Evaluation on the adsorption capability of chemically modified macroporous adsorption resin with ionic liquid

Wu, Xiaoyu; Liu, Yi; Liu, Yongfeng; Di, Duolong

doi:10.1016/j.colsurfa.2015.01.001

Cited by 26 publications

(19 citation statements)

References 38 publications

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“…The experimental data were also fitted to the Freundlich equation:

where K f is the Freundlich constant (an indicator of adsorption capacity); and 1/n is an empirical constant related to the magnitude of the adsorption driving force [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

“…Figure 5 shows that the pH of crude extracts (pH range 2-10) had no significant effect on the adsorption capacities and adsorption/desorption ratios of PGMA-III. A high degree of ionic interaction still existed between the sulfate moiety -SO3 − of glucoerucin and the -N + (CH3)3 functional group of adsorbent which was not influenced by the change in pH; the ionization of the functional The Langmuir equations and Freundlich equations are usually used to reveal the linearity fitting and interaction of solutes with the adsorbents [21][22][23].…”

Section: Static Adsorption and Desorptionmentioning

confidence: 99%

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Preparation of Poly(glycidyl methacrylate) (PGMA) and Amine Modified PGMA Adsorbents for Purification of Glucosinolates from Cruciferous Plants

Cheng

Liang

et al. 2020

Molecules

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Glucosinolates (GLs) are of great interest for their potential as antioxidant and anticancer compounds. In this study, macroporous crosslinked copolymer adsorbents of poly (glycidyl methacrylate) (PGMA) and its amine (ethylenediamine, diethylamine, triethylamine)-modified derivatives were prepared and used to purify the GLS glucoerucin in a crude extract obtained from a cruciferous plant. These four adsorbents were evaluated by comparing their adsorption/desorption and decolorization performance for the purification of glucoerucin from crude plant extracts. According to the results, the strongly basic triethylamine modified PGMA (PGMA-III) adsorbent showed the best adsorption and desorption capacity of glucoerucin, and its adsorption data was a good fit to the Freundlich isotherm model and pseudo-second-order kinetics; the PGMA adsorbent gave the optimum decolorization performance. Furthermore, dynamic adsorption/desorption experiments were carried out to optimize the purification process. Two glass columns were serially connected and respectively wet-packed with PGMA and PGMA-III adsorbents so that glucoerucin could be decolorized and isolated from crude extracts in one process. Compared with KCl solution, aqueous ammonia was a preferable desorption solvent for the purification of glucoerucin and overcame the challenges of desalination efficiency, residual methanol and high operation costs. The results showed that after desorption with 10% aqueous ammonia, the purity of isolated glucoerucin was 74.39% with a recovery of 80.63%; after decolorization with PGMA adsorbent, the appearance of glucoerucin was improved and the purity increased by 11.30%. The process of using serially connected glass columns, wet-packed with PGMA and PGMA-III, may provide a simple, low-cost, and efficient method for the purification of GLs from cruciferous plants.

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“…The experimental data were also fitted to the Freundlich equation:

where K f is the Freundlich constant (an indicator of adsorption capacity); and 1/n is an empirical constant related to the magnitude of the adsorption driving force [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

Section: Static Adsorption and Desorptionmentioning

confidence: 99%

Preparation of Poly(glycidyl methacrylate) (PGMA) and Amine Modified PGMA Adsorbents for Purification of Glucosinolates from Cruciferous Plants

Cheng

Liang

et al. 2020

Molecules

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“…The pseudo-second-order kinetic model assumed that the rate-limiting step might be adsorption, which is in agreement with the principle that chemical adsorption was the rate-controlling step [34]. The pseudo-second-order equation is as follows [34]:…”

Section: Adsorption Kineticsmentioning

confidence: 95%

“…The pseudo-first-order model assumed that the change in the adsorbed solute with time is proportional to the difference of the equilibrium adsorption capacity and the adsorbed amount [34]. A linear form of pseudo-first-order model can be written as follows [34]:…”

