Preparation and characterization of composite cryogels containing imidazole group and use in heavy metal removal

Tekin, Kubilay; Uzun, Lokman; Arpa, Çiğdem; Bektaş, Sema; Deni̇zli̇, Adil

doi:10.1016/j.reactfunctpolym.2011.06.005

Cited by 100 publications

(65 citation statements)

References 40 publications

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“…Third, particles embedding into a cryogel network caused an increase in the specific surface area, which is one of the most efficient parameters on the adsorption capacity. 4,41,42 Finally, the combination of these features formed a synergy to get higher adsorption capacities with fast and efficient adsorption kinetics.…”

Section: Methodsmentioning

confidence: 99%

Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal

Tabaklı

Topçu

Döker

et al. 2015

Ind. Eng. Chem. Res.

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Herein, we have reported particle-assisted ion-imprinted cryogels, which were synthesized by embedding finely crushed functional particles into cryogel structure under semifrozen conditions. These cryogels showed high adsorption efficiency and affinity against Cd II ions. Cd II adsorption performances were evaluated by varying some effective factors. In order to analyze the data, we applied Langmuir and Freundlich adsorption isotherms while using three different kinetic models, pseudo-first-order, pseudo-second-order, and Weber−Morris as well. Also, the dimensionless equilibrium parameter (R L ), initial adsorption rate, and half-adsorption time were calculated. The results revealed that ion-imprinted-polymer (IIP) cryogels have homogeneously distributed cavities, which were formed by a particle-assisted imprinting process, and the theoretical maximum adsorption capacity (Q max , 35.97 μg/g) was very close to the experimental value (Q eq , 32.15 μg/g). In addition, R L values for both IIP and nonimprinted-polymer cryogels showed favorability of the adsorption process, while kinetic models indicated that there were no diffusion limitations during the adsorption process, which means that the rate-limiting step was chemosorption of heavy-metal ions on binding sites (imprinted cavities or functional groups) with a high initial adsorption rate and a low half-adsorption time. Desorption, reusability, and selectivity studies were also conducted to state the performance of the cryogels. In conclusion, this promising approach provides a novel methodology for selective Cd II removal from water sources.

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Section: Methodsmentioning

confidence: 99%

Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal

Tabaklı

Topçu

Döker

et al. 2015

Ind. Eng. Chem. Res.

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“…In addition, the results show that anti-HBs molecules easily move through inter-connected channels of CMs, reaching to and interacting with specific cavities of the embedded porous particles and binding to interaction binding sites (i.e. antibody imprinted cavities) [27]. Here, it should be emphasized the adsorption process was occurred quickly.…”

Section: Effect Of Initial Anti-hbs Concentrationmentioning

confidence: 90%

“…Despite of the fact that cryogels have several advantages; the main problem to deal is low specific surface area that causes lower adsorption capacities. Embedding of small particles into cryogel structure or direct cryogelation of particles are encouraging alternatives to deal the problem [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Molecular imprinting based composite cryogel membranes for purification of anti-hepatitis B surface antibody by fast protein liquid chromatography

Aslıyüce

Uzun

Rad

et al. 2012

Journal of Chromatography B

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“…Adsorption has increasingly received much attention in recent years because the method is simple, relatively low-cost and effective in removing heavy metal ions from water [6]. Among these methods, adsorption is widely used to remove heavy metal ions from waters [7][8][9][10][11].…”

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confidence: 99%

“…Having many advantages, like structural flexibility, large pores and short diffusion pathways, cryogels can be one of the best choices for adsorption of heavy metal ions. Besides these advantages, they are also cheap, simple to produce in any shape and are not toxic to the environment [10]. However, they have relatively low specific surface area resulting in low adsorption capacity in the adsorption process.…”

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confidence: 99%

Removal of Heavy Metals From Aqueus Solution Using Activated Carbon Embedded Cryogels

Haktanır¹

2017

HJBC

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Ö ZB u çalışmada poli(hidroksi metakrilat) temelli aktif karbon gömülü kriyojel diskler sentezlenmiş, karakterize edilmiş ve sulu çözeltilerden ağır metal giderimi incelenmiştir. Sentezlenen kompozit kriyojel disklerin adsorpsiyon kapasitesine pH ve başlangıç metal iyonu derişiminin etkisi kesikli adsorpsiyon süreci kullanılarak incelenmiştir. Metal iyonlarının desorpsiyon çalışmaları gerçekleştirilmiş ve ard arda yapılan beş adsorpsiyondesorpsiyon döngüsünden sonra kriyojellerin belirgin bir kapasite kaybına uğramadan tekrar kullanılabildiği gözlenmiştir. Anahtar KelimelerAdsorpsiyon, Ağır metal, Aktif karbon, Kriyojel. A B S T R A C TI n this study poly(hydroxyethyl methacrylate) (PHEMA) based activated carbon (AC) embedded cryogel discs were synthesized, characterized and their application for nickel and copper removal from aqueous solutions were investigated. The effect of pH and initial metal concentration on the adsorption capacity of the cryogels were studied in batch systems. Desorption of heavy metal ions was also studied and it was shown that synthesized discs could be repeatedly used without significant loss in the adsorption capacity after five repetitive adsorption-desorption processes.

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Preparation and characterization of composite cryogels containing imidazole group and use in heavy metal removal

Cited by 100 publications

References 40 publications

Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal

Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal

Molecular imprinting based composite cryogel membranes for purification of anti-hepatitis B surface antibody by fast protein liquid chromatography

Removal of Heavy Metals From Aqueus Solution Using Activated Carbon Embedded Cryogels

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Preparation and characterization of composite cryogels containing imidazole group and use in heavy metal removal

Cited by 100 publications

References 40 publications

Particle-Assisted Ion-Imprinted Cryogels for Selective CdIIIon Removal

Particle-Assisted Ion-Imprinted Cryogels for Selective CdIIIon Removal

Molecular imprinting based composite cryogel membranes for purification of anti-hepatitis B surface antibody by fast protein liquid chromatography

Removal of Heavy Metals From Aqueus Solution Using Activated Carbon Embedded Cryogels

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Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal

Particle-Assisted Ion-Imprinted Cryogels for Selective Cd^IIIon Removal