Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent
Ionic liquid modified reduced graphene oxide (IL-rGO) was prepared and examined for chromate removal. The sorbent was characterized by N2 adsorption-desorption measurement (BET), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectro...
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Croatian Society of Chemical Engineers
2017-10-01
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doaj-012f094912ca4abe98e96306cf798de12020-11-24T23:29:22ZengCroatian Society of Chemical EngineersChemical and Biochemical Engineering Quarterly0352-95681846-51532017-10-0131332533410.15255/CABEQ.2016.872Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide SorbentA. Nasrollahpour0S. E. Moradi1J. Khodaveisi2Young Researchers and Elite Club, Sari Branch, Islamic Azad University, Sari, Iran Young Researchers and Elite Club, Sari Branch, Islamic Azad University, Sari, Iran Department of Science, Sari Branch, Islamic Azad University, Sari, IranIonic liquid modified reduced graphene oxide (IL-rGO) was prepared and examined for chromate removal. The sorbent was characterized by N2 adsorption-desorption measurement (BET), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. The sorption behavior of chromate on the ionic liquid modified reduced graphene oxide sorbent from an aqueous medium was studied by varying the parameters such as contact time, initial chromate concentration, pH, and agitation speed. The results showed that sorption kinetics of chromate by IL-rGO follows the pseudo second order, which indicates that the sorption mechanism is both chemical and physical interaction. The sorption isotherm studies revealed that Langmuir model provided the best fit to all the experimental data with an adsorption capacity of 232.55 mg g–1 for IL-rGO. Thermodynamic parameters, such as Gibbs free energy (–2.85 kJ mol–1 at 298 K), enthalpy (55.41 kJ mol–1), and entropy (11.64 J mol–1 K–1) of sorption of the chromate on ionic liquid modified reduced graphene oxide was evaluated, and it was found that the reaction was spontaneous and endothermic in nature.http://silverstripe.fkit.hr/cabeq/assets/Uploads/13-3-17.pdfLangmuir isothermionic liquidreduced graphene oxidechromateremoval |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
A. Nasrollahpour S. E. Moradi J. Khodaveisi |
spellingShingle |
A. Nasrollahpour S. E. Moradi J. Khodaveisi Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent Chemical and Biochemical Engineering Quarterly Langmuir isotherm ionic liquid reduced graphene oxide chromate removal |
author_facet |
A. Nasrollahpour S. E. Moradi J. Khodaveisi |
author_sort |
A. Nasrollahpour |
title |
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent |
title_short |
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent |
title_full |
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent |
title_fullStr |
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent |
title_full_unstemmed |
Effective Removal of Hexavalent Chromium from Aqueous Solutions Using Ionic Liquid Modified Graphene Oxide Sorbent |
title_sort |
effective removal of hexavalent chromium from aqueous solutions using ionic liquid modified graphene oxide sorbent |
publisher |
Croatian Society of Chemical Engineers |
series |
Chemical and Biochemical Engineering Quarterly |
issn |
0352-9568 1846-5153 |
publishDate |
2017-10-01 |
description |
Ionic liquid modified reduced graphene oxide (IL-rGO) was prepared and examined for chromate removal. The sorbent was characterized by N2 adsorption-desorption measurement (BET), transmission electron microscopy (TEM), powder X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) analysis. The sorption behavior of chromate on the ionic liquid modified reduced graphene oxide sorbent from an aqueous
medium was studied by varying the parameters such as contact time, initial chromate concentration, pH, and agitation speed. The results showed that sorption kinetics of chromate by IL-rGO follows the pseudo second order, which indicates that the sorption mechanism is both chemical and physical interaction. The sorption isotherm studies revealed that Langmuir model provided the best fit to all the experimental data with an adsorption capacity of 232.55 mg g–1 for IL-rGO. Thermodynamic parameters, such as Gibbs free energy (–2.85 kJ mol–1 at 298 K), enthalpy (55.41 kJ mol–1), and entropy (11.64 J mol–1 K–1) of sorption of the chromate on ionic liquid modified reduced graphene oxide was evaluated, and it was found that the reaction was spontaneous and endothermic in nature. |
topic |
Langmuir isotherm ionic liquid reduced graphene oxide chromate removal |
url |
http://silverstripe.fkit.hr/cabeq/assets/Uploads/13-3-17.pdf |
work_keys_str_mv |
AT anasrollahpour effectiveremovalofhexavalentchromiumfromaqueoussolutionsusingionicliquidmodifiedgrapheneoxidesorbent AT semoradi effectiveremovalofhexavalentchromiumfromaqueoussolutionsusingionicliquidmodifiedgrapheneoxidesorbent AT jkhodaveisi effectiveremovalofhexavalentchromiumfromaqueoussolutionsusingionicliquidmodifiedgrapheneoxidesorbent |
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1725546005589393408 |