Fabrication of porous polyethyleneimine-functionalized chitosan/Span 80 microspheres for adsorption of diclofenac sodium from aqueous solutions

Jiang, Fangyuan; Zhang, Dachao; Ouyang, Xiaolong; Yang, Li‐Ye

doi:10.1016/j.scp.2021.100418

Cited by 16 publications

(6 citation statements)

References 43 publications

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“…It can be envisaged that the electrostatic repulsion forces between the negatively charged grafted CS beads, shown in Figure S1, and the negatively charged DCF have counteracted the effect of other interaction mechanisms. As shown in Figure 6b, both q e and R% of the crosslinked CS increase with an increase in the initial concentration of DCF as a result of the increase in the mass transfer rate arising from the concentration gradient [49,52,53] till the point of saturation of the active sites where a plateau is observed [26,52]; however, q e of the grafted CS does not appreciably change with concentration. The adsorption efficiencies of diclofenac potassium onto the grafted beads were significantly improved compared to the unfunctionalized chitosan beads, reaching values above 90% with rapid adsorption occurring within 20 min for all grafted sample combinations.…”

Section: Adsorption Of Dcf Under Different Operational Parametersmentioning

confidence: 93%

“…However, q e decreases for the grafted CS, indicating an agglomeration of the particles, which reduces the surface area available for adsorption [26]. The removal, however, increases with an increase in the adsorbent dose [53]. The time profiles for the adsorption of DCF onto the crosslinked CS and grafted CS (Figure 6d) manifest faster adsorption kinetics onto the grafted beads.…”

Section: Adsorption Of Dcf Under Different Operational Parametersmentioning

confidence: 98%

“…The survey XPS spectra of CS, P(IA)-g-CS-I0.02-M3, and P(IA)-g-CS-I0.02-M3-DCF revealed the three elements contained in the tested adsorbents, namely O, N, and C (Figure 5a). As shown in Figure 5a, three peaks are observed in the C1s spectrum of CS at 284.43, 285.85, and 287.09 eV corresponding to C-O, C-N, and C=O groups, respectively [52,53]. Interestingly, the proportion of C-C distinctly increased from 44.44% to 65.56% after grafting (Figure 5b) due to the increase in the content of C-C on the surface of grafted CS beads.…”

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 99%

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Impact of the Configurational Microstructure of Carboxylate-Rich Chitosan Beads on Its Adsorptive Removal of Diclofenac Potassium from Contaminated Water

Elsayed,

Hassanein,

El-Sayed

et al. 2023

Polymers

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A novel adsorbent–contaminant system was investigated for its ability to remove a contaminant of emerging concern, diclofenac potassium, from contaminated water. Bio-based crosslinked chitosan beads functionalized with poly(itaconic acid) side chains were examined for their potential to remove the emerging contaminant. To evaluate the impact of the polymeric microstructure on its adsorptive capacity, several adsorbent samples were prepared using different combinations of initiator and monomeric concentrations. Fourier Transform Infrared (FTIR) analysis confirmed the crosslinking of the chitosan chains and the incorporation of the carboxylic groups on the surface of the final chitosan beads. After the grafting copolymerization process, an additional peak at 1726 cm−1 corresponding to the carboxylic C=O groups of the grafted chains appeared, indicating the successful preparation of poly(IA)-g-chitosan. Thermal stability studies showed that the grafting copolymerization improved the thermal stability of the beads. X-ray and Scanning Electron Microscopy confirmed the successful grafting of the itaconic acid on the surface of the beads. The study revealed that the higher the initiator concentration, the greater the number of side chains, whereas the higher the monomeric concentration, the longer the length of these side chains. The adsorption mechanism involved hydrogen bonding to the carboxylic groups of the grafted chains along with n-π* stacking interaction between the amino group of the chitosan and the aromatic rings of diclofenac potassium. The adsorption efficiencies of diclofenac potassium onto the grafted beads were significantly improved compared to the unfunctionalized chitosan beads, reaching values above 90%. The removal efficiency of grafted chitosan increased with an increase in the concentration in the range of 10–30 ppm and then flattened out in the range of 30–50 ppm. The removal efficiencies of 1–50 ppm of DCF ranged between about 75% and 92% for the grafted chitosan and 30–45% for the crosslinked chitosan. Rapid adsorption occurred within 20 min for all grafted sample combinations, and the adsorption kinetics followed a pseudo-second-order model with qe values ranging from 28 to 44.25 g/mg and R2 values greater than 0.9915. The results highlight the potential of grafted chitosan beads in removing emerging contaminants from contaminated water without harming the environment.

