Magnetic supported activated carbon obtained from walnut shells for bisphenol-a uptake from aqueous solution

Magnetic supported activated carbon obtained from walnut shells for bisphenol-a uptake from aqueous solution

This work investigated the usability of activated carbon walnut shell (ACWS) and magnetic activated carbon walnut shell (MACWS) for Bisphenol-A (BPA) elimination from aqueous solution. Fourier-transform infrared (FT-IR) and X-ray diffraction (XRD) were used to study the chemistry of the adsorbents....

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Bibliographic Details
Published in:Applied water science Vol. 12; no. 8; pp. 1 - 16
Main Authors: Uzosike, A. O., Ofudje, E. A., Akiode, O. K., Ikenna, C. V., Adeogun, A. I., Akinyele, J. O., Idowu, M. A.
Format: Journal Article
Language:English
Published: Cham Springer International Publishing 01-08-2022
Springer Nature B.V
SpringerOpen
Subjects:
Activated carbon
Adsorbents
Adsorption
Aquatic Pollution
Aqueous solutions
Bisphenol A
Carbon
Comparative Law
Correlation coefficient
Correlation coefficients
Design optimization
Earth and Environmental Science
Earth Sciences
Entropy
Equilibrium
Fourier transforms
Hydrogeology
Industrial and Production Engineering
Infrared spectroscopy
International & Foreign Law
Isotherms
Kinetics
Nanotechnology
Original Article
Private International Law
Surface response
Thermodynamic equilibrium
Uptake
Walnut shell
Walnuts
Waste Water Technology
Wastewater
Water Industry/Water Technologies
Water Management
Water Pollution Control
X-ray diffraction
Bisphenol-A
Walnut shell
Wastewater
Activated carbon
Surface response
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Summary:This work investigated the usability of activated carbon walnut shell (ACWS) and magnetic activated carbon walnut shell (MACWS) for Bisphenol-A (BPA) elimination from aqueous solution. Fourier-transform infrared (FT-IR) and X-ray diffraction (XRD) were used to study the chemistry of the adsorbents. Batch sorption studies at different temperatures, contact time, adsorbent dosage, pH and varied Bisphenol-A concentrations were performed, while pseudo-first-order and pseudo-second-order kinetics models were deployed to investigate the kinetic data. Equilibrium parameters were computed using the Dubinin–Radushkevich, Freundlich, Temkin and Langmuir isotherms, while Box–Behnken design was used to optimize the adsorption factors. FT-IR report showed the existence of O–H, C=O, C–O and C=C stretches in both adsorbents and Fe–O in MACWS, while XRD revealed an amorphous morphology. BPA removal by ACWS and MACWS with correlation coefficient (R 2 ) > 0.9 showed that the pseudo-first-order kinetic model was the most appropriate for explaining the kinetic data. Judging from the values of the maximum adsorption capacity (115.85 and 166.67 mg/g for ACWS and MACWS, respectively), it can be inferred that the Langmuir isotherm best describes the equilibrium results. Thermodynamic investigation showed the process of Bisphenol-A uptake to be spontaneous and endothermic with entropy change (∆S o ) values of 0.033 and 0.039 kJ/mol for ACWS and MACWS, respectively. The data obtained from the kinetics, isotherm and equilibrium studies revealed that ACWS and MACWS adsorbents were effective for the treatment of Bisphenol-A.
ISSN:2190-5487
2190-5495
DOI:10.1007/s13201-022-01724-1