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Environmentally Friendly Adsorption Materials (2nd Edition)

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Green Materials".

Deadline for manuscript submissions: 20 May 2025 | Viewed by 3001

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Special Issue Information

Dear Colleagues,

The development of industry, constant urbanization, and an increasingly consumptive lifestyle, contribute to increasing the emission of gaseous and liquid pollutants and generating huge amounts of solid waste. The former poses a very serious threat to the atmosphere, surface and ground waters, and soil. Solid waste, on the other hand, is a problem because it requires landfilling, which is associated with the constant increase in the landfill area. For this reason, increasing attention is being paid to the development of all kinds of solutions to effectively reduce the amount of waste going to landfills. One of the ways to dispose of industrial and post-agricultural waste is currently their reuse. The materials obtained in this way can be successfully used in many branches of modern industry, as well as in environmental protection, among others, for the purification of waste gases and post-production wastewater, or for the remediation of contaminated soil. At the same time, energy-saving activities have been a key aspect recently. In this context, a new approach to environmental protection issues has been so-called "green chemistry", the principles of which are guidelines for reducing the consumption of raw materials and energy, reducing waste and generally reducing production costs. The idea is to eliminate processes that generate environmentally harmful organic substances, as well as to save reagents and energy. An excellent alternative to this type of solution is the production of waste materials from the biomass industry (pine cones), agriculture (wheat bran, straw) and in the household (coffee, tea grounds) to obtain valuable carbon adsorbents the perspective of their use in cleaning processes water from various types of pollutants, using adsorption and photocatalytic processes.

Prof. Dr. Ewa Skwarek
Dr. Agnieszka Gładysz-Płaska
Guest Editors

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Keywords

  • biosorbents
  • biochar
  • natural polymers
  • biodegradable sorbents
  • green sorbents
  • recycling

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Published Papers (2 papers)

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Research

20 pages, 3279 KiB  
Article
Efficient Ultrasound-Assisted Synthesis of Chemically Supported Anionic Functional Group Ionic Liquids and Its Enhanced Adsorption Performance Towards Vanadium (V)
by Bo Chen, Shenxu Bao, Yimin Zhang, Jiahao Zhou, Wei Ding, Liuyi Ren, Siyuan Yang and Ye Zhang
Materials 2025, 18(6), 1330; https://doi.org/10.3390/ma18061330 - 18 Mar 2025
Viewed by 241
Abstract
In this study, the chemically supported ionic liquids (CSILs) were synthesized by ultrasound irradiation (UI) to improve the preparation process and further strengthen the adsorption performance of CSILs towards vanadium (V). The impacts of UI and conventional mechanic stirring (CMS) on the synthesis [...] Read more.
In this study, the chemically supported ionic liquids (CSILs) were synthesized by ultrasound irradiation (UI) to improve the preparation process and further strengthen the adsorption performance of CSILs towards vanadium (V). The impacts of UI and conventional mechanic stirring (CMS) on the synthesis and adsorption characteristics of polystyrene [1-butyl-3-methylimidazolium][nitrate] (PS[C4mim][NO3]) were comparatively investigated. The experimental results demonstrate that ultrasound can dramatically shorten the preparation time from 1920 min to 15 min, and HNO3 dosage is reduced by 15.79%. Under the same adsorption conditions, the CSILs synthesized by UI achieve the maximal adsorption capacity towards vanadium (V) as 248.95 mg/g at 150 min, while the CSILs processed by CMS reach 223.90 mg/g at 105 min. Particularly, the adsorption capacity of CSILs synthesized by UI can be maintained as 96.42% of the initial value after 10 cycles of adsorption–desorption, while that of CSILs processed by CMS maintain as 94.87%. The adsorption isotherm and kinetics fitting demonstrate that vanadium (V) adsorption by two CSILs is dominated by chemisorption as a single molecular layer. Additionally, the adsorption reaction of vanadium (V) by these two CSILs are both endothermic, and entropy increases. Fourier transform infrared, scanning electron microscopy, and energy spectrometry analyses prove that PS[C4mim][NO3] is successfully prepared by UI and CMS methods, and ultrasound waves will not destroy the intact spherical structure of the support resins. The current work provides a novel insight for the efficient synthesis of CSILs, which is also a potential technique for improving the adsorption performance of the adsorbents towards valuable metals. Full article
(This article belongs to the Special Issue Environmentally Friendly Adsorption Materials (2nd Edition))
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12 pages, 2000 KiB  
Article
Adsorption Technology for PFAS Removal in Water: Comparison between Novel Carbonaceous Materials
by Marco Petrangeli Papini, Marta Senofonte, Riccardo Antonino Cuzzola, Rania Remmani, Ida Pettiti, Carmela Riccardi and Giulia Simonetti
Materials 2024, 17(17), 4169; https://doi.org/10.3390/ma17174169 - 23 Aug 2024
Cited by 2 | Viewed by 2461
Abstract
PFASs are a variety of ecologically persistent compounds of anthropogenic origin loosely included in many industrial products. In these, the carbon chain can be fully (perfluoroalkyl substances) or partially (polyfluoroalkyl substances) fluorinated. Their ubiquitous presence in many environmental compartments over the years and [...] Read more.
PFASs are a variety of ecologically persistent compounds of anthropogenic origin loosely included in many industrial products. In these, the carbon chain can be fully (perfluoroalkyl substances) or partially (polyfluoroalkyl substances) fluorinated. Their ubiquitous presence in many environmental compartments over the years and their long-lasting nature have given rise to concerns about the possible adverse effects of PFASs on ecosystems and human health. Among a number of remediation technologies, adsorption has been demonstrated to be a manageable and cost-effective method for the removal of PFASs in aqueous media. This study tested two novel and eco-friendly adsorbents (pinewood and date seeds biochar) on six different PFASs (PFOS, GenX, PFHxA, PFOA, PFDA, and PFTeDA). Batch sorption tests (24 h) were carried out to evaluate the removal efficiency of each PFAS substance in relation to the two biochars. All samples of liquid phase were analyzed by a developed and then a well-established method: (i) pre-treatment (centrifugation and filtration) and (ii) determination by high-performance liquid chromatography coupled with mass spectrometry (HPLC-MS/MS). The results evidenced a comparable adsorption capacity in both materials but greater in the long-chain PFASs. Such findings may lead to a promising path towards the use of waste-origin materials in the PFAS remediation field. Full article
(This article belongs to the Special Issue Environmentally Friendly Adsorption Materials (2nd Edition))
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