Novel magnetic chitosan/poly(vinyl alcohol) hydrogel beads: Preparation, characterization and application for adsorption of dye from aqueous solution

Zhu, Huihui; Fu, Yongqian; Jiang, Ru; Yao, Jun; Xiao, Ling; Zeng, Guangming

doi:10.1016/j.biortech.2011.11.057

Cited by 259 publications

(71 citation statements)

References 39 publications

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“…In Fig. 2(d) 1°when the blend has been formed between PVA and CTS [16,17]. However, the intensity of peaks decline obviously in curve b, which indicates a decrease in the crystallinity of CTS.…”

Section: Characterization Of Compositesmentioning

confidence: 85%

“…The blends have good mechanical and chemical properties. Furthermore, the blends have been applied for the adsorption of heavy metal ions [3,5] and dye [17]. Magnetic separation has been one of the promising ways for an environmental purification technique because of producing no contaminants such as flocculants and having capability of treating a large amount of wastewater within a short time [3,[9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Ni(II) ion on Ni(II) ion-imprinted magnetic chitosan/poly(vinyl alcohol) composite

et al. 2015

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Magnetic chitosan/poly(vinyl alcohol)/Ni(II) beads (m-CTS/PVA/Ni(II)s) were prepared by blending CTS, PVA, Ni(II), and Fe 3 O 4 . Ni(II)-imprinted m-CTS/PVA beads (Ni(II)-IMCPs) were obtained by eluting Ni(II) ions from the m-CTS/PVA/Ni(II)s. The optimal conditions for preparing Ni(II)-IMCPs are 2.0 % (w/w) for CTS, 1.5 % (w/w) for PVA, 0.8 % (w/w) for Ni (NO 3 ) 2 , and 2.0 % (w/w) for Fe 3 O 4 . The Fourier transform infrared spectroscopy (FT-IR) analysis implies that the coordinating atoms may be N atom of -NH 2 in chitosan and O atom of -OH in poly(vinyl alcohol). The X-ray diffraction (XRD) patterns indicate that there are the Fe 3 O 4 characteristic diffraction peaks and the decrease of the crystallinity for CTS. The study on the adsorptive performances of Ni(II)-IMCPs shows that the process of adsorption is good fitted to Langmuir model and the maximum adsorption capacity of Ni(II)-IMCPs for Ni(II) ions is 500.0 mg g −1 (conditions: V=20 mL, m=0.050 g, contact time=6 h, at 25°C). Kinetic models were used for interpreting data obtained from batch experiments, which show that the whole adsorption processes for Ni(II) ions on Ni(II)-IMCPs are in accordance with pseudo-second-order kinetic equation. The study of repeating and selective adsorption indicates that Ni(II)-IMCPs have good durability and selectivity for Ni(II) ions.

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Section: Characterization Of Compositesmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Adsorption of Ni(II) ion on Ni(II) ion-imprinted magnetic chitosan/poly(vinyl alcohol) composite

et al. 2015

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“…These research results could provide new insights into the preparation of advanced adsorbents. 28 Then, 0.2 g of CS/EPTAC was dissolved in 20 mL of distilled water, and a specified amount of Fe 3 O 4 was added to this solution. After ultrasonic dispersion, a certain amount of MO was added and mixed for 1 h with stirring.…”

Section: Introductionmentioning

confidence: 99%

Preparation of a porous, magnetic, quaternary chitosan salt by preadsorption and desorption for azo dye adsorption from water

