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The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells

In this study, the potential for pulverized raw macadamia nut shell (MNS) for the sequestration of methylene blue from aqueous media was assessed. The sorbent was characterized using scanning electron microscopy for surface morphology, functional group analysis was performed with a Fourier-transform...

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Autores principales: Edokpayi, Joshua N., Alayande, Samson O., Adetoro, Ahmed, Odiyo, John O.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277068/
https://www.ncbi.nlm.nih.gov/pubmed/32566358
http://dx.doi.org/10.1155/2020/8840666
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author Edokpayi, Joshua N.
Alayande, Samson O.
Adetoro, Ahmed
Odiyo, John O.
author_facet Edokpayi, Joshua N.
Alayande, Samson O.
Adetoro, Ahmed
Odiyo, John O.
author_sort Edokpayi, Joshua N.
collection PubMed
description In this study, the potential for pulverized raw macadamia nut shell (MNS) for the sequestration of methylene blue from aqueous media was assessed. The sorbent was characterized using scanning electron microscopy for surface morphology, functional group analysis was performed with a Fourier-transform infrared spectrometer (FT-IR), and Brunauer–Emmett–Teller (BET) isotherm was used for surface area elucidation. The effects of contact time, sorbent dosage, particle size, pH, and change in a solution matrix were studied. Equilibrium data were fitted using Temkin, Langmuir, and Freundlich adsorption isotherm models. The sorption kinetics was studied using the Lagergren pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The feasibility of the study was established from the thermodynamic studies. A surface area of 2.763 m(2)/g was obtained. The equilibrium and kinetics of sorption was best described by the Langmuir and the pseudo-second-order models, respectively. The sorption process was spontaneous (−ΔG(0)=28.72 − 31.77 kJ/mol) and endothermic in nature (ΔH(0)=17.45 kJ/mol). The positive value of ΔS(0) (0.15 kJ/molK) implies increased randomness of the sorbate molecules at the surface of the sorbent. This study presents sustainable management of wastewater using MNS as a potential low-cost sorbent for dye decontamination from aqueous solution.
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spelling pubmed-72770682020-06-19 The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells Edokpayi, Joshua N. Alayande, Samson O. Adetoro, Ahmed Odiyo, John O. J Anal Methods Chem Research Article In this study, the potential for pulverized raw macadamia nut shell (MNS) for the sequestration of methylene blue from aqueous media was assessed. The sorbent was characterized using scanning electron microscopy for surface morphology, functional group analysis was performed with a Fourier-transform infrared spectrometer (FT-IR), and Brunauer–Emmett–Teller (BET) isotherm was used for surface area elucidation. The effects of contact time, sorbent dosage, particle size, pH, and change in a solution matrix were studied. Equilibrium data were fitted using Temkin, Langmuir, and Freundlich adsorption isotherm models. The sorption kinetics was studied using the Lagergren pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion models. The feasibility of the study was established from the thermodynamic studies. A surface area of 2.763 m(2)/g was obtained. The equilibrium and kinetics of sorption was best described by the Langmuir and the pseudo-second-order models, respectively. The sorption process was spontaneous (−ΔG(0)=28.72 − 31.77 kJ/mol) and endothermic in nature (ΔH(0)=17.45 kJ/mol). The positive value of ΔS(0) (0.15 kJ/molK) implies increased randomness of the sorbate molecules at the surface of the sorbent. This study presents sustainable management of wastewater using MNS as a potential low-cost sorbent for dye decontamination from aqueous solution. Hindawi 2020-05-30 /pmc/articles/PMC7277068/ /pubmed/32566358 http://dx.doi.org/10.1155/2020/8840666 Text en Copyright © 2020 Joshua N. Edokpayi et al. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Edokpayi, Joshua N.
Alayande, Samson O.
Adetoro, Ahmed
Odiyo, John O.
The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title_full The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title_fullStr The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title_full_unstemmed The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title_short The Equilibrium, Kinetics, and Thermodynamics Studies of the Sorption of Methylene Blue from Aqueous Solution Using Pulverized Raw Macadamia Nut Shells
title_sort equilibrium, kinetics, and thermodynamics studies of the sorption of methylene blue from aqueous solution using pulverized raw macadamia nut shells
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7277068/
https://www.ncbi.nlm.nih.gov/pubmed/32566358
http://dx.doi.org/10.1155/2020/8840666
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