Wastewater treatment by new high-performance activated carbon from Semecarpus Anacardium and Quercus Infectoria nutshells: applications- kinetic and equilibrium studies

Articles in Press

Document Type : Research Article

Authors

1 Department of Chemistry, Faculty of Renewable Energies, Urmia University of Technology, Urmia, Iran

2 Chemical Engineering Department, Urmia University of Technology, P.O.Box 57155-419, Urmia, Iran.

3 Polymerization Engineering Department, Iran Polymer and Petrochemical Institute (IPPI), Tehran, Iran

Abstract

This study utilized Semecarpus Anacardium (SA) and Quercus Infectoria (QI) nutshells as raw materials to manufacture activated carbon (AC) that is both inexpensive and possesses a large surface area. All materials were examined using Fourier transform infrared spectroscopy (FTIR), Scanning Electron Microscopy (SEM/EDX), X-ray powder diffraction (XRD), and Brunauer, Emmett, and Teller (BET) surface area methods. The effective synthesis of AC was validated by surface functional groups in FTIR spectra and XRD diffractograms, which showed a broad peak in the region of 2θ=15-28° and a faint and wide peak in the range of 2θ=40-48°. The BET results indicated that the AC synthesized from SA and activated with KOH (ACSAK) had the greatest surface area (717 m2/g-1), the most enormous pore volume (0.286 cm3/g-1), and mean pore diameters (<2nm). The synthesized AC in this research can be classified into micro-pore adsorbents entirely. Finally, the resulting ACSAK was applied to Methylene Blue (MB) adsorption. Adsorption studies demonstrate that the Langmuir isotherm (R2=0.996) matches somewhat more accurately than the Freundlich and Temkin isotherms. Our adsorption kinetics findings show that the pseudo-second-order model has the maximum fitness and accuracy on MB adsorption data in AC (R2 = 0.999).

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Iranian Journal of Chemistry and Chemical Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 March 2024

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