Environment friendly modified chitosan hydrogels as a matrix for adsorption of metal ions, synthesis and characterization

Kandile, Nadia G.; Nasr, Abir S.

doi:10.1016/j.carbpol.2009.06.008

Cited by 83 publications

(25 citation statements)

References 14 publications

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“…A number of functional groups, including carboxylate, hydroxyl, sulfate, phosphate, amide, and amino groups, have been found to be effective in metal sorption [8,9]. Among these, the amine group is very effective for removing heavy metals.…”

Section: Introductionmentioning

confidence: 99%

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

et al. 2014

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Chemically cross-linked composite gels based on bentonite clay from Manyrak deposit (Kazakhstan Republic) and nonionic polymers, i.e., poly(hydroxyethylacrylate) and poly(acrylamide), were polymerized in situ after preliminary intercalation of monomers in an aqueous suspension of bentonite clay. By means of cryo-scanning electron microscopy, it was shown that bentonite clay is well incorporated into the gel network structure with pore sizes up to 1.5 μm. The intercalated bentonite clay can adsorb cationic surfactants as well as heavy metal ions due to electrostatic interactions. Conductometric and surface tension measurements indicate not only the adsorption of surfactants and heavy metals inside the hydrogel, but also the displacement of the critical micellization concentration (CMC) of the surfactants.

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Section: Introductionmentioning

confidence: 99%

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

et al. 2014

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“…Hydrogels are slightly crosslinked hydrophilic functional polymer materials with unique 3D network structure and water-swellable properties. Owing to the advantages of hydrogel as a soft material over other materials, it has been extensively applied in many fields such as hygienic products [4], agriculture [5,6], wastewater treatment [7][8][9][10], carrier of catalyst [11,12], drug-delivery systems [13,14] and bioengineering material [15].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, swelling and responsive properties of a new composite hydrogel based on hydroxyethyl cellulose and medicinal stone

Wang

Kang

et al. 2011

Composites Part B: Engineering

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“…The absorption peaks of the UV-V is spectra shifted to a longer wavelength when the particle presented a superior mechanical strength, and thus exhibited properties such as easy spheroidization and aversion to deformation and fragmentation. The literature related to the fabrication of silver nanoparticles-chitosan composite films has mentioned that silver nanoparticles were uniformly dispersed and captured by the networks of amine (-NH 2 ) and hydroxyl (-OH) functional groups, 47 and thus the mechanical strength could be enhanced. 48,49 Those results were consistent Figure 3 presume that there is nearly no change in the peaks (~410 nm) at the various concentrations of NaOH, indicating that the concentration of NaOH has no significant influence on the diameters of the synthesized silver particles.…”

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confidence: 99%

Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

Wang

Yang

et al. 2015

IJN

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Silver nanoparticles have been used in various fields, and several synthesis processes have been developed. The stability and dispersion of the synthesized nanoparticles is vital. The present article describes a novel approach for one-step synthesis of silver nanoparticles–embedded chitosan particles. The proposed approach was applied to simultaneously obtain and stabilize silver nanoparticles in a chitosan polymer matrix in-situ. The diameter of the synthesized chitosan composite particles ranged from 1.7 mm to 2.5 mm, and the embedded silver nanoparticles were measured to be 15±3.3 nm. Further, the analyses of ultraviolet-visible spectroscopy, energy dispersive spectroscopy, and X-ray diffraction were employed to characterize the prepared composites. The results show that the silver nanoparticles were distributed over the surface and interior of the chitosan spheres. The fabricated spheres had macroporous property, and could be used for many applications such as fungicidal agents in the future.

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Environment friendly modified chitosan hydrogels as a matrix for adsorption of metal ions, synthesis and characterization

Cited by 83 publications

References 14 publications

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Synthesis, swelling and responsive properties of a new composite hydrogel based on hydroxyethyl cellulose and medicinal stone

Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles

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Environment friendly modified chitosan hydrogels as a matrix for adsorption of metal ions, synthesis and characterization

Cited by 83 publications

References 14 publications

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Interactions of bentonite clay in composite gels of non-ionic polymers with cationic surfactants and heavy metal ions

Synthesis, swelling and responsive properties of a new composite hydrogel based on hydroxyethyl cellulose and medicinal stone

Synthesis and anti-fungal effect of silver nanoparticles&ndash;chitosan composite particles

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Synthesis and anti-fungal effect of silver nanoparticles–chitosan composite particles