Efficient adsorption of crystal violet (CV) dye onto benign chitosan-modified l-cysteine/bentonite (CS-Cys/Bent) bionanocomposite: Synthesis, characterization and experimental studies

Dyes and Pigments, Год журнала: 2023, Номер 216, С. 111305 - 111305

Опубликована: Апрель 15, 2023

Язык: Английский

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A Review of Pectin-Based Material for Applications in Water Treatment

Materials, Год журнала: 2023, Номер 16(6), С. 2207 - 2207

Опубликована: Март 9, 2023

Climate change and water are inseparably connected. Extreme weather events cause to become more scarce, polluted, erratic than ever. Therefore, we urgently need develop solutions reduce contamination. This review intends demonstrate that pectin-based materials an excellent route detect mitigate pollutants from water, with several benefits. Pectin is a biodegradable polymer, extractable vegetables, contains hydroxyl carboxyl groups can easily interact the contaminant ions. In addition, be prepared in different forms (films, hydrogels, or beads) cross-linked agents their molecular structure. Consequently, adsorbents tuned remove diverse pollutants. Here, will summarize existing remediation technologies highlighting adsorption as ideal method. Then, focus on chemical structure of pectin and, historical perspective, its after applying cross-linking methods. Finally, application adsorbent considering low degree methoxylation.

Язык: Английский

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Advanced electrospinning nanomaterials: From spinning fabrication techniques to electrochemical applications

Nano Research, Год журнала: 2024, Номер 17(8), С. 7077 - 7116

Опубликована: Июнь 18, 2024

Язык: Английский

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Research Progress of Water Treatment Technology Based on Nanofiber Membranes

Polymers, Год журнала: 2023, Номер 15(3), С. 741 - 741

Опубликована: Янв. 31, 2023

In the field of water purification, membrane separation technology plays a significant role. Electrospinning has emerged as primary method to produce nanofiber membranes due its straightforward, low cost, functional diversity, and process controllability. It is possible flexibly control structural characteristics electrospun well carry out various material combinations make full use their properties, including high porosity, selectivity, microporous permeability obtain high-performance treatment membranes. These can satisfy fast efficient purification requirements in different applications filtration efficiency. The current research on still focused creating high-permeability with outstanding remarkable antifouling performance, superior physical chemical long-term stability. This paper reviewed preparation methods properties for fields, microfiltration, ultrafiltration, nanofiltration, reverse osmosis, forward other special applications. Lastly, technologies progress were discussed, future development direction was also presented.

Язык: Английский

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Black Tea Extracts/Polyvinyl Alcohol Active Nanofibers Electrospun Mats with Sustained Release of Polyphenols for Food Packaging Applications

Polymers, Год журнала: 2023, Номер 15(5), С. 1311 - 1311

Опубликована: Март 6, 2023

The efficiency in the capabilities to store and release antioxidants depends on film morphology its manufacturing process, as well type methodology used obtain polyphenol extracts. Here, hydroalcoholic extracts of black tea polyphenols (BT) were obtained dropped onto different polyvinyl alcohol (PVA) aqueous solutions (water or BT extract with without citric acid, CA) three unusual PVA electrospun mats containing nanoparticles within their nanofibers. It was shown that mat through precipitated solution presented highest total content antioxidant activity, addition CA an esterifier crosslinker interfered polyphenols. kinetics food simulants (hydrophilic, lipophilic acidic) fitted using Fick’s diffusion law Peppas’ Weibull’s models, showing polymer chain relaxation is main mechanism all except for acidic, which abrupt by about 60% before being controlled. This research provides a strategy development promising controlled-release materials active packaging, mainly hydrophilic acidic products.

Язык: Английский

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Enhanced tetracycline removal through “in situ” europium incorporation in poly (vinyl alcohol) (PVA) electrospun mats: Advantages of this strategy in adsorption and reuse over doping

Chemosphere, Год журнала: 2025, Номер 372, С. 144102 - 144102

Опубликована: Янв. 21, 2025

Язык: Английский

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An in situ approach to entrap ultra-small iron oxide nanoparticles inside hydrophilic electrospun nanofibers with high arsenic adsorption

Chemical Engineering Journal, Год журнала: 2022, Номер 454, С. 140168 - 140168

Опубликована: Ноя. 3, 2022

The problem of arsenic contamination in water demands sustainable, scalable, and easy-to-implement solutions.Various nano-adsorbents flourished the last decade, but their use alone requires additional filtering processes to avoid environmental contamination.This work presents a simple, efficient, green approach overcome this inconvenience while maximizing adsorption capacity.We show for first time novel synthesizing ultra-small nanoparticles (IONPs) within electrospun hydrophilic poly(vinyl alcohol) (PVA) nanofibers, avoiding NPs release into environment when submerged water.The in-situ synthesis favor enhanced capacity due excellent dispersion, tiny size, surface availability IONPs, reaching 3.5 mg/g at 10 μg/L.We that IONPs alter polymeric matrix properties, such as glass transition temperature crystallinity, by preventing formation strong hydrogen bond inter/intramolecular interactions PVA.Insolubility swelling are essential characteristics membrane, which allow solution interchange onto IONPs.Isotherm studies increase from 1 wt% 3 content decreases active sites per mass IONPs.Still, it does not reusability reaches least cycles with 80 % efficiency.We discuss mechanisms phosphate anions partially inhibit As(V) membranes also highly capable removing Cr(VI), independently presence Ni(II).

Язык: Английский

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Polysaccharides as Economic and Sustainable Raw Materials for the Preparation of Adsorbents for Water Treatment

Polysaccharides, Год журнала: 2023, Номер 4(3), С. 219 - 255

Опубликована: Авг. 20, 2023

Adsorption processes, due to their technical simplicity and cost-effectiveness, have arisen as one of the most well-known, straightforward solutions water pollution. In this context, polysaccharides, abundance, biodegradability, biocompatibility, are appealing raw materials for design adsorbents. Moreover, some them, such chitosan, can be obtained from organic waste products, use additionally contributes solving another concerning problem: accumulation. Unfortunately, low adsorption capacities and/or physicochemical properties, native polysaccharides not suitable purpose. However, there alternatives that overcome these physical or chemical limitations, often taking advantage versatility polyhydroxylated structure. review aims present an overview advances 2019 onwards in new adsorbents treatment cellulose, alginate, starch, addressing two main strategies reported literature: preparation either polysaccharide-based composites polysaccharide derivatives. It is important point out that, herein, special emphasis placed on relationship between structure efficiency analyzed materials, attempt contribute rational polysaccharides.

Язык: Английский

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Cost-effective removal of Cr(VI) ions from aqueous media using L-cysteine functionalized gold nanoparticles embedded in melamine-based covalent organic framework (Cys-AuNPs@COF)

Spectrochimica Acta Part A Molecular and Biomolecular Spectroscopy, Год журнала: 2023, Номер 308, С. 123762 - 123762

Опубликована: Дек. 16, 2023

Язык: Английский

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Dual-functional porphyrinic zirconium-based metal–organic framework for the fluorescent sensing of histidine enantiomers and Hg²⁺

Analytical Methods, Год журнала: 2024, Номер 16(15), С. 2386 - 2399

Опубликована: Янв. 1, 2024

l -Cys/PCN-222 as a novel and dual-functional fluorescent sensor was developed. It not only showed higher chiral recognition of -histidine but also performed visual for Hg 2+ in actual surface water.

Язык: Английский

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