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Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles

Thioctic acid functionalized silica coated magnetite nanoparticles, RS-SR-NH-SiO2-Fe3O4, has been synthesized and its ability for the recovery of Au(III) in aqueous solutions was assessed. The results of the adsorption thermodynamics and kinetics showed that this magnetic adsorbent has good adsorpti...

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Main Authors: Abd. Razak, Nur Fadzilah, Shamsuddin, Mustaffa, Lee, Siew Ling
Format: Article
Published: Elsevier B.V. 2018
Subjects:
QD Chemistry
Online Access:http://eprints.utm.my/id/eprint/97083/
http://dx.doi.org/10.1016/j.cherd.2017.12.004
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spelling my.utm.970832022-09-12T07:58:24Z http://eprints.utm.my/id/eprint/97083/ Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles Abd. Razak, Nur Fadzilah Shamsuddin, Mustaffa Lee, Siew Ling QD Chemistry Thioctic acid functionalized silica coated magnetite nanoparticles, RS-SR-NH-SiO2-Fe3O4, has been synthesized and its ability for the recovery of Au(III) in aqueous solutions was assessed. The results of the adsorption thermodynamics and kinetics showed that this magnetic adsorbent has good adsorption capacity for Au(III) and the best interpretation for the experimental data was given by the Langmuir isotherm model. The adsorption kinetics of RS-SR-NH-SiO2-Fe3O4 was well fitted with the pseudo-second-order rate equation. The thermodynamic parameters ΔG, ΔH and ΔS were also evaluated and the overall adsorption process was exothermic and spontaneous in nature. Elsevier B.V. 2018-02 Article PeerReviewed Abd. Razak, Nur Fadzilah and Shamsuddin, Mustaffa and Lee, Siew Ling (2018) Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles. Chemical Engineering Research and Design, 130 (NA). pp. 18-28. ISSN 0263-8762 http://dx.doi.org/10.1016/j.cherd.2017.12.004 DOI:10.1016/j.cherd.2017.12.004
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QD Chemistry
spellingShingle QD Chemistry
Abd. Razak, Nur Fadzilah
Shamsuddin, Mustaffa
Lee, Siew Ling
Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
description Thioctic acid functionalized silica coated magnetite nanoparticles, RS-SR-NH-SiO2-Fe3O4, has been synthesized and its ability for the recovery of Au(III) in aqueous solutions was assessed. The results of the adsorption thermodynamics and kinetics showed that this magnetic adsorbent has good adsorption capacity for Au(III) and the best interpretation for the experimental data was given by the Langmuir isotherm model. The adsorption kinetics of RS-SR-NH-SiO2-Fe3O4 was well fitted with the pseudo-second-order rate equation. The thermodynamic parameters ΔG, ΔH and ΔS were also evaluated and the overall adsorption process was exothermic and spontaneous in nature.
format Article
author Abd. Razak, Nur Fadzilah
Shamsuddin, Mustaffa
Lee, Siew Ling
author_facet Abd. Razak, Nur Fadzilah
Shamsuddin, Mustaffa
Lee, Siew Ling
author_sort Abd. Razak, Nur Fadzilah
title Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
title_short Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
title_full Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
title_fullStr Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
title_full_unstemmed Adsorption kinetics and thermodynamics studies of gold(III) ions using thioctic acid functionalized silica coated magnetite nanoparticles
title_sort adsorption kinetics and thermodynamics studies of gold(iii) ions using thioctic acid functionalized silica coated magnetite nanoparticles
publisher Elsevier B.V.
publishDate 2018
url http://eprints.utm.my/id/eprint/97083/
http://dx.doi.org/10.1016/j.cherd.2017.12.004
_version_ 1744353711425060864
score 13.211869

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