Zhang

Zhu

et al. 2016

J of Applied Polymer Sci

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A porous magnetic quaternary chitosan salt (pre-CS/EPTAC/Fe 3 O 4 ) was successfully prepared via a kind of novel method of preadsorption and desorption. The physicochemical properties of pre-CS/EPTAC/Fe 3 O 4 were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, and vibrating sample magnetometry. The adsorption of pre-CS/EPTAC/Fe 3 O 4 for methyl orange (MO) showed much higher dye uptakes compared with Npre-CS/EPTAC/Fe 3 O 4 without the preadsorption and desorption of MO, and the maximum adsorption capability for MO was 486.1 mg/g. Adsorption isotherms and adsorption kinetics were well fitted by the Freundlich isotherm model and the pseudo-second order model, respectively. Thermodynamic parameters, such as the standard free energy change, enthalpy change, and entropy change, were also calculated; this indicated that the adsorption was spontaneous and exothermic. The introduction of MO preadsorption and desorption into the process of preparation improved not only the adsorption of MO but also the adsorption of acid red 1 and orange G. Furthermore, pre-CS/EPTAC/Fe 3 O 4 particles could be easily regenerated and remained almost constant (98.5%) for six cycles of adsorption and desorption.

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“…Chitosan has several disadvantages when used directly as an adsorbent such as its dissolve in acidic solution, prone to swelling, weak mechanical stability and small adsorption capacity for certain metal ions [4]. Chitosan can be modified by cross-linking [6], immobilizing into a matrix support [11] and blending [12] to make chitosan that stable in acid and has good mechanical properties. The cross-linking procedure may be performed by reaction of chitosan with different reagent such as epichlorhydrin (ECH) [13] glutaraldehyde (GLA) [14][15] and EGDE (16)(17)(18).…”

Section: Introductionmentioning

confidence: 99%

“…The cross-linking procedure may be performed by reaction of chitosan with different reagent such as epichlorhydrin (ECH) [13] glutaraldehyde (GLA) [14][15] and EGDE (16)(17)(18). Though cross-linking reduces the adsorption capacity, but it will increase the stability of the polymer [12].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Pb(II) Imprinted Carboxymethyl Chitosan and the Application as Sorbent for Pb(II) Ion

Masykur¹,

Santosa²,

Siswanta³

et al. 2014

Indones. J. Chem.

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The aims of this research is to synthesize Pb(II) imprinted polymers with carboxymethyl chitosan (CMC) as polymers and bisphenol A diglycidyl ether (BADGE) as cross-linker (Pb-IIP). Chitosan (CTS), non imprinted polymer (NIP) and NIP gave higher adsorption selectivity for Pb(II)/Ni(II) and Pb(II)/Cu(II), whereas Pb-IIP showed higher adsorption selectivity for Pb(II)/Cd(II).The hydrogen bonding dominated interaction between Pb(II) ion on NIP and Pb-IIP. Keywords: ion imprinted polymers; carboxymethyl chitosan; BADGE; adsorption; Pb(II) ion ABSTRAK Tujuan penelitian ini adalah mensintesis material imprinting ion Pb(II) pada karboksimetil kitosan dengan kroslingker bisfenol A diglisidil eter (BADGE) (Pb-IIP). Kitosan (CTS), non imprinting polimer (NIP), dan Pb-IIP dikarakterisasi dengan spektrofotometer FTIR, difraksi sinar-X (XRD), analisis luas permukaan (SAA), mikroskop elektron (SEM) dan dispersif energi sinar-X (EDX). Hasil penelitian menunjukkan bahwa adsorpsi ion Pb(II) optimum pada pH 5 dan waktu kontak 250 menit. Adsorpsi ion Pb(II) pada semua adsorben mengikuti persamaan kinetika pseudo orde-dua. Adsorpsi ion Pb(II) pada CTS mengikuti isoterm adsorpsi BADGE; adsorpsi; Pb(II)

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Novel magnetic chitosan/poly(vinyl alcohol) hydrogel beads: Preparation, characterization and application for adsorption of dye from aqueous solution

Cited by 259 publications

References 39 publications

Adsorption of Ni(II) ion on Ni(II) ion-imprinted magnetic chitosan/poly(vinyl alcohol) composite

Adsorption of Ni(II) ion on Ni(II) ion-imprinted magnetic chitosan/poly(vinyl alcohol) composite

Preparation of a porous, magnetic, quaternary chitosan salt by preadsorption and desorption for azo dye adsorption from water

Synthesis of Pb(II) Imprinted Carboxymethyl Chitosan and the Application as Sorbent for Pb(II) Ion

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