Removal of anionic dyes from aqueous solutions by adsorption of chitosan-based semi-IPN hydrogel composites

Zhao, Shenghui; Zhou, Feng; Li, Liyan; Cao, Meng-Jie; Zuo, Dunwen; Liu, Hongtao

doi:10.1016/j.compositesb.2012.01.015

Cited by 165 publications

(54 citation statements)

References 34 publications

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“…However, the removal ratio decreased with increasing MB concentration. This result may be due to an inadequate number of adsorption sites as well as competitive adsorption of MB (Zhao et al 2012). Interestingly, the additive NaLS contributes positively to the adsorption ability, e.g., Gel-3, with a NaLS/AHC mass ratio of 1/3, has the maximum adsorption capacity; this result corresponds with the adsorption kinetics experiment.…”

Section: Effect Of Temperature and Initial Concentration On Adsorptionsupporting

confidence: 60%

A Lignin-containing Hemicellulose-based Hydrogel and its Adsorption Behavior

2016

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A lignin-containing hemicellulose-based hydrogel was prepared from acylated hemicellulose and acrylic acid by free radical polymerization reaction, initiated by ammonium persulfate and N,N,N',N'-tetramethylethane-1,2-diamine in the presence of sodium lignosulfonate. Sodium lignosulfonate present in the hydrogel, when grafted by poly(acrylic acid), was identified as an interpenetrating polymer network form, while that not grafted by poly(acrylic acid) was identified as a semi-interpenetrating polymer network form. Both the swelling ratio and the adsorption capacity were dependent on sodium lignosulfonate dosage. The adsorption behavior of the hydrogel was evaluated. The maximum adsorption capacity towards methylene blue, a model dye, was 2691 mg/g. The adsorption kinetics and isotherm were well fitted by pseudo-second-order kinetics and Langmuir isotherm model, respectively. The hydrogel reveals an approximately 80% adsorption efficiency after fourth recycle. This hydrogel is a promising material for dye wastewater treatment.

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Section: Effect Of Temperature and Initial Concentration On Adsorptionsupporting

confidence: 60%

A Lignin-containing Hemicellulose-based Hydrogel and its Adsorption Behavior

2016

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“…Among these chitosan derivatives, carboxymethyl chitosan (CC) is an amphoteric ether derivative containing active carboxyl (-COOH), hydroxyl (-OH), and amino (-NH2) groups in a molecule [23]. The immobilization of CC on rigid inorganic materials through a crosslinking reaction with carboxyl groups exhibited improved mechanical properties [24]. Adsorption can also be enhanced with carboxyl groups [25].…”

Section: Introductionmentioning

confidence: 98%

Carboxymethyl chitosan-modified magnetic-cored dendrimer as an amphoteric adsorbent

Kim

Jang²,

Park

2016

Journal of Hazardous Materials

104

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“…An isosbestic point at 469 nm was also reported [32]. Measurement of MO concentration was also undertaken at the wavelength of 464 nm [17,33] and at 505 nm [34]. To minimize the pH effect on MO concentration determination, three wavelengths at 352, 465, and 470 nm, corresponding to three of the reported isosbestic points [30][31][32] were simultaneously used.…”

Section: Methods Of Analysesmentioning

confidence: 99%