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Preparation of new MOF-808/chitosan composite for Cr(VI) adsorption from aqueous solution: Experimental and DFT study.
Carbohydr Polym. 2022 Jul 15; 288:119383.CP

Abstract

In this study, a series of Zirconium-based MOF and chitosan composites (MOF-808/chitosan) were synthesized as efficient adsorbent for Cr(VI) ions elimination from aqueous solution. MOF-808/chitosan structure and morphology was characterized by FE-SEM, EDX, XRD, BET, zeta potential analysis, FT-IR, XPS techniques. The kinetic studies ascertained that Cr(VI) adsorption over MOF-808/chitosan followed pseudo-second-order kinetic model. The adsorption isotherms fitted the Langmuir isotherm model, implying on homogeneously adsorption of Cr(VI) on the surface of MOF-808/chitosan. According to the Langmuir model, the maximum capacity was obtained to be 320.0 mg/g at pH 5. Thermodynamic investigation proposed spontaneous (ΔG° < 0), disordered (ΔS° > 0) and endothermic (ΔH° > 0) for adsorption process. Besides, MOF-808/chitosan displayed an appropriate reusability for the elimination of Cr(VI) ions from their aqueous solutions for six successive cycles. DFT study of the adsorption process displayed and confirmed the role of hydrogen bonding and electrostatic attraction simultaneously.

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Publisher Full Text (DOI)

Authors+Show Affiliations

Valadi FM
Department of Chemistry, Sharif University of Technology, Azadi Avenue, Tehran, Iran.
Shahsavari S
Department of Chemistry, Sharif University of Technology, Azadi Avenue, Tehran, Iran; Nanoclub Elites Association, Tehran, Iran.
Akbarzadeh E
Department of Chemistry, Sharif University of Technology, Azadi Avenue, Tehran, Iran. Electronic address: elhamakbarzadeh64@gmail.com.
Gholami MR
Department of Chemistry, Sharif University of Technology, Azadi Avenue, Tehran, Iran. Electronic address: gholami@sharif.ir.

MeSH

AdsorptionChitosanChromiumHydrogen-Ion ConcentrationKineticsSpectroscopy, Fourier Transform InfraredThermodynamicsWaterWater Pollutants, ChemicalWater Purification

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35450645

Citation

Valadi, Farshad Mirzaee, et al. "Preparation of New MOF-808/chitosan Composite for Cr(VI) Adsorption From Aqueous Solution: Experimental and DFT Study." Carbohydrate Polymers, vol. 288, 2022, p. 119383.
Valadi FM, Shahsavari S, Akbarzadeh E, et al. Preparation of new MOF-808/chitosan composite for Cr(VI) adsorption from aqueous solution: Experimental and DFT study. Carbohydr Polym. 2022;288:119383.
Valadi, F. M., Shahsavari, S., Akbarzadeh, E., & Gholami, M. R. (2022). Preparation of new MOF-808/chitosan composite for Cr(VI) adsorption from aqueous solution: Experimental and DFT study. Carbohydrate Polymers, 288, 119383. https://doi.org/10.1016/j.carbpol.2022.119383
Valadi FM, et al. Preparation of New MOF-808/chitosan Composite for Cr(VI) Adsorption From Aqueous Solution: Experimental and DFT Study. Carbohydr Polym. 2022 Jul 15;288:119383. PubMed PMID: 35450645.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Preparation of new MOF-808/chitosan composite for Cr(VI) adsorption from aqueous solution: Experimental and DFT study. AU - Valadi,Farshad Mirzaee, AU - Shahsavari,Shayan, AU - Akbarzadeh,Elham, AU - Gholami,Mohammad Reza, Y1 - 2022/03/22/ PY - 2021/11/05/received PY - 2022/03/16/revised PY - 2022/03/17/accepted PY - 2022/4/22/entrez PY - 2022/4/23/pubmed PY - 2022/4/26/medline KW - Adsorption KW - Chitosan KW - Cr(VI) KW - DFT KW - MOF-808 SP - 119383 EP - 119383 JF - Carbohydrate polymers JO - Carbohydr Polym VL - 288 N2 - In this study, a series of Zirconium-based MOF and chitosan composites (MOF-808/chitosan) were synthesized as efficient adsorbent for Cr(VI) ions elimination from aqueous solution. MOF-808/chitosan structure and morphology was characterized by FE-SEM, EDX, XRD, BET, zeta potential analysis, FT-IR, XPS techniques. The kinetic studies ascertained that Cr(VI) adsorption over MOF-808/chitosan followed pseudo-second-order kinetic model. The adsorption isotherms fitted the Langmuir isotherm model, implying on homogeneously adsorption of Cr(VI) on the surface of MOF-808/chitosan. According to the Langmuir model, the maximum capacity was obtained to be 320.0 mg/g at pH 5. Thermodynamic investigation proposed spontaneous (ΔG° < 0), disordered (ΔS° > 0) and endothermic (ΔH° > 0) for adsorption process. Besides, MOF-808/chitosan displayed an appropriate reusability for the elimination of Cr(VI) ions from their aqueous solutions for six successive cycles. DFT study of the adsorption process displayed and confirmed the role of hydrogen bonding and electrostatic attraction simultaneously. SN - 1879-1344 UR - https://www.unboundmedicine.com/medline/citation/35450645/Preparation_of_new_MOF_808/chitosan_composite_for_Cr_VI__adsorption_from_aqueous_solution:_Experimental_and_DFT_study_ DB - PRIME DP - Unbound Medicine ER -