Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies

This study evaluated the feasibility of utilizing agricultural waste dragon fruit (Hylocereus undatus) peels (DFP) as natural low-cost adsorbent to remove cationic dye methylene blue (MB) from aqueous solution. The physicochemical compositions of the DFP were characterized using CHNS-O analysis, X-r...

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Published in:Desalination and Water Treatment
Main Author: Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
Format: Article
Language:English
Published: Desalination Publications 2018
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056377270&doi=10.5004%2fdwt.2018.21976&partnerID=40&md5=93e68903109d422f86d2ad0b50a444f3
id 2-s2.0-85056377270
spelling 2-s2.0-85056377270
Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
2018
Desalination and Water Treatment
109

10.5004/dwt.2018.21976
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056377270&doi=10.5004%2fdwt.2018.21976&partnerID=40&md5=93e68903109d422f86d2ad0b50a444f3
This study evaluated the feasibility of utilizing agricultural waste dragon fruit (Hylocereus undatus) peels (DFP) as natural low-cost adsorbent to remove cationic dye methylene blue (MB) from aqueous solution. The physicochemical compositions of the DFP were characterized using CHNS-O analysis, X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and point of zero charge (pHpzc) method. Batch mode adsorption studies were carried out by varying the operational parameters, namely adsorbent dosage (0.02–0.20 g), pH (3–10), initial MB concentration (50–400 mg/L) and contact time (0–120 min). The adsorption kinetic data showed that the process was best described by the pseudo-second-order kinetic model. The equilibrium data were discovered to better obeyed the Langmuir isotherm model than the Freundlich with maximum monolayer adsorption capacity, qm, of the DFP towards MB was found to be as high as 192.31 mg/g. The thermodynamic adsorption parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°) and standard free energy (ΔG°) advocated that the adsorption of MB by DFP was endothermic and spontaneous under the tested conditions. These findings clearly indicated the viability of DFP as an effective adsorbent for elimination of MB from aqueous solution. © 2018 Desalination Publications. All rights reserved.
Desalination Publications
19443994
English
Article

author Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
spellingShingle Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
author_facet Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
author_sort Jawad A.H.; Kadhum A.M.; Ngoh Y.S.
title Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
title_short Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
title_full Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
title_fullStr Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
title_full_unstemmed Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
title_sort Applicability of dragon fruit (Hylocereus polyrhizus) peels as low-cost biosorbent for adsorption of methylene blue from aqueous solution: Kinetics, equilibrium and thermodynamics studies
publishDate 2018
container_title Desalination and Water Treatment
container_volume 109
container_issue
doi_str_mv 10.5004/dwt.2018.21976
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85056377270&doi=10.5004%2fdwt.2018.21976&partnerID=40&md5=93e68903109d422f86d2ad0b50a444f3
description This study evaluated the feasibility of utilizing agricultural waste dragon fruit (Hylocereus undatus) peels (DFP) as natural low-cost adsorbent to remove cationic dye methylene blue (MB) from aqueous solution. The physicochemical compositions of the DFP were characterized using CHNS-O analysis, X-ray diffraction, scanning electron microscopy, Fourier transform infrared spectroscopy and point of zero charge (pHpzc) method. Batch mode adsorption studies were carried out by varying the operational parameters, namely adsorbent dosage (0.02–0.20 g), pH (3–10), initial MB concentration (50–400 mg/L) and contact time (0–120 min). The adsorption kinetic data showed that the process was best described by the pseudo-second-order kinetic model. The equilibrium data were discovered to better obeyed the Langmuir isotherm model than the Freundlich with maximum monolayer adsorption capacity, qm, of the DFP towards MB was found to be as high as 192.31 mg/g. The thermodynamic adsorption parameters such as standard enthalpy (ΔH°), standard entropy (ΔS°) and standard free energy (ΔG°) advocated that the adsorption of MB by DFP was endothermic and spontaneous under the tested conditions. These findings clearly indicated the viability of DFP as an effective adsorbent for elimination of MB from aqueous solution. © 2018 Desalination Publications. All rights reserved.
publisher Desalination Publications
issn 19443994
language English
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