch method for the dye absorption process and an equilibrium system to investigate the adsorption of MO on PAAM/chitosan hydrogels and MB on PAA/alginate in separate experiments. The results showed that the target hydrogels were synthetized with high yield (more than 90%). The chemical structure of the hydrogels was corroborated by FTIR, and their high thermal stability was verified by TGA. The absorption of the MO dye was higher at pH 3.0 using PAAM/chitosan, and it had the ability to remove 43% of MO within 10 min using 0.05 g of hydrogel. The presence of interfering salts resulted in a 20–60% decrease in the absorption of MO. On the other hand, the absorption of the MB dye was higher at pH 8.5 using PAA/alginate, and it had the ability to remove 96% of MB within 10 min using 0.05 g of hydrogel, and its removal capacity was stable for interfering salts. Full article
(This article belongs to the Special Issue Polymer for Dye Adsorption)
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