Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch

A low-cost, easily obtained and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods such as using activated carbon for removing dyes from wastewater. This study investigated the use of palm oil empty fruit bunch (POEFB) fibre, an agricultural waste,...

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Main Author:	Tahir, Norini
Format:	Thesis
Language:	English
Published:	2011
Subjects:	Q Science (General)
Online Access:	http://eprints.utm.my/id/eprint/33341/1/NoriniTahirMFS2011.pdf
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spelling	my-utm-ep.333412018-05-27T08:05:45Z Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch 2011-05 Tahir, Norini Q Science (General) A low-cost, easily obtained and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods such as using activated carbon for removing dyes from wastewater. This study investigated the use of palm oil empty fruit bunch (POEFB) fibre, an agricultural waste, for the removal of Acid Orange 51 (AO51) dye from aqueous solutions. Batch mode experiments were conducted at room temperature (28 ± 2)°C to study the effect of particle size (75 µm, 250 µm and 2 mm), initial dye concentrations (10-200 mg/L) and temperature (30-50 °C) of adsorption characteristics of AO51 dye onto treated and non-treated POEFB fibre. It was found that the adsorption removal of AO51 dye by treated POEFB fibre was ~5%, which was far lower than that of ~60% on the untreated POEFB fibre. The equilibrium adsorption isotherms and kinetics were further investigated for untreated POEFB fibre. The adsorption equilibrium data were analyzed by Langmuir, Freundlich and Temkin isotherm models. The results indicated that the equilibrium sorption fitted well with the Freundlich isotherm, displaying higher regression coefficient, R2 value. Adsorption kinetic data were modeled using the pseudo-first-order, pseudo-second-order and intraparticle diffusion models. It was shown that pseudo-second-order kinetic model could best describe the adsorption kinetics. Isotherms have also been used to obtain the thermodynamic parameters, namely enthalpy and entropy of adsorption. The result showed negative value for both enthalpy (-13.91 kJ/mol) and entropy (-38.43 J/mol K) changes. Based on the isotherm studies, it can be concluded that the adsorption of AO51 dye onto untreated POEFB is favorable via physical adsorption. Thermodynamically, the final adsorbed state of the dye molecule is lower in energy compared to initial state. These results indicate the potential of using POEFB fibre as a low-cost adsorbent material for adsorption of the AO51 dye from aqueous solutions. 2011-05 Thesis http://eprints.utm.my/id/eprint/33341/ http://eprints.utm.my/id/eprint/33341/1/NoriniTahirMFS2011.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Science Faculty of Science
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	Q Science (General)
spellingShingle	Q Science (General) Tahir, Norini Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
description	A low-cost, easily obtained and eco-friendly adsorbents has been investigated as an ideal alternative to the current expensive methods such as using activated carbon for removing dyes from wastewater. This study investigated the use of palm oil empty fruit bunch (POEFB) fibre, an agricultural waste, for the removal of Acid Orange 51 (AO51) dye from aqueous solutions. Batch mode experiments were conducted at room temperature (28 ± 2)°C to study the effect of particle size (75 µm, 250 µm and 2 mm), initial dye concentrations (10-200 mg/L) and temperature (30-50 °C) of adsorption characteristics of AO51 dye onto treated and non-treated POEFB fibre. It was found that the adsorption removal of AO51 dye by treated POEFB fibre was ~5%, which was far lower than that of ~60% on the untreated POEFB fibre. The equilibrium adsorption isotherms and kinetics were further investigated for untreated POEFB fibre. The adsorption equilibrium data were analyzed by Langmuir, Freundlich and Temkin isotherm models. The results indicated that the equilibrium sorption fitted well with the Freundlich isotherm, displaying higher regression coefficient, R2 value. Adsorption kinetic data were modeled using the pseudo-first-order, pseudo-second-order and intraparticle diffusion models. It was shown that pseudo-second-order kinetic model could best describe the adsorption kinetics. Isotherms have also been used to obtain the thermodynamic parameters, namely enthalpy and entropy of adsorption. The result showed negative value for both enthalpy (-13.91 kJ/mol) and entropy (-38.43 J/mol K) changes. Based on the isotherm studies, it can be concluded that the adsorption of AO51 dye onto untreated POEFB is favorable via physical adsorption. Thermodynamically, the final adsorbed state of the dye molecule is lower in energy compared to initial state. These results indicate the potential of using POEFB fibre as a low-cost adsorbent material for adsorption of the AO51 dye from aqueous solutions.
format	Thesis
qualification_level	Master's degree
author	Tahir, Norini
author_facet	Tahir, Norini
author_sort	Tahir, Norini
title	Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
title_short	Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
title_full	Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
title_fullStr	Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
title_full_unstemmed	Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
title_sort	equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch
granting_institution	Universiti Teknologi Malaysia, Faculty of Science
granting_department	Faculty of Science
publishDate	2011
url	http://eprints.utm.my/id/eprint/33341/1/NoriniTahirMFS2011.pdf
_version_	1747816137899376640

Equilibrium, kinetics and thermodynamics of acid dye adsorption on palm oil empty fruit bunch

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