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Polymers
Special Issues
Adsorption Behavior of Polymer Materials
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Adsorption Behavior of Polymer Materials

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

Deadline for manuscript submissions: closed (15 January 2023) | Viewed by 6318

Special Issue Editors

Dr. Giannin Mosoarca

E-Mail Website
Guest Editor
Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Bd. V.Parvan, No. 6, 300223 Timisoara, Romania
Interests: adsorption; biopolymers; optimization; modeling; environmental engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Cosmin Vancea

E-Mail Website
Co-Guest Editor
Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Bd. V.Parvan, No. 6, 300223 Timisoara, Romania
Interests: porous materials; glass–ceramic polymers; waste imobiliation; environmental engineering
Special Issues, Collections and Topics in MDPI journals
Dr. Marius Milea

E-Mail Website
Co-Guest Editor
Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University Timisoara, Bd. V.Parvan, No. 6, 300223 Timisoara, Romania
Interests: polymers; structural characterization; spectroscopic analysis; chromatographic analysis

Special Issue Information

Dear Colleagues,

In recent years, the adsorption process has been used increasingly more often to remove pollutants from liquid or gaseous industrial effluents. The adsorption process has many technical and economic advantages, such as high selectivity and efficiency, simplicity and flexibility in operation, good applicability, possibility to reuse the adsorbent, and a relatively low cost. The actual trend is identifying various new adsorbents with high adsorption capacities and making the process as economically efficient as possible. Polymer materials (natural or synthetic) can meet these criteria due to the functional groups in their chemical structure which enhance their absorption capability.

This Special Issue focuses on collecting high-quality research articles on the adsorption behavior of novel natural or synthetic polymer materials. 

Dr. Giannin Mosoarca
Dr. Cosmin Vancea
Dr. Marius Milea
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
  • polymers
  • synthesis
  • characterization
  • process mechanism
  • equilibrium
  • kinetics
  • thermodynamics

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Published Papers (3 papers)