Section: Adsorption Kineticsmentioning

confidence: 99%

A novel polymeric adsorbent by a self-doped manner: synthesis, characterization, and adsorption performance to phenol from aqueous solution

et al. 2016

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The organic-inorganic self-doped poly (vinyltrimethoxy silane-ethylene glycol dimethacrylate) (VE resin) was synthesized by solution polymerization, hydrolysis and dehydration condensation. In this method, ethylene glycol dimethacrylate (EGDMA) was used as cross-linked reagent to form a three-dimensional network structure. Then, the system was prepared by radical polymerization in the presence of the hydrolysis of -OCH 3 and the dehydration condensation of Si-OH. The maximum adsorption capacity 75.68 mg g -1 was achieved when pH was 6, the contact time 60 min, the adsorbent dose 0.1 g, the initial concentration 3000 mg L -1 and the temperature 293 K. The adsorption kinetics followed the pseudo-second-order kinetic model, and the intra-particle diffusion was but not the only rate-limiting step. Adsorption isotherms of phenol were linearly correlated and found to be well represented by the Freundlich model. Thermodynamic parameters such as changes in the enthalpy (DH), free energy (DG) and entropy (DS) indicated that the adsorption process of phenol on VE resin were physical and exothermic. After four regeneration recycles, the adsorption capacity of VE resin remained at 95.04 % of the initial value, which illustrated that it possessed good regeneration capacity.

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“…In our previous studies, ILs are used for the rst time as adsorbent to modify macroporous adsorption resins and purify avonoids from Hippophae rhamnoides L. leaves. 21 Catechins are the most abundant components in tea polyphenolic avonoids, comprising (À)-epigallocatechin gallate (EGCG), (À)-epicatechin gallate (ECG), (À)-epigallocatechin (EGC), and (À)-epicatechin (EC). 19,20 ILs are primarily advantageous because of their tunability, low melting point, and wide range of solubility and viscosity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, characterization, and adsorption properties of ionic liquid-modified hypercrosslinked polystyrene resins

Liu

et al. 2015

RSC Adv.

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A series of ionic liquid modified hypercrosslinked polystyrene resins are synthesized by adding different quantities of imidazole in the Friedel-Crafts reaction. The resins are characterized by nitrogen adsorption/desorption, Fourier transform infrared spectroscopy, elemental analysis and scanning electron microscopy. The adsorption properties of (À)-epigallocatechin gallate and (À)-epicatechin are investigated and compared with macroporous adsorption resins Seplite D101 and Seplite AB-8. The (À)-epigallocatechin gallate and (À)-epicatechin uptakes on HP-IL16 are remarkably larger than those of macroporous adsorption resins Seplite D101 and Seplite AB-8. The maximum adsorption capacity of HP-IL16 are up to 73.1 mg g À1 for (À)-epigallocatechin gallate and 93.0 mg g À1 for (À)-epicatechin. The adsorption isotherms are best described by the Langmuir model, and their adsorption kinetics follow the pseudo-second-order kinetic equation and intra-particle diffusion model. Analysis of the adsorption mechanism suggest that the synergistic effect of the specific surface area, molecular sieving effect, and multiple adsorption interactions are the driving forces of adsorption. The resin is reusable and presents a good desorption rate. Based on these results, this study opens up the possibility of synthesizing ionic liquid modified hypercrosslinked polymeric resins for purification of catechin from herbal plants.

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Evaluation on the adsorption capability of chemically modified macroporous adsorption resin with ionic liquid

Cited by 26 publications

References 38 publications

Preparation of Poly(glycidyl methacrylate) (PGMA) and Amine Modified PGMA Adsorbents for Purification of Glucosinolates from Cruciferous Plants

Preparation of Poly(glycidyl methacrylate) (PGMA) and Amine Modified PGMA Adsorbents for Purification of Glucosinolates from Cruciferous Plants

A novel polymeric adsorbent by a self-doped manner: synthesis, characterization, and adsorption performance to phenol from aqueous solution

Synthesis, characterization, and adsorption properties of ionic liquid-modified hypercrosslinked polystyrene resins

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