Synthesis of sodium alginate (SA)/ polyvinyl alcohol (PVA)/ polyethylene oxide (PEO)/ ZSM-5 zeolite hybrid nanostructure adsorbent by casting method for uranium (VI) adsorption from aqueous solutions

Zahakifar, Fazel; Keshtkar, Asghar; Talebi, Marzieh

doi:10.1016/j.pnucene.2021.103642

Cited by 36 publications

(8 citation statements)

References 47 publications

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“…Nitrogen adsorption–desorption isotherm studies performed for hydrogel Cr(III)-IIM membrane indicated that the specific surface area is 5 m 2 /g with a total pore volume of 0.04 cm 3 /g. Similar results have already been reported for hydrogel membranes based on SA/PVA blend and different inorganic constituents [ 33 , 34 ].…”

Section: Resultssupporting

confidence: 90%

Cr(III) Ion-Imprinted Hydrogel Membrane for Chromium Speciation Analysis in Water Samples

Dakova

Vasileva

Karadjova

2022

Gels

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Novel Cr(III)-imprinted poly(vinyl alcohol)/sodium alginate/AuNPs hydrogel membranes (Cr(III)-IIMs) were obtained and characterized and further applied as a sorbent for chromium speciation in waters. Cr(III)-IIMs were prepared via solution blending method using blends of poly(vinyl alcohol) and sodium alginate as film-forming materials, poly(ethylene glycol) as a porogen agent, sodium alginate stabilized gold nanoparticles (SA-AuNPs) as a crosslinking and mechanically stabilizing component, and Cr(III) ions as a template species. The physicochemical characteristics of pre-synthesized AuNPs and obtained hydrogel membranes Cr(III)-IIM were studied by UV-vis and FTIR spectroscopy, TEM and SEM observations, N2 adsorption–desorption measurements, and XRD analysis. The mechanism of the adsorption process toward Cr(III) was best described by pseudo-first-order kinetic and Langmuir models. Experiments performed showed that quantitative retention of Cr(III) is attained in 20 h at pH 6 and temperature 40 °C. Under the same conditions, the adsorption of Cr(VI) is below 5%. A simple and sensitive analytical procedure was developed for the speciation of Cr in an aquatic environment using dispersive solid phase extraction of Cr(III) by Cr(III)-IIM prior to selective Cr(VI) measurement by ETAAS in the supernatants. The detection limits and reproducibility achieved for the Cr speciation analysis fulfill the requirements for their monitoring in waters under the demand of the Water Framework Directive.

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Section: Resultssupporting

confidence: 90%

Cr(III) Ion-Imprinted Hydrogel Membrane for Chromium Speciation Analysis in Water Samples

Dakova

Vasileva

Karadjova

2022

Gels

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“…101 For example, a quick search of commercial sites shows that a pack of 10 commercial alginate membranes, 108 Â 108 mm 2 , cost $29.00 USD, while a pack of traditional wound dressings such as Band-Aids with 10 units cost $1.10 USD. Some studies with SA and PVA systems for wound dressings have been reported and are used in nonmedical areas, such as for adsorption of materials like uranium IV ions, 18 for the production of materials for biodegradation of p-nitrophenol 102 and for the production of food packaging using SiO 2 . 66 These applications illustrate the versatility of the materials as a basis for the introduction of active components such as antibiotics, flavonoids, proteins, and polysaccharides.…”

Section: Challengesmentioning

confidence: 99%

“…Furthermore, these polymers can be combined with other components to improve physicochemical properties and biological effects 17 . These polymers can also encompass adsorbents, 18 foster the removal of heavy metals, 19 and be formed into nanocomposite hydrogels 20 and nanomaterials with wound healing properties 21 . SA, present in commercial wound dressings such as Algicell® (Dermascience) and Tegaderm® (3M Nextcare), due to its hydrophilic properties and biocompatibility, can also be used in biomaterials for skin, bone, and cartilage regeneration 22‐24 .…”

Section: Introductionmentioning

confidence: 99%

Alginate/polyvinyl alcohol films for wound healing: Advantages and challenges

et al. 2022

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The skin is the largest organ in the human body and its physical integrity must be maintained for body homeostasis and to prevent the entry of pathogenic microorganisms. Sodium alginate (SA) and polyvinyl alcohol (PVA) are two polymers widely used in films for wound dressing applications. Furthermore, blends between SA and PVA improve physical, mechanical and biological properties of the final wound healing material when compared to the individual polymers. Different drugs have been incorporated into SA/PVA-based films to improve wound healing activity. It is noteworthy that SA/PVA films can be crosslinked with Ca 2+ or other agents, which improves physicochemical and biological properties. Thus, SA/PVA associations are promising for the biomedical field, as a potential alternative for wound treatment. This review focuses on the main techniques for obtaining SA/PVA films, their physical-chemical characterization, drug incorporation, and the advantages and challenges of these films for wound healing.

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“…The Dubinin-Radushkevich isotherm is an empirical model applied to describe solid phase adsorption systems on heterogeneous surfaces. This isotherm model is a temperature-dependent model [22,23]. The Dubinin-Radushkevich isotherm (D-R) was checked for adsorption data (using Eq.…”

Section: Sorption Isothermsmentioning

confidence: 99%

“…The Dubinin-Radushkevich isotherm (D-R) was checked for adsorption data (using Eq. 7) to measure the adsorption energy [22,23]:…”

Section: Sorption Isothermsmentioning

confidence: 99%

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

Ibrahim

El‐Sheshtawy

El‐Magied

et al. 2021

J Radioanal Nucl Chem

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The Al 2 O 3 -SiO 2 -BFS (AS-BFS) solid adsorbent was developed from blast furnace slag (BFS). The potentiality of the AS-BFS for uranium ion removal from an aqueous medium, via the batch method, was explored and disused in terms of dynamic and isothermal properties. The sorbent exhibited good reusability, a high capacity for uranium ions, and a good specific surface area. The results showed that the sorbent evacuated uranium at about 88.5 mg/g. The sorbent represents a promising waste-derived substitute for other sorbents for water treatment.

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Synthesis of sodium alginate (SA)/ polyvinyl alcohol (PVA)/ polyethylene oxide (PEO)/ ZSM-5 zeolite hybrid nanostructure adsorbent by casting method for uranium (VI) adsorption from aqueous solutions

Cited by 36 publications

References 47 publications

Cr(III) Ion-Imprinted Hydrogel Membrane for Chromium Speciation Analysis in Water Samples

Cr(III) Ion-Imprinted Hydrogel Membrane for Chromium Speciation Analysis in Water Samples

Alginate/polyvinyl alcohol films for wound healing: Advantages and challenges

A facile and cost-effective adsorbent derived from industrial iron-making slag for uranium removal

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