Characterization and adsorption study of biosorbents for the removal of basic cationic dye: kinetic and isotherm analysis

Characterization and adsorption study of biosorbents for the removal of basic cationic dye: kinetic and isotherm analysis

Potato peels (PP) and peanut hulls (PH) have been used as biosorbents to remove Methylene Blue (MB) from aqueous solution. By using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X ray diffraction (XRD) analysis, PP and PH have been characterized. FTIR analysi...

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Bibliographic Details
Published in:Desalination and water treatment Vol. 160; pp. 333 - 342
Main Authors: Farooq, M.U., Jalees, M.I., Iqbal, A., Zahra, N., Kiran, A.
Format: Journal Article
Language:English
Published: Elsevier Inc 01-08-2019
Subjects:
Adsorption
FTIR
Isotherms
Kinetics
Methylene Blue
SEM
Thermodynamics
XRD
Thermodynamics
Adsorption
Isotherms
FTIR
Methylene Blue
SEM
Kinetics
XRD
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Summary:Potato peels (PP) and peanut hulls (PH) have been used as biosorbents to remove Methylene Blue (MB) from aqueous solution. By using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X ray diffraction (XRD) analysis, PP and PH have been characterized. FTIR analysis confirmed the presence of carboxyl and phenolic hydroxyl groups which constitute the major adsorption sites onto PP and PH. SEM micro photographs indicated the presence of tiny pores on the adsorbent surface responsible for sorption process. XRD showed the presence of crystalline structures in both adsorbents. The effect of different parameters on adsorption was investigated, and conditions were optimized. The equilibrium and kinetics data obtained were analyzed using different models. The adsorption data confirmed second order kinetics and Langmuir Isotherm to be the best fit model for both adsorbents. Thermodynamic studies showed that the sorption process of MB was endothermic and more effective at lower temperatures. The results demonstrated that PH powder has a sufficient potential as an efficient adsorbent material for the removal of basic dyes from textile wastewater. The maximum removal efficiency of PH obtained was 98.1 % and that of PP was 92.7 %.
ISSN:1944-3986
DOI:10.5004/dwt.2019.24173