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Materials in the Application of Adsorption, Degradation, Catalysis and Water Treatment

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: 31 December 2024 | Viewed by 2118

Special Issue Editors


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Guest Editor
Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timişoara, Piaţa Victoriei, No.2, 300006 Timişoara, Romania
Interests: adsorption; metal recovery; SEM; FT-IR
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Guest Editor Assistant
Research Institute for Renewable Energies—ICER, Politehnica University Timisoara, Gavril Musicescu no. 138, 300501 Timisoara, Romania
Interests: civil engineering; water treatment; waste water expertise; antimicrobial activity; material characteristics; biomaterials; scanning electron microscopy

Special Issue Information

Dear Colleagues,

Natural materials derived from polymers are considered the materials of the future, becoming a part of everyday life as a result of their applications in fields such as cosmetics, pharmacy, the food industry, medicine, chemical industry, electronics, and electrotechnics. Their beneficial effect on the protection of the environment, but especially their antimicrobial role, has received the attention of various scientists.

At the same time, it is absolutely necessary to understand their physicochemical properties, such as their shape, size, crystalline structure, solubility, or surface chemistry, in order to establish the role of each property in the manifestation of the antimicrobial effect of the biomaterial.

The research and development of natural polymers have gained significant relevance, conducted by "green chemistry" and sustainability principles that are increasingly being adapted in industry. The characteristics of natural polymers, such as their biocompatibility, precisely designed degradability rate, thermal ability, relatively high strength, low toxicity, controlled crystallinity, adsorption capacity, and hydrophilicity, have made natural polymers extremely useful, especially in biomedical applications, as dietary supplement precursors, antioxidants, or probiotics.

However, increasing amounts of compounds based on biopolymers are used in the food or cosmetic industry, in the production of packaging, in food preservation, or as emulsifying agents. Last but not least, materials based on biopolymers are used as flocculation agents in water purification processes or for the manufacture of reverse osmosis membranes.

Dr. Adina Negrea
Guest Editor

Dr. Nicoleta Sorina Nemeş
Guest Editor Assistant

Manuscript Submission Information

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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

  • biomaterial
  • antimicrobial
  • adsorbent
  • catalyst
  • natural polymers/biopolymers
  • food packaging
  • conventional technologies for water treatment
  • advanced technologies for water treatment

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Published Papers (2 papers)

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Research

11 pages, 3054 KiB  
Article
Enhanced TiO2-Based Photocatalytic Volatile Organic Compound Decomposition Combined with Ultrasonic Atomization in the Co-Presence of Carbon Black and Heavy Metal Nanoparticles
by Zen Maeno, Mika Nishitani, Takehiro Saito, Kazuhiko Sekiguchi, Naoki Kagi and Norikazu Namiki
Molecules 2024, 29(16), 3819; https://doi.org/10.3390/molecules29163819 - 12 Aug 2024
Viewed by 618
Abstract
Volatile organic compounds (VOCs) are representative indoor air pollutants that negatively affect the human body owing to their toxicity. One of the most promising methods for VOC removal is photocatalytic degradation using TiO2. In this study, the addition of carbon black [...] Read more.
Volatile organic compounds (VOCs) are representative indoor air pollutants that negatively affect the human body owing to their toxicity. One of the most promising methods for VOC removal is photocatalytic degradation using TiO2. In this study, the addition of carbon black (CB) and heavy metal nanoparticles (NPs) was investigated to improve the efficiency of a TiO2-based photocatalytic VOC decomposition system combined with ultrasonic atomization and ultraviolet irradiation, as described previously. The addition of CB and Ag NPs significantly improved the degradation efficiency. A comparison with other heavy metal nanoparticles and their respective roles are discussed. Full article
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20 pages, 2202 KiB  
Article
Adsorption of Scandium Ions by Amberlite XAD7HP Polymeric Adsorbent Loaded with Tri-n-Octylphosphine Oxide
by Diana Daminescu, Narcis Duteanu, Mihaela Ciopec, Adina Negrea, Petru Negrea, Nicoleta Sorina Nemeş, Bogdan Pascu, Cătălin Ianăşi and Lucian Cotet
Molecules 2024, 29(7), 1578; https://doi.org/10.3390/molecules29071578 - 1 Apr 2024
Cited by 1 | Viewed by 970
Abstract
In an actual economic context, the demand for scandium has grown due to its applications in top technologies. However, further development of new technologies will lead to an increase in the market for Sc related to such technologies. The present study aims to [...] Read more.
In an actual economic context, the demand for scandium has grown due to its applications in top technologies. However, further development of new technologies will lead to an increase in the market for Sc related to such technologies. The present study aims to improve and upgrade existing technology in terms of efficient scandium recovery, proposing a new material with selective adsorptive properties for scandium recovery. To highlight the impregnation of Amberlite XAD7HP resin with tri-n-octylphosphine oxide extractant by the solvent-impregnated resin method, the obtained adsorbent material was characterized by physico-chemical techniques. Further, the specific surface of the adsorbent and the zero-point charge of the adsorbent surface have been determined. Different parameters, such as initial concentration, adsorbent amount, contact time, or temperature, have been studied. The initial pH effect was investigated when a maximum adsorption capacity of 31.84 mg g−1 was obtained at pH > 3, using 0.1 g of adsorbent and a contact time of 90 min and 298 K. An attempt was made to discuss and provide a clear representation of the studied adsorption process, proposing a specific mechanism for Sc(III) recovery from aqueous solutions through kinetic, thermodynamic, and equilibrium studies. Adsorption/desorption studies reveal that the prepared adsorbent material can be reused five times. Full article
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