Preparation of sulfonated chitosan for enhanced adsorption of methylene blue from aqueous solution

Sabar, S.; Aziz, Hamidi Abdul; Yusof, Nurul Huda Mohd; Subramaniam, Sangeetha; Foo, K.Y.; Wilson, Lee D.; Lee, H.K.

doi:10.1016/j.reactfunctpolym.2020.104584

Cited by 83 publications

(39 citation statements)

References 43 publications

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“…However, many researchers emphasized that the adsorption of MB affects the surface acidity of carbon by various surface functional groups such as phenol and carboxyl groups due to the influence of electrostatic interactions with the adsorbent. It was confirmed by several researchers that such surface acidity affects the adsorption efficiency of MB [6,12,[20][21][22].…”

Section: Physical Propertymentioning

confidence: 81%

“…MB is a cationic molecule containing 6 carbon aromatic rings, nitrogen and sulfur in its molecular structure that affects the interaction of the adsorbent with the carbon surface [22]. The process of adsorption of MB to carbon occurs through electrostatic interactions, formation of hydrogen bridges, electron donor acceptor relationships, and the electron dispersing force of π-π between functional groups on the carbon surface with MB molecules [5].…”

Section: Ft-ir Spectramentioning

confidence: 99%

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Assessment of sulfonation in lignocellulosic derived material for adsorption of methylene blue

Choi

2021

Environmental Engineering Research

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The lignocellulosic derived cornstalk was sulfonated (SCS) to prepare an adsorbent, and cationic dye methylene blue (MB) was adsorbed using SCS to evaluate its usability. Sulfonation improved the number of carboxyl groups (-COOH) and increased the porosity and surface area of carbon. In the adsorption process in which MB is adsorbed using SCS in aqueous solution, the sulfone group expanded the form of the sulfonated adsorbent to increase the exposure of anions (sulfonic-acid (R-SO 3 H), carboxylic groups, and bonded OH-group) to the surface. As a result, the adsorption efficiency of MB, a cationic dye for SCS, was improved. The results of kinetics, adsorption isotherm and thermodynamics were suitable for Pseudo-2nd-order and Langmuir, and the adsorption process was endothermic and spontaneous physical adsorption. The maximal adsorptions capacity with Langmuir model was found to be 504.3 mg/g at 293K. Sulfonation improved not only electrostatic interaction but also π-π stacking in the adsorption process, which was very advantageous in adsorbing cationic dyes using lignocellulose-based adsorbents.

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Section: Physical Propertymentioning

confidence: 81%

Section: Ft-ir Spectramentioning

confidence: 99%

Assessment of sulfonation in lignocellulosic derived material for adsorption of methylene blue

Choi

2021

Environmental Engineering Research

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“…Sulfonated chitosan is water-soluble anionic chitosan, which was derived with N-benzyl disulfonated derivative [31]. This modification of chitosan has been shown to be effective, not only as antiviral and antibacterial but also as anticoagulant properties.…”

Section: Sulfonated Chitosanmentioning

confidence: 99%

“…Sulfonated chitosan has been developed to carry anticoagulant drugs such as reviparin and enhance the anticoagulant activity. Sulfonated chitosan nanoparticles interact with factor Xa and inhibit their function in the blood clotting mechanism [31,33]. Low molecular weight sulfoethyl chitosan acts as capping of nanoparticles [33].…”

Section: Sulfonated Chitosanmentioning

confidence: 99%

Chitosan-Based Oral Drug Delivery System for Peptide, Protein and Vaccine Delivery

Zainuddin¹,

Hamid²

2021

Chitin and Chitosan - Physicochemical Properties and Industrial Applications [Working Title]

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Oral delivery is the most common and preferred route of drug administration due to its convenience and ease of administration. However, various factors such as poor solubility, low dissolution rate, stability, and bioavailability of many drugs remain an ongoing challenge in achieving desired therapeutic levels. The delivery of drugs must overcome various obstacles, including the acidic gastric environment, the presence of the intestinal efflux and influx transporters and the continuous secretion of mucus that protects the gastrointestinal tract (GIT). As the number and chemical diversity of drugs has increased, various strategies are required to develop orally active therapeutics. One of the approaches is to use chitosan as a carrier for oral delivery of peptides, proteins as well as vaccines delivery. Chitosan, a non-toxic N-deacetylated derivative of chitin appears to be under intensive progress during the last years towards the development of safe and efficient chitosan-based drug delivery systems. This polymer has been recognised as a versatile biomaterial because of its biodegradability, biocompatibility, and non-toxicity. This chapter reviews the physicochemical characteristics of chitosan and the strategies that have been successfully applied to improve oral proteins, peptides, and vaccines bioavailability, primarily through various formulation strategies.

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“…The properties of β-CD have been extended to polymeric forms via cross-linking, grafting, or non-covalent self-assembly with suitable reagents to yield framework materials with unique inclusion and solid-phase extraction (SPE) properties [ 23 , 24 ]. CS is a linear polysaccharide composed of randomly distributed β-(1 → 4)-linked D-glucosamine and N-acetyl-D-glucosamine units that can be synthetically modified due to its abundant amine and hydroxyl groups [ 25 , 26 ]. Ionic and covalently cross-linked CS frameworks have been reported with adsorption sites that possess variable hydrophile-lipophile balance (HLB), in accordance with the nature of the cross-linker.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Studies of Waterborne Trihalomethanes Using Modified Polysaccharide Adsorbents

2021

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The adsorptive removal of trihalomethanes (THMs) from spiked water samples was evaluated with a series of modified polysaccharide adsorbents that contain β-cylodextrin or chitosan. The uptake properties of these biodegradable polymer adsorbents were evaluated with a mixture of THMs in aqueous solution. Gas chromatography employing a direct aqueous injection (DAI) method with electrolytic conductivity detection enabled quantification of THMs in water at 295 K and at pH 6.5. The adsorption isotherms for the polymer-THMs was evaluated using the Sips model, where the monolayer adsorption capacities ranged between 0.04 and 1.07 mmol THMs/g for respective component THMs. Unique adsorption characteristics were observed that vary according to the polymer structure, composition, and surface chemical properties. The modified polysaccharide adsorbents display variable molecular recognition and selectivity toward component THMs in the mixed systems according to the molecular size and polarizability of the adsorbates.

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Preparation of sulfonated chitosan for enhanced adsorption of methylene blue from aqueous solution

Cited by 83 publications

References 43 publications

Assessment of sulfonation in lignocellulosic derived material for adsorption of methylene blue

Assessment of sulfonation in lignocellulosic derived material for adsorption of methylene blue

Chitosan-Based Oral Drug Delivery System for Peptide, Protein and Vaccine Delivery

Adsorption Studies of Waterborne Trihalomethanes Using Modified Polysaccharide Adsorbents

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