Preparation of porous chitosan gel beads for copper(II) ion adsorption

A new method to fabricate porous chitosan nerve conduits with multi-channels was described. A uniquely designed mold was composed of 7-50 stainless steel needles and a set of plastic pedestals. Porous or imperforate chitosan tubes with 2-5mm inner diameter and 0.2-1.0 mm wall thickness were made firstly. The chitosan tubes were injected with 3% chitosan gel. The stainless steel needles longitudinally perforated through the chitosan tubes filled with chitosan gel, and the plastic pedestals were used to fix the needles. Lyophilization was used to finish fabrication. The diameter of channels was 0.2-0.4mm. Swelling property and biodegradability of Multi-channeled chitosan conduits were investigated. Wright’s staining and scanning electron microscope (SEM) were used to observe spread and proliferation of Neuroblastoma cells (N2A, mouse) on the conduits. It is promising that the porous chitosan nerve conduits with multi-channels are used as nerve tissue engineering scaffolds in repair of peripheral nerve and spinal cord injuries.

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Equilibrium modeling of mono and binary sorption of Cu(II) and Zn(II) onto chitosan gel beads

Chemical and Process Engineering ◽

10.1515/cpe-2016-0040 ◽

2016 ◽

Vol 37 (4) ◽

pp. 485-501 ◽

Cited By ~ 1

Author(s):

Józef Nastaj ◽

Małgorzata Tuligłowicz ◽

Konrad Witkiewicz

Keyword(s):

Metal Ion ◽

Ph Value ◽

Experimental Studies ◽

Process Conditions ◽

Optimal Process ◽

Sorption Data ◽

Gel Beads ◽

Two Component ◽

Equilibrium Data ◽

Chitosan Gel

Abstract The objective of the work are in-depth experimental studies of Cu(II) and Zn(II) ion removal on chitosan gel beads from both one- and two-component water solutions at the temperature of 303 K. The optimal process conditions such as: pH value, dose of sorbent and contact time were determined. Based on the optimal process conditions, equilibrium and kinetic studies were carried out. The maximum sorption capacities equaled: 191.25 mg/g and 142.88 mg/g for Cu(II) and Zn(II) ions respectively, when the sorbent dose was 10 g/L and the pH of a solution was 5.0 for both heavy metal ions. One-component sorption equilibrium data were successfully presented for six of the most useful three-parameter equilibrium models: Langmuir-Freundlich, Redlich-Peterson, Sips, Koble-Corrigan, Hill and Toth. Extended forms of Langmuir-Freundlich, Koble-Corrigan and Sips models were also well fitted to the two-component equilibrium data obtained for different ratios of concentrations of Cu(II) and Zn(II) ions (1:1, 1:2, 2:1). Experimental sorption data were described by two kinetic models of the pseudo-first and pseudo-second order. Furthermore, an attempt to explain the mechanisms of the divalent metal ion sorption process on chitosan gel beads was undertaken.

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Nanoparticles of KFeP2O7implanted on silica gel beads for Cd2+ion adsorption

Environmental Technology ◽

10.1080/09593330.2014.941942 ◽

2014 ◽

Vol 36 (2) ◽

pp. 188-197 ◽

Cited By ~ 4

Author(s):

Eduardo Ordoñez-Regil ◽

Francisco Granados-Correa ◽

Enrique Ordoñez-Regil ◽

María Guadalupe Almazán-Torres

Keyword(s):

Silica Gel ◽

Ion Adsorption ◽

Gel Beads

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Preparation and characterization of porous chitosan–based membrane with enhanced copper ion adsorption performance

Reactive and Functional Polymers ◽

10.1016/j.reactfunctpolym.2020.104681 ◽

2020 ◽

Vol 154 ◽

pp. 104681 ◽

Cited By ~ 1

Author(s):

Nadia Sahebjamee ◽

Mohammad Soltanieh ◽

Seyed Mahmoud Mousavi ◽

Amir Heydarinasab

Keyword(s):

Copper Ion ◽

Ion Adsorption ◽

Adsorption Performance ◽

Porous Chitosan

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Adsorption kinetics and adsorption isotherm studies of chromium from aqueous solutions by HPAM-chitosan gel beads

Desalination and Water Treatment ◽

10.1080/19443994.2012.692061 ◽

2012 ◽

Vol 45 (1-3) ◽

pp. 222-228 ◽

Cited By ~ 11

Author(s):

Wei Kuang ◽

Yebang Tan ◽

Lihong Fu

Keyword(s):

Adsorption Isotherm ◽

Aqueous Solutions ◽

Adsorption Kinetics ◽

Gel Beads ◽

Chitosan Gel

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Synthesis of Modified Chitosan Gel Beads and Adsorption Performance of Cu(II)

Water Air & Soil Pollution ◽

10.1007/s11270-020-04636-5 ◽

2020 ◽

Vol 231 (6) ◽

Author(s):

Shan Liu ◽

Xuanni Li ◽

Tao Li ◽

Lei Liao ◽

Lei Cao ◽

...

Keyword(s):

Modified Chitosan ◽

Adsorption Performance ◽

Gel Beads ◽

Chitosan Gel

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Adsorption of Mercury(II) Ions on Procion Blue MX-3G-attached Magnetic Poly(Vinyl Alcohol) Gel Beads

Adsorption Science & Technology ◽

10.1260/026361702760120953 ◽

2002 ◽

Vol 20 (1) ◽

pp. 91-106 ◽

Cited By ~ 9

Author(s):

Adil Denizli ◽

Çiğdem Arpa ◽

Sema Bektas ◽

Ömer Genç

Keyword(s):

Vinyl Alcohol ◽

Spherical Shape ◽

Poly Vinyl Alcohol ◽

Ion Adsorption ◽

Langmuir Adsorption ◽

Gel Beads ◽

Spin Resonance ◽

Magnetite Particles ◽

Ph Range ◽

Plateau Level

Magnetic poly(vinyl alcohol) (mPVAL) gel beads (150–200 μm in diameter) carrying Procion Blue MX-3G (122 μmol/g) were used for the removal of different amounts (50–650 mg/l) of Hg(II) ions from aqueous solutions. The mPVAL gel beads were characterized by swelling tests, electron spin resonance (ESR), elemental analysis and scanning electron microscopy (SEM). The swelling ratio of the mPVAL gel beads, which had a spherical shape and porous structure, was 76%. The presence of magnetite particles in the polymeric structure was confirmed by ESR spectroscopy. The capacity of the beads towards Hg(II) ions increased with time during the first 10 min of adsorption and then levelled off towards an equilibrium adsorption capacity. The adsorption of Hg(II) ions on the plain beads was very low (0.57 mg/g) but increased substantially (to 69.2 mg/g) on beads to which Procion Blue MX-3G had been attached. The Langmuir adsorption isotherm was applicable to the description of Hg(II) ion adsorption by Procion Blue MX-3G-attached mPVAL gel beads. Such adsorption increased with increasing pH of the aqueous medium and reached a plateau level at ca. pH 6.0. The optimal pH range for Hg(II) ion adsorption was 6.0–7.0. More than 95% of the adsorbed Hg(II) ions was desorbed within 15 min when 0.1 M HNO3 was used as an elution agent. Regeneration of the Procion Blue MX-3G-attached mPVAL gel beads under these conditions was also reasonable.

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