Design of a new integrated chitosan-PAMAM dendrimer biosorbent for heavy metals removing and study of its adsorption kinetics and thermodynamics

Zarghami, Zabihullah; Akbari, Ahmad; Latifi, Ali Mohammad; Amani, Mohammad Ali

doi:10.1016/j.biortech.2016.01.052

Cited by 149 publications

(42 citation statements)

References 30 publications

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“…The Langmuir isotherm equation is the most commonly used for monolayer adsorption on the surface with a finite number of identical sites. The linear form of the Langmuir isotherm is as follows:

\frac{C_{e}}{q_{e}} = \frac{1}{{italicbq}_{m}} + \frac{C_{e}}{q_{m}}

where q e is an equilibrium adsorption capacity (mg g ‐1 ), C e is an equilibrium concentration of adsorbate in solution after adsorption (mg L ‐1 ), q m is the maximum adsorption capacity at saturation of monolayer (mg g ‐1 ), and b is the Langmuir constant (L mg ‐1 ). The Freundlich isotherm is the most important multilayer adsorption isotherm for heterogeneous surfaces.…”

Section: Resultsmentioning

confidence: 99%

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Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Panchan

Niamnuy

Dittanet

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND An alternative carboxymethyl cellulose‐based biosorbent hydrogel was synthesized by grafting 2‐acrylamido‐2‐methylpropanesulfonic acid (AMPS) onto the prepared carboxymethyl cellulose backbone via microwave heating. Response surface methodology was employed to optimize the hydrogel synthesis condition for maximum gel content with respect to AMPS dose, N,N′‐methylene‐bis‐acrylamide dose, and microwave exposure time. The prepared gels were then characterized and evaluated in terms of their heavy metal ions adsorption performance and reusability. RESULTS The optimum synthesis condition yielded the maximum gel content and maximum equilibrium swelling of 96.33% and 2819 ± 15%, respectively. The Langmuir model fitted the experimental isotherm data well, with maximum adsorption capacity of 86.21, 102.04 and 33.56 mg g‐1 for Cu2+, Pb2+ and Fe3+, respectively. Microwave heating was clearly noted to result in hydrogel of higher porosity and could shorten the synthesis time by 88.33%; the gel content was 7.46% higher compared with that obtained via conventional heating. CONCLUSION Microwave‐assisted heating is a feasible alternative and an efficient technique for CMC‐g‐AMPS hydrogel synthesis. The optimized CMC‐g‐AMPS hydrogel exhibited good performance for Cu2+, Pb2+ and Fe3+ ions removal and was satisfactorily reused, thus contributing to the alleviation of environmental problems caused by discarded rice straw and water contaminated with heavy metal ions. © 2017 Society of Chemical Industry

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“…The Langmuir isotherm equation is the most commonly used for monolayer adsorption on the surface with a finite number of identical sites. The linear form of the Langmuir isotherm is as follows:

\frac{C_{e}}{q_{e}} = \frac{1}{{italicbq}_{m}} + \frac{C_{e}}{q_{m}}

Section: Resultsmentioning

confidence: 99%

“…The Freundlich isotherm is the most important multilayer adsorption isotherm for heterogeneous surfaces. The linear form of the Freundlich isotherm is expressed as follows :

{log q}_{e} = {logK}_{F} + \frac{1}{n} {logC}_{e}

where K F ((mg g ‐1 )(L mg ‐1 ) 1/n ) and n (dimensionless) are the constants of the Freundlich model.…”

Section: Resultsmentioning

confidence: 99%

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Panchan

Niamnuy

Dittanet

et al. 2017

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

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“…Nowadays, many kinds of inorganic nanomaterials are being widely reported that can be directly used for versatile research. [29][30][31][32][33][34][35][36] Dendritic structures combined with metal nanoparticles (MNPs) have been suggested for rapid, easy, and economical separation of target molecules from large volumes of toxic waste. As most common adsorbents, polymer microspheres, metal oxides, mesoporous nanostructures, and activated carbons have been synthesized to study their adsorption properties due to their large surface area and high adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Galangash

Ghavidast

Bozorgpanah

2018

J Chinese Chemical Soc

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The adsorption of the dyes Acid Red 114 and Reactive Black 5 in aqueous solutions on polyhydroxyl dendrimer magnetic nanoparticles (Fe3O4@SiO2‐TRIS) was studied in a batch system. The Fe3O4@SiO2‐TRIS NPs were characterized by Fourier transform infrared spectroscopy, X‐ray diffraction, and transmission electron microscopy. Experiments were performed under different conditions such as the initial dye concentration, adsorbent dose, and pH. The pseudo‐second‐order model provided a very good fit for the two anionic dyes. The Langmuir and Freundlich adsorption models were used to describe the equilibrium isotherms at different temperatures, and the former agreed very well with the experimental data. However, the adsorption capacity of Fe3O4@SiO2‐TRIS NPs was reduced during surface modification, which could be due to the dye occupying the binding sites of the dendrimer. Thermodynamic parameters, namely the change in free energy (ΔG0), enthalpy (ΔH0), and entropy (ΔS0), were also determined.

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“…This blend, in turn, has several functional groups to capture anionic and cationic dyes. There are several studies in the literature regarding the preparation, characterization, and application of chitosan blends; however in this work, the development and application of chitosan/ Spirulina bio‐blends in film form are reported for the first time.…”

Section: Introductionmentioning

confidence: 99%

Development of chitosan/Spirulina bio‐blend films and its biosorption potential for dyes

Silva

Farias

Gründmann

et al. 2016

J of Applied Polymer Sci

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Chitosan/Spirulina bio‐blends (CSBB) in films form were developed to be an alternative/renewable biosorbent, able to remove anionic and cationic dyes from aqueous solutions. CSBB potential as biosorbent was investigated for cationic dye Methylene Blue (MB), and anionic dyes Tartrazine Yellow (TY) and Reactive Black 5 (RB5). Chitosan and Spirulina samples were obtained and characterized, and CSBB films were prepared with different chitosan/Spirulina ratios. The CSBB films characteristics, as, mechanical properties, thermal profile, crystallinity, functional groups, morphology, and biosorption potential were strongly dependent of chitosan/Spirulina ratio. CSBB films preserved its mechanical structures at pH from 4.0 to 8.0. The biosorption capacities were 120, 110, and 100 mg g−1 for RB5, TY, and MB, respectively. The increase of chitosan amount favored the TY and RB5 biosorption; however, the increase of Spirulina amount favored the MB biosorption. Thus, the CSBB in film form is a renewable biosorbent suitable to remove anionic and cationic dyes from aqueous solutions. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44580.

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Design of a new integrated chitosan-PAMAM dendrimer biosorbent for heavy metals removing and study of its adsorption kinetics and thermodynamics

Cited by 149 publications

References 30 publications

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Optimization of synthesis condition for carboxymethyl cellulose‐based hydrogel from rice straw by microwave‐assisted method and its application in heavy metal ions removal

Adsorption of acid red 114 and reactive black 5 in aqueous solutions on dendrimer‐conjugated magnetic nanoparticles

Development of chitosan/Spirulina bio‐blend films and its biosorption potential for dyes

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