Effect of Single-Walled Carbon Nanotubes on the Adsorption of Basic Red 12 Dye by Trimellitic Anhydride Isothiocyanate-Crosslinked Chitosan Hydrogel

Al‐Harby, Nouf F.; Almarshed, Mawaheb S.; Mohamed, Nadia A.

doi:10.35812/cellulosechemtechnol.2023.57.40

Cited by 9 publications

(3 citation statements)

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“…Another study [ 71 ] with a constant adsorbent dose and without stirring was conducted with a chitosan hydrogel cross-linked with trimellitic anhydride isothiocyanate and filled with single-walled carbon nanotubes and with Basic red 12 dye showed that the maximum adsorption capacity was registered at pH 12, and the lowest one was obtained at pH 4, which was consistent with the predominant charge of the adsorbent.…”

Section: Resultsmentioning

confidence: 83%

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Grigoraș,

Simion,

Drob

2024

Gels

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Water is one of the fundamental resources for the existence of humans and the environment. Throughout time, due to urbanization, expanding population, increased agricultural production, and intense industrialization, significant pollution with persistent contaminants has been noted, placing the water quality in danger. As a consequence, different procedures and various technologies have been tested and used in order to ensure that water sources are safe for use. The adsorption process is often considered for wastewater treatment due to its straightforward design, low investment cost, availability, avoidance of additional chemicals, lack of undesirable byproducts, and demonstrated significant efficacious potential for treating and eliminating organic contaminants. To accomplish its application, the need to develop innovative materials has become an essential goal. In this context, an overview of recent advances in hydrogels based on chitosan and nanocomposites and their application for the depollution of wastewater contaminated with dyes is reported herein. The present review focuses on (i) the challenges raised by the synthesis process and characterization of the different hydrogels; (ii) the discussion of the impact of the main parameters affecting the adsorption process; (iii) the understanding of the adsorption isotherms, kinetics, and thermodynamic behavior; and (iv) the examination of the possibility of recycling and reusing the hydrogels.

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Section: Resultsmentioning

confidence: 83%

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Grigoraș,

Simion,

Drob

2024

Gels

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“…Previously, we modified chitosan via a reaction of its -NH 2 groups with TAI, achieving the inclusion of both the amide, thiourea, carboxylic groups in addition to the residual -NH 2 groups in it. This remarkably boosted the removal of both the anionic CR and the cationic Basic Red 12 (BR 12) dyes by the obtained chitosan hydrogels [22][23][24]. Based on these findings, we have progressed in the preparation of another series of PVA/chitosan blend-based hydrogels.…”

Section: Introductionmentioning

confidence: 85%

“…The pH values of these solutions were adjusted utilizing HCl/NaOH solutions (0.1 M). The pHzpc is determined as the pH value at ∆pH = 0 [24].…”

Section: Ph Of Zero-point Charge-phzpcmentioning

confidence: 99%

Poly (Vinyl Alcohol) Hydrogels Boosted with Cross-Linked Chitosan and Silver Nanoparticles for Efficient Adsorption of Congo Red and Crystal Violet Dyes

Alfuraydi,

Al-Harby,

Alminderej

et al. 2023

Gels

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In our previous work, three different weight ratios of chitosan/PVA (1:3, 1:1, and 3:1) were blended and then cross-linked with trimellitic anhydride isothiocyanate (TAI) at a concentration depending on their chitosan content, obtaining three hydrogels symbolized by H13, H11, and H31. Pure chitosan was cross-linked with TAI, producing a hydrogel symbolized by H10. Further, three H31-based silver nanoparticles composites (H31/AgNPs1%, H31/AgNPs3%, and H31/AgNPs5%) were also synthesized. They were investigated, for the first time in this study, as adsorbents for Congo Red (CR) and Crystal Violet (CV) dyes. The removal efficiency of CR dye increased with increasing H10 content in the hydrogels, and with increasing AgNP content in the composites, reaching 99.91% for H31/AgNPs5%. For CV dye, the removal efficiency increased with the increase in the PVA content. Furthermore, the removal efficiency of CV dye increased with an increasing AgNP content, reaching 94.7% for H31/AgNPs5%. The adsorption capacity increased with the increase in both the initial dye concentration and temperature, while with an increasing pH it increased in the case of CV dye and decreased in the case of CR dye. The adsorption of CV dye demonstrated that the Freundlich isotherm model is better suited for the experimental results. Moreover, the results were best fitted with pseudo-second-order kinetic model.

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Synthesis of Novel Antimicrobial and Food‐Preserving Hydrogel Nanocomposite Films Based on Carboxymethylcellulose

Elmehbad,

Mohamed,

El‐Ghany

2024

Starch Stärke

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The microbial resistance to the traditional antibiotics causes serious health problems and increases day by day. Thus, there is a pressing need to discover alternative antimicrobial agents of different nature than that of the conventional antibiotics. For this, novel hydrogel nanocomposite films are prepared by chemical crosslinking grafting of carboxymethyl cellulose with N,N′‐methylene‐bis‐acrylamide (CMC‐g‐MBA), which subsequently followed by loading two different weight ratios of titanium oxide nanoparticles (TiO2NPs), such as 3% (CMC‐g‐MBA/TiO2NPs‐3%) and 5% (CMC‐g‐MBA/TiO2NPs‐5%) wt%. Their chemical structure and surface morphology are confirmed using appropriate analytical techniques. Their antimicrobial activity can be arranged as follows: CMC‐g‐MBA/TiO2NPs‐5% composite > CMC‐g‐MBA/TiO2NPs‐3% composite > CMC‐g‐MBA hydrogel. While, the native CMC has no observable antimicrobial effect. CMC‐g‐MBA/TiO2NPs‐3% composite imparts good barrier properties to the coated tomato fruits, delaying their spoilage and protecting them from the environmental microbes compared to the uncoated ones. CMC‐g‐MBA/TiO2NPs‐5% composite is safe on the normal human cells. Thus, incorporation of both MBA and TiO2NPs into CMC greatly develops its antimicrobial activity and provides a wonderful approach to attain promising materials that can efficiently compete with conventional antibiotics.

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Effect of Single-Walled Carbon Nanotubes on the Adsorption of Basic Red 12 Dye by Trimellitic Anhydride Isothiocyanate-Crosslinked Chitosan Hydrogel

Cited by 9 publications

References 0 publications

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Hydrogels Based on Chitosan and Nanoparticles and Their Suitability for Dyes Adsorption from Aqueous Media: Assessment of the Last-Decade Progresses

Poly (Vinyl Alcohol) Hydrogels Boosted with Cross-Linked Chitosan and Silver Nanoparticles for Efficient Adsorption of Congo Red and Crystal Violet Dyes

Synthesis of Novel Antimicrobial and Food‐Preserving Hydrogel Nanocomposite Films Based on Carboxymethylcellulose

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