Performance Evaluation of Gum Gellan-Based Hydrogel as a Novel Adsorbent for the Removal of Cationic Dyes: Linear Regression Models

Choudhary, Sonal; Sharma, Kashma; Sharma, Vishal; Kumar, Vijay

doi:10.1021/acsami.2c20710

Cited by 12 publications

(5 citation statements)

References 54 publications

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“…At a concentration of 0.5 wt %, GG remains in a liquid state rather than forming a gel, resulting in a zero puncture force value. Upon addition of 1/2 MS medium, the mechanical impedance of the resulting gel significantly increases due to GG’s sensitivity to cations in the medium, particularly divalent cations like Ca 2+ and Mg 2+ . , These cations cross-linked with the carboxyl groups in GG molecular chains through electrostatic interaction, further consolidating the double-helix structure into a three-dimensional mesh gel. , Conversely, κ-C forms a gel with superior elasticity compared to agar and GG. While initially robust, the addition of a large quantity of salt ions (e.g., Ca 2+ and Na + ) in the 1/2 MS medium results in the κ-C gel transitioning from toughness to brittleness, causing it to be more fragile and requiring significantly less puncture force to penetrate.…”

Section: Resultsmentioning

confidence: 99%

“…48,49 These cations cross-linked with the carboxyl groups in GG molecular chains through electrostatic interaction, further consolidating the double-helix structure into a three-dimensional mesh gel. 50,51 Conversely, κ- C forms a gel with superior elasticity compared to agar and GG. While initially robust, the addition of a large quantity of salt ions (e.g., Ca 2+ and Na + ) in the 1/2 MS medium results in the κ-C gel transitioning from toughness to brittleness, 52 causing it to be more fragile and requiring significantly less puncture force to penetrate.…”

Section: Gel Mechanical Resistancementioning

confidence: 99%

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Engineering Rapeseed Germination and Root Growth with Mechanical Strength of Polysaccharide Hydrogel

Wu,

Xie,

et al. 2024

ACS Appl. Bio Mater.

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Plant roots are highly sensitive to physical stress in the soil, with appropriate mechanical impedance promoting root elongation and lateral root growth. However, few studies have quantitatively explored the relationship between the mechanical impedance of the growth medium and the phenotypes of plant roots. In this study, we used a tensile machine equipped with a self-made steel needle mimicking the root tip to measure the force needed to penetrate the hydrogel medium (agar, low acyl gellan gum, and κ-carrageenan), providing insights into the force required for the rapeseed root tip to enter the medium following germination. These findings indicate that root penetration length is inversely associated with the mechanical strength of the growth medium, with variations observed in the root system adaptability across different substrates. Specifically, when the gel puncture resistance of the culture medium without adding MS reached approximately 18.4 mN, root penetration and growth were significantly hindered. With the addition of 1/2 MS medium, the polysaccharide concentration is 1.0 wt %, which is more suitable for cultivating rapeseed. This research not only offers a method for quantifying root phenotypes and medium mechanical impedance but also presents an approach for plant growth regulation and crop breeding.

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Section: Resultsmentioning

confidence: 99%

Section: Gel Mechanical Resistancementioning

confidence: 99%

Engineering Rapeseed Germination and Root Growth with Mechanical Strength of Polysaccharide Hydrogel

Wu,

Xie,

et al. 2024

ACS Appl. Bio Mater.

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show abstract

Section: Resultsmentioning

confidence: 99%

“…After dye adsorption, the recovery and reusability of the hydrogels were the key factors for their potential application in cost-effective wastewater treatment. , Three cycles of adsorption/desorption of ARS by these hydrogels were conducted following a reported protocol . Typically, a dried hydrogel (20 mg) was agitated in 3 mL of an aqueous ARS dye solution (20 × 10 –5 M) for 48 h to reach equilibrium.…”

Section: Methodsmentioning

confidence: 99%

“…The dye removal efficiency of the adsorbent is expected to be influenced by the pH of the wastewater, and the change in adsorption capacities with the change in pH is guided by the nature of the organic dyes as well as their interaction with the adsorbent molecules. 27 Thus, to check, many comparative experiments were performed in the pH range of 4−10 at ambient temperature, while the other variables were kept constant. As shown in Figure S12, the q e values did not change significantly, except that a slight increase in the q e value was observed with increasing the pH during the adsorption of ARS and EB dyes onto CPAam 10 -ILA 1 and CPHEMA 10 -ILB 1 hydrogels, respectively.…”

Section: ■ Introductionmentioning

confidence: 99%

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Ionic Liquid Cross-Linked High-Absorbent Polymer Hydrogels: Kinetics of Swelling and Dye Adsorption

et al. 2023

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The use of polymer gels for the removal of toxic chemicals from wastewater is an important area in terms of both academic and industrial research. This work presents a simple approach to the fabrication of chemically cross-linked cationic hydrogel adsorbents using designed ionic liquid-based cross-linkers and their successful use in the removal of organic dyes. Two different ionic liquid cross-linkers, [VIm-4VBC][Cl] (ILA)/[DMAEMA-4VBC][Cl] (ILB), are synthesized by the simple nucleophilic substitution reaction of 4-vinylbenzyl chloride (4VBC) separately with 1-vinylimidazole (VIm) and 2-(dimethylamino)ethyl methacrylate (DMAEMA). Cross-linked poly(acrylamide) (CPAam) and poly(2-hydroxyethyl methacrylate) (CPHEMA) hydrogels are then prepared from the corresponding monomers and as-synthesized cross-linkers (ILA and ILB) by free radical polymerization in the presence of a redox initiator combining ammonium persulfate (APS) and N,N,N′,N′-tetramethylethylenediamine (TEMED). The dried CPAam and CPHEMA xerogels exhibit macroporous morphology and high thermal stability. The hydrogel samples exhibit high swelling behavior, and the diffusion of water molecules into the hydrogels follows pseudo-Fickian kinetics. The cationic cross-linking sites in the hydrogel networks allow preferable binding with anionic dyes, and these dye uptake capacities are determined using different model anionic dyes via UV–vis spectroscopy. The dye adsorption onto these hydrogels follows a pseudo-second-order kinetic model. The adsorption mechanism is also analyzed by employing intraparticle diffusion and Boyd kinetic models. The relationship between the maximum equilibrium adsorption capacity (q m) of the hydrogels for eosin B (EB) dye and the equilibrium EB concentration can be better described by Langmuir and Freundlich isotherm models, and the estimated q m using the Langmuir isotherm can reach more than 100 mg g–1. The cross-linked hydrogels can be easily regenerated and have a recycling efficiency of >80% for up to three consecutive dye adsorption–desorption cycles, which is promising for their use in wastewater treatment.

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Removal of basic fuchsin from aqueous solution using polyacrylamide and gellan gum-based hydrogels

Khan,

Rahman,

Alam

et al. 2024

Chem. Pap.

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Performance Evaluation of Gum Gellan-Based Hydrogel as a Novel Adsorbent for the Removal of Cationic Dyes: Linear Regression Models

Cited by 12 publications

References 54 publications

Engineering Rapeseed Germination and Root Growth with Mechanical Strength of Polysaccharide Hydrogel

Engineering Rapeseed Germination and Root Growth with Mechanical Strength of Polysaccharide Hydrogel

Ionic Liquid Cross-Linked High-Absorbent Polymer Hydrogels: Kinetics of Swelling and Dye Adsorption

Removal of basic fuchsin from aqueous solution using polyacrylamide and gellan gum-based hydrogels

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