<i>Stipa tenacessima</i> L cationized fibers as adsorbent of anionic dyes

Ghali, Amel El; Baouab, Mohamed Hassen V.; Roudesli, Mohamed Sadok

doi:10.1002/app.31133

Cited by 15 publications

(7 citation statements)

References 27 publications

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“…Cellulose derivatives have been particularly investigated during the treatment of effluents. [33][34][35] In a previous work, Baouab et al, 7 have chemically modified the cotton fiber by ethylene diamine and then the ethylene diamine-grafted groups immobilizes Cu(II) ions was tested for the adsorption of Calma and AB25 as ligands in the metal-coordinating process. The objectives of this article concern the description, for the first time, of the feasibility and the characterization of a ternary complex formation between the two model ligands (AB25 and Calma), Cu (II) ions, and crosslinked chitosan microspheres using a batch process under several experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

[Dye molecules/copper(II)/macroporous glutaraldehyde‐chitosan] microspheres complex: Surface characterization, kinetic, and thermodynamic investigations

Jabli

Baouab

Sintès‐Zydowicz

et al. 2011

J of Applied Polymer Sci

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Chitosan microspheres loaded Cu(II) were prepared using a precipitation method and heterogeneously crosslinked with glutaraldehyde. The abilities of the binary [Cu(II)/Glut-chitosan] system for binding two acid dyes, that is, Acid blue 25 (AB25) and Calmagite (Calma) were investigated. Sorption experiments were performed using a batch process at 25 C and indicate pH dependence. Evidence for the modification of the raw chitosan polymer was provided by Fourier transform infra red spectral study, thermogravimetry, differential thermogravimetry, differential scanning calorimetry, and scanning electron microscopy analysis. Data gleaned from the thermal analyses, showed that the modification of the polymer decreases the thermal stability of the prepared materials with respect to that of the native one. The effecting factors during dye adsorption have been also studied. Thermodynamic and kinetic experiments were undertaken to assess the capacity and the rate of dyes removal on the surface of [Cu(II)/Glut-chitosan]. Experimental data were mathematically described using various kinetic models. The pseudo second-order equation was shown to fit the adsorption kinetics. The interpretation of the equilibrium sorption data complies well with the Freundlich adsorption model. Thermodynamic results indicate that the adsorption follows an exothermic process.

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Section: Introductionmentioning

confidence: 99%

[Dye molecules/copper(II)/macroporous glutaraldehyde‐chitosan] microspheres complex: Surface characterization, kinetic, and thermodynamic investigations

Jabli

Baouab

Sintès‐Zydowicz

et al. 2011

J of Applied Polymer Sci

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“…Plot of the standard enthalpies versus the standard entropies for the binding equilibria from Ramesh (solid line) and Gilli (dashed line). Points correspond to data calculated from refs and − . …”

Section: Results and Discussionmentioning

confidence: 99%

Adsorption of the Prototype Anionic Anthraquinone, Acid Blue 25, on a Modified Banana Peel: Comparison with Equilibrium and Kinetic Ligand–Receptor Biochemical Data

Guiso

Biesuz

Vilariño

et al. 2014

Ind. Eng. Chem. Res.

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The adsorptive behavior of dye Acid Blue 25 (AB25) on the banana peel is studied with two objectives in view. First, from an environmental point of view, AB25 is considered a model of the anionic dyes, and the banana peel is a quite abundant agricultural waste which can be reused as adsorbent. Second, and on account of the recent research on possible applications of 1-aminoanthraquinone derivatives in pharmacological research, physicochemical studies on the interaction of AB25 anionic prototype and related dyes with different kinds of biomass surfaces can be useful in the basic modeling studies on the antagonist-P2 receptor interactions carried out by different researchers with 1-aminoanthraquinone dyes. A careful analysis of the acid–base properties of the biomass provides the number of weak acid groups, that was found to be 0.288(7) mmol g–1 for modified banana peel in 0.1 M KNO3. An uptake capacity value of 0.215(13) mmol g–1 is obtained when data from batch experiments are fitted to sorption isotherms. Specific surface is calculated and compared with other biosurfaces. Kinetics of the process allows calculating an intraparticle diffusion coefficient, D i, of 0.331(1) × 10–13 m2 s–1. Desorption and column experiments demonstrate the feasibility for an application for AB25 recovery in remediation. Finally, a comparison with thermodynamic and kinetic data from receptor–ligand studies is also carried out.

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“…Alfa fibers have a heterogeneous structure consisting mainly of cellulose (43.9−50%), lignin (17.71−24%), hemicellulose (22.15− 28%), and 5% wax . Consequently, these fibers are highly anisotropic as are most natural fibers.…”

Section: Methodsmentioning

confidence: 99%

Damage analysis of composites reinforced with Alfa fibers: Viscoelastic behavior and debonding at the fiber/matrix interface

Khaldi

Vivet

Bourmaud

et al. 2016

J of Applied Polymer Sci

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In this article, we first review state‐of‐the‐art experimental techniques and measurements to characterize the mechanical properties of anisotropic vegetal alfa fibers, epoxy‐resin, and the behavior of the interphase between the matrix and alfa fibers. Second, we conduct experimental tests to determine the mechanical properties of fibers, resin, and the interphase. Third, we carry out a series of finite element simulations to predict damage initiation and to estimate crack propagation in alfa‐fiber/epoxy‐resin (AFER) composites. Different tests to determine the longitudinal Young's modulus of alfa fibers and epoxy resin as well as nanoindentation tests to obtain the transverse stiffness of the fibers are presented. Experimental results from the characterization are introduced in a micromechanical model to estimate, using the concept of the energy release rate (ERR), the matrix crack, and its interaction with interfacial debonding. The wettability problems in the preparation of vegetable composites and their effect on fiber‐matrix interfacial debonding are also addressed. The analysis of the damage behavior of AFER composites demonstrates that under load transverse to the fiber axis, a crack initiated in the matrix is propagated perpendicular to the direction of the load. Near the interface, the ERR decreases and this energy is higher in the presence of interfacial debonding areas generated by problems of fiber wettability. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43760.

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Stipa tenacessima L cationized fibers as adsorbent of anionic dyes

Cited by 15 publications

References 27 publications

[Dye molecules/copper(II)/macroporous glutaraldehyde‐chitosan] microspheres complex: Surface characterization, kinetic, and thermodynamic investigations

[Dye molecules/copper(II)/macroporous glutaraldehyde‐chitosan] microspheres complex: Surface characterization, kinetic, and thermodynamic investigations

Adsorption of the Prototype Anionic Anthraquinone, Acid Blue 25, on a Modified Banana Peel: Comparison with Equilibrium and Kinetic Ligand–Receptor Biochemical Data

Damage analysis of composites reinforced with Alfa fibers: Viscoelastic behavior and debonding at the fiber/matrix interface

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