Adsorption characteristics of Reactive Black 5 onto chitosan beads cross-linked with epichlorohydrin

Kim, Tae‐Young; Park, Seungshik; Cho, Sung Yong

doi:10.1016/j.jiec.2012.02.006

Cited by 73 publications

(23 citation statements)

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“…The initial step indicates a great CF-dyes affinity and the convex shape suggests the formation of a monomolecular layer of the dyes on the CF surface (Giles et al, 1960). Similar equilibrium curves were obtained in the adsorption of Reactive Black 5 onto crosslinked chitosan beads (Kim et al, 2012). Furthermore, in Figure 3, it was verified that the adsorption capacities of FD&C red 2 and FD&C yellow 5 onto CF increased with the temperature decrease reaching maximum values at 298 K. Thus, in this range, the best temperature for adsorption of both dyes onto CF was 298 K. This occurred because the temperature increase causes an increase in the solubility of the dyes (Crini and Badot, 2008), so, the interaction forces between the dyes and the solvent become stronger than those between dyes and CF.…”

Section: Adsorption Equilibrium and Thermodynamicssupporting

confidence: 65%

Equilibrium Isotherms, Thermodynamics, and Kinetic Studies for the Adsorption of Food Azo Dyes onto Chitosan Films

Cadaval

Dotto

Pinto

2014

Chemical Engineering Communications

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The adsorption of FD&C red 2 and FD&C yellow 5 onto chitosan films was evaluated by equilibrium isotherms, thermodynamics and kinetic studies. The effects of temperature (298-328 K), initial dye concentration (50-300 mg L -1 ), stirring rate (50-350 rpm) and contact time (0-120 min) were investigated at pH of 2.0 and 100 mg L -1 of chitosan films. The dyes concentration was determined by spectrophotometry. Freundlich and Langmuir models were used to represent the equilibrium data. The Langmuir model was the more adequate to represent the equilibrium data (R 2 >0.99 and average relative error<2.50%) and the maximum adsorption capacities were 494.13 mg g -1 and 480.00 mg g -1 for FD&C red 2 and FD&C yellow 5, respectively, obtained at 298 K. The R L values ranged from 0.044 to 0.145. The adsorption was exothermic, spontaneous and favorable.For the FD&C red 2, 90% of saturation was attained at 120 min and the Elovich model was the more appropriate. For the FD&C yellow 5, 95% of saturation was attained at 20 min and the pseudo first-order model was the more adequate to fit the kinetic data.Chitosan films were easily separated from the liquid phase after the adsorption process, Downloaded by [Selcuk Universitesi] at 00:18 27 December 2014 ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT 2providing benefits for industrial applications, and its application range can be extended for azo dyes.

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Section: Adsorption Equilibrium and Thermodynamicssupporting

confidence: 65%

Equilibrium Isotherms, Thermodynamics, and Kinetic Studies for the Adsorption of Food Azo Dyes onto Chitosan Films

Cadaval

Dotto

Pinto

2014

Chemical Engineering Communications

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“…The chemical structure of chitosan is presented in Figure 8.1. It has been found by many researchers that the OH and NH 2 on the chitosan structure ( Figure 8.1) are the main functional groups responsible for dye binding [59][60][61][62][63][64][65]. The use of chitosan for SODs removal from aqueous solutions is based mainly on three factors: First, due to the fact that the chitosan-based [9] and [58]).…”

Section: Chitosanmentioning

confidence: 99%

Biosorption of Organic Dyes: Research Opportunities and Challenges

Dotto

Sharma

Pinto

2015

Green Chemistry for Dyes Removal From Wastewater

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“…For example, Mahaninia and Wilson reported improved adsorption of phosphate anions from aqueous solution upon bead formation and/or cross-linking of chitosan but reiterated that the technique was limited by the kinetics of adsorbate diffusion into the bead microstructure [11]. As well, Kim et al reported the low uptake of reactive black (RB) dye using similar bead systems [12]. Bertolino et al reported that chitosan-based nanocomposites possess excellent thermal properties [13] for packaging, tissue engineering, and pharmaceutical applications [14], whereas Lissuzo et al reported on the utility of chitosan-based nanocomposites for drug delivery [15].…”

Section: Introductionmentioning

confidence: 99%

Animal Biopolymer-Plant Biomass Composites: Synergism and Improved Sorption Efficiency

2020

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Pelletized biomaterial composites that contain chitosan (C) and torrefied wheat straw (S) at variable weight composition (C:S) were prepared using a facile blending process. The fractional content of the wheat straw was studied to elucidate the role of biomass on the pelletized product and effects of S-content on the physicochemical properties relevant to adsorption phenomena. Chitosan pellets (with and without S) were characterized by spectroscopic (FT-IR and 13C NMR) and thermal (TGA and DSC) techniques to provide support for their respective C:S composition. Confocal microscopy using fluorescein (FL) as a dye probe revealed the presence and an increase in the accessibility of the active sites for the composite pellets according to the S-content (wt %). Equilibrium and kinetic sorption studies using FL and reactive black (RB) dyes revealed an incremental adsorption affinity of the pellets with anionic dyes in variable charge states (FL and RB). The trend for dye adsorption parallels the incremental S-content (wt %) in the composite pellets. This study reports a first-example of a low-cost, facile, and sustainable approach for the valorization of straw and chitosan suitable for sorption-based applications in aqueous media.

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Adsorption characteristics of Reactive Black 5 onto chitosan beads cross-linked with epichlorohydrin

Cited by 73 publications

References 23 publications

Equilibrium Isotherms, Thermodynamics, and Kinetic Studies for the Adsorption of Food Azo Dyes onto Chitosan Films

Equilibrium Isotherms, Thermodynamics, and Kinetic Studies for the Adsorption of Food Azo Dyes onto Chitosan Films

Biosorption of Organic Dyes: Research Opportunities and Challenges

Animal Biopolymer-Plant Biomass Composites: Synergism and Improved Sorption Efficiency

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