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Section: Adsorption Of Dcf Under Different Operational Parametersmentioning

confidence: 93%

Section: Adsorption Of Dcf Under Different Operational Parametersmentioning

confidence: 98%

Section: X-ray Photoelectron Spectroscopy (Xps) Analysismentioning

confidence: 99%

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Impact of the Configurational Microstructure of Carboxylate-Rich Chitosan Beads on Its Adsorptive Removal of Diclofenac Potassium from Contaminated Water

Elsayed,

Hassanein,

El-Sayed

et al. 2023

Polymers

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“…[10] Similarly, in studies on diclofenac sodium adsorption using graphene oxide-chitosan, polyethylenimine-chitosan/ Span 80, and magnetic chitosan polymers, the highest diclofenac sodium removal was observed at pH 5. [23][24][25] In a study investigating diclofenac sodium adsorption by preparing sodium alginate/cellulose nanocrystal/polyvinyl alcohol microspheres, it was reported that the highest diclofenac sodium removal occurred at pH 4.5. [1]…”

Section: Effect Of Ph On Tetracycline and Diclofenac Sodium Removalmentioning

confidence: 99%

Adsorption of Diclofenac Sodium and Tetracycline From Aqueous Solution Using PVA Films Prepared with Modal/Cotton Fiber Wastes

Kaplica,

Şafak,

Çifçi

2024

ChemistrySelect

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In this study, fiber‐polymer composite films were prepared by adding 0.5 g, 1.0 g, and 1.5 g of modal/cotton (50 : 50) waste to 10 % PVA film, and the properties of the films were revealed by SEM, FTIR analyzes and swelling percentage. It is observed that the strength of the bonds in the FTIR analysis decreases when modal/cotton fibers are added to the PVA film. While a 406 % swelling is achieved in the PVA film, the swelling percentages of the films decrease when modal/cotton fibers are added to the PVA film, and a greater swelling is observed at pH 9 compared to pH 5. The adsorption efficiency of tetracycline and diclofenac sodium on the films was researched at different pH levels and film doses. Tetracycline removal reached its highest value at pH 9, while diclofenac sodium removal reached its highest value at pH 5. Langmuir and Freundlich isotherm models were determined for tetracycline and diclofenac sodium adsorption. Tetracycline removal is better described by the Freundlich isotherm model, whereas diclofenac sodium removal fits the Langmuir isotherm model better. As a result, films prepared with modal/cotton waste not only provide tetracycline and diclofenac sodium removal but also contribute to waste recycling by utilizing waste fiber materials.

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“…To ensure optimal adsorption capacity of each material, we used orthogonal experiments to optimize the mass ratios of Fe-CNC, Alg, and Kc in AlKFc [33]. For this, 20 mg of each type of bead was added to a 500 ppm Pb 2+ solution (15 mL) to determine the removal rate, R (%), for each group, and the results are shown in Table 1.…”

Section: Optimization Of the Mass Ratio Of Materialsmentioning

confidence: 99%

Adsorption of Pb(II) from Aqueous Solutions Using Nanocrystalline Cellulose/Sodium Alginate/K-Carrageenan Composite Hydrogel Beads

Shen

Ouyang

et al. 2021

J Polym Environ

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Based on the excellent performances of nanocrystalline cellulose, sodium alginate, or K-carrageenan in Pb 2+ adsorption, nanocrystalline cellulose/sodium alginate/K-carrageenan composite hydrogel beads were prepared to adsorb Pb(II) from aqueous solutions. The objective of this study was to demonstrate the excellent potential of the composite hydrogel beads for heavy metal ion adsorption. We successfully prepared ecofriendly Fe-modified nanocrystalline cellulose/sodium alginate/Kcarrageenan composite hydrogel beads and characterized them. The structure and adsorption mechanism were investigated using scanning electron microscopy, Fourier-transform infrared spectroscopy, and X-ray photoelectron spectroscopy, and the optimal adsorption conditions were determined. The tricomponent hydrogel beads were robust and exhibited improved adsorption capacity for Pb 2+ and good reusability. The adsorption results could be fitted well with a pseudo-second-order kinetic model and the Langmuir adsorption model. The maximum adsorption capacity obtained by fitting was 351.04 mg g −1 .Recycling experiments revealed that the adsorption capacity of the adsorbent remained high after five cycles of reuse.

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Fabrication of porous polyethyleneimine-functionalized chitosan/Span 80 microspheres for adsorption of diclofenac sodium from aqueous solutions

Cited by 16 publications

References 43 publications

Impact of the Configurational Microstructure of Carboxylate-Rich Chitosan Beads on Its Adsorptive Removal of Diclofenac Potassium from Contaminated Water

Impact of the Configurational Microstructure of Carboxylate-Rich Chitosan Beads on Its Adsorptive Removal of Diclofenac Potassium from Contaminated Water

Adsorption of Diclofenac Sodium and Tetracycline From Aqueous Solution Using PVA Films Prepared with Modal/Cotton Fiber Wastes

Adsorption of Pb(II) from Aqueous Solutions Using Nanocrystalline Cellulose/Sodium Alginate/K-Carrageenan Composite Hydrogel Beads

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