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Research

17 pages, 2845 KiB  
Article
Crystal Violet Adsorption on Eco-Friendly Lignocellulosic Material Obtained from Motherwort (Leonurus cardiaca L.) Biomass
by Giannin Mosoarca, Cosmin Vancea, Simona Popa, Mircea Dan and Sorina Boran
Polymers 2022, 14(18), 3825; https://doi.org/10.3390/polym14183825 - 13 Sep 2022
Cited by 13 | Viewed by 1819
Abstract
The performance of a new eco-friendly adsorbent, obtained from motherwort (Leonurus cardiaca L.) biomass after minimum processing, in crystal violet dye removal from aqueous solutions was studied. Firstly, the adsorbent material was characterized using several technics, such as FTIR, pHPZC determination, [...] Read more.
The performance of a new eco-friendly adsorbent, obtained from motherwort (Leonurus cardiaca L.) biomass after minimum processing, in crystal violet dye removal from aqueous solutions was studied. Firstly, the adsorbent material was characterized using several technics, such as FTIR, pHPZC determination, SEM and color analysis. The next step was to determine the influence of initial dye concentration, contact time, temperature, pH, adsorbent dose and ionic strength on adsorbent adsorption capacity. Equilibrium, kinetic, thermodynamic, optimization and desorption studies were performed in a batch system for studying all aspects related to the adsorption process. The sips isotherm best fit the experimental data with a predicted maximum adsorption capacity of 125.6 (mg g−1). The kinetic data indicate that equilibrium is reached at 50 min and that general order is the best kinetic model to describe the dye retention. The process is endothermic, spontaneous, favorable and supposed to be a physical adsorption. In addition to establishing the optimal adsorption conditions, Taguchi methods and ANOVA analysis showed that the pH is the most influencing parameter of the adsorption process, having a contribution of 61.64%. All the presented data show that the motherwort biomass powder is very suitable to be used as at low-cost, easy available and effective adsorbent for the crystal violet dye removal from aqueous solutions. Full article
(This article belongs to the Special Issue Adsorption Behavior of Polymer Materials)
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19 pages, 4747 KiB  
Article
Highly Efficient Recovery of Ruthenium from Aqueous Solutions by Adsorption Using Dibenzo-30-Crown-10 Doped Chitosan
by Mihaela Ciopec, Oana Grad, Adina Negrea, Narcis Duţeanu, Petru Negrea, Raluca Vodă and Cătălin Ianăşi
Polymers 2022, 14(8), 1551; https://doi.org/10.3390/polym14081551 - 11 Apr 2022
Cited by 7 | Viewed by 1773
Abstract
Ruthenium, as an industrial by-product or from natural sources, represents an important economical resource due to its specific applications. A complex problem is represented by ruthenium separation during reprocessing operations, therefore, different materials and methods have been proposed. The present study aims to [...] Read more.
Ruthenium, as an industrial by-product or from natural sources, represents an important economical resource due to its specific applications. A complex problem is represented by ruthenium separation during reprocessing operations, therefore, different materials and methods have been proposed. The present study aims to develop a new material with good adsorbent properties able to be used for ruthenium recovery by adsorption from aqueous solutions. Absorbent material was obtained using chitosan (Ch) surface modification with dibenzo-30-crown-10 ether (DB30C10). Chitosan represents a well-known biopolymer with applicability in different adsorptive processes due to the presence of hydroxyl-, carboxyl-, and nitrogen-containing groups in the structure. Additionally, crown ethers are macromolecules with a good complexation capacity for metallic ions. It is expected that the adsorptive efficiency of newly prepared material will be superior to that of the individual components. New synthesized material was characterized using scanning electron microscopy coupled with energy dispersive X-ray (SEM–EDX), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller surface area analysis (BET), and determination of point of zero charge (pZc). Results obtained from the performed kinetic, thermodynamic, and equilibrium studies confirmed the good adsorptive capacity of the prepared material, Ch-DB30C10, obtaining a maximum adsorption capacity of 52 mg Ru(III) per gram. This adsorption capacity was obtained using a solution with an initial concentration of 275 mg L−1, at pH 2, and 298 K. Ru(III) adsorption kinetics were studied by modeling the obtained experimental data with pseudo-first order and pseudo-second order models. Desorption studies established that the optimum eluent was represented by the 5M HNO3 solution. Based on the performed studies, a mechanism for recovery of ruthenium by adsorption was proposed. Full article
(This article belongs to the Special Issue Adsorption Behavior of Polymer Materials)
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22 pages, 2862 KiB  
Article
The Use of Bilberry Leaves (Vaccinium myrtillus L.) as an Efficient Adsorbent for Cationic Dye Removal from Aqueous Solutions
by Giannin Mosoarca, Cosmin Vancea, Simona Popa, Mircea Dan and Sorina Boran
Polymers 2022, 14(5), 978; https://doi.org/10.3390/polym14050978 - 28 Feb 2022
Cited by 20 | Viewed by 2134
Abstract
In this study, a new lignocellulosic bioadsorbent, bilberry (Vaccinium myrtillus L.) leaves powder, was used to remove the methylene blue dye from aqueous solutions. The characterization of the adsorbent was performed by FTIR, SEM and color analysis. The influence of pH, contact [...] Read more.
In this study, a new lignocellulosic bioadsorbent, bilberry (Vaccinium myrtillus L.) leaves powder, was used to remove the methylene blue dye from aqueous solutions. The characterization of the adsorbent was performed by FTIR, SEM and color analysis. The influence of pH, contact time, adsorbent dose, initial dye concentration, temperature and ionic strength on the adsorption process were followed. Equilibrium, kinetic, and thermodynamic studies were conducted in order to understand the adsorption process mechanism. Process optimization was performed using the Taguchi method. Sips isotherm and general order kinetic model characterize the adsorption process. The maximum adsorption capacity, 200.4 (mg g−1), was better compared with other similar bioadsorbents. Thermodynamic parameters indicated that the adsorption process is spontaneous, favorable and endothermic and also that physisorption is involved in the process. The factor with the highest influence on the dye removal process was pH, followed by contact time, temperature, adsorbent dose, ionic strength and initial dye concentration. The obtained results revealed that the bioadsorbent material based on bilberry (Vaccinium myrtillus L.) leaves is highly efficient for cationic dyes removal from aqueous solutions. Full article
(This article belongs to the Special Issue Adsorption Behavior of Polymer Materials)
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