Abstract
The bagasse fly ash (BFA) has been altered to zeolitic materials by hydrothermal (CZBFA) and fusion (FZBFA) methods. The dominant zeolitic phases identified by powder X-ray diffraction (PXRD) are phillipsite and analcime. The X-ray fluorescence (XRF), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) techniques were used for the determination of chemical composition, functional groups, and morphology of synthesized materials. The phenol sorption capacities of prepared zeolitic and virgin material were determined by batch and column modes. The Langmuir, Freundlich, Dubinin–Radushkevich, and Temkin isotherms were estimated for the sorption nature and efficiency of sorbents. The sorption kinetics is better reflected by the pseudosecond-order model, and thermodynamics parameters exhibited the specified endothermic nature of sorption. The overall sorption was approximated well by film diffusion and pore diffusion simultaneously. The regeneration of sorbents was carried out with HCl, NaOH, and sodium dodecyl sulfate (SDS) detergent. The breakthrough curves capacities obtained by column studies exhibited a lower sorption capacity than the batch method. FZBFA showed the highest capacity of phenol sequestration. The improved capacities of modified zeolitic material may provide a cheap alternative for phenol bearing wastewater.
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