Investigation of the Electromagnetic Enhancement for the Abatement of Hexavalent Chromium Using Magnetite as Adsorben

L. Muza, D. Dube, Aoyi Ochieng, Harry Chiririwa

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

This study examined the removal of Cr(VI) using magnetite assisted by an electromagnetic field. These magnetic nanoparticles can be used to adsorb Cr(IV) ions in wastewater. Batch experiments were carried out to investigate the adsorption of hexavalent chromium onto magnetic nanoparticles. The adsorption equilibrium was attained with a 45 min contact time. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich models. The adsorption isotherm fitted well to both isotherms with maximum adsorption capacity of 0.147 mg g−1. The adsorption was between 32.7 and 97.8 % under conditions studied. The results showed that the nanoparticles in the presence of an external magnetic field, generated by an optimum current of 2.5 A, have the highest adsorption capacity for Cr(VI) ions per unit magnetite weight.
Original languageEnglish
Pages (from-to)859-865
JournalIranian Journal of Science and Technology, Transaction A: Science
Volume41
Issue number3
DOIs
Publication statusPublished - 2017

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Ferrosoferric Oxide
magnetite
Chromium
Electromagnetic Phenomena
chromium
Adsorption
adsorption
Enhancement
electromagnetism
augmentation
nanoparticles
Nanoparticles
Adsorption isotherms
Magnetic Nanoparticles
isotherm
isotherms
Ions
ions
Electromagnetic fields
Isotherms

Cite this

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abstract = "This study examined the removal of Cr(VI) using magnetite assisted by an electromagnetic field. These magnetic nanoparticles can be used to adsorb Cr(IV) ions in wastewater. Batch experiments were carried out to investigate the adsorption of hexavalent chromium onto magnetic nanoparticles. The adsorption equilibrium was attained with a 45 min contact time. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich models. The adsorption isotherm fitted well to both isotherms with maximum adsorption capacity of 0.147 mg g−1. The adsorption was between 32.7 and 97.8 {\%} under conditions studied. The results showed that the nanoparticles in the presence of an external magnetic field, generated by an optimum current of 2.5 A, have the highest adsorption capacity for Cr(VI) ions per unit magnetite weight.",
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Investigation of the Electromagnetic Enhancement for the Abatement of Hexavalent Chromium Using Magnetite as Adsorben. / Muza, L.; Dube, D.; Ochieng, Aoyi; Chiririwa, Harry.

In: Iranian Journal of Science and Technology, Transaction A: Science, Vol. 41, No. 3, 2017, p. 859-865.

Research output: Contribution to journalArticle

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T1 - Investigation of the Electromagnetic Enhancement for the Abatement of Hexavalent Chromium Using Magnetite as Adsorben

AU - Muza, L.

AU - Dube, D.

AU - Ochieng, Aoyi

AU - Chiririwa, Harry

PY - 2017

Y1 - 2017

N2 - This study examined the removal of Cr(VI) using magnetite assisted by an electromagnetic field. These magnetic nanoparticles can be used to adsorb Cr(IV) ions in wastewater. Batch experiments were carried out to investigate the adsorption of hexavalent chromium onto magnetic nanoparticles. The adsorption equilibrium was attained with a 45 min contact time. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich models. The adsorption isotherm fitted well to both isotherms with maximum adsorption capacity of 0.147 mg g−1. The adsorption was between 32.7 and 97.8 % under conditions studied. The results showed that the nanoparticles in the presence of an external magnetic field, generated by an optimum current of 2.5 A, have the highest adsorption capacity for Cr(VI) ions per unit magnetite weight.

AB - This study examined the removal of Cr(VI) using magnetite assisted by an electromagnetic field. These magnetic nanoparticles can be used to adsorb Cr(IV) ions in wastewater. Batch experiments were carried out to investigate the adsorption of hexavalent chromium onto magnetic nanoparticles. The adsorption equilibrium was attained with a 45 min contact time. The equilibrium adsorption isotherms were evaluated using Langmuir and Freundlich models. The adsorption isotherm fitted well to both isotherms with maximum adsorption capacity of 0.147 mg g−1. The adsorption was between 32.7 and 97.8 % under conditions studied. The results showed that the nanoparticles in the presence of an external magnetic field, generated by an optimum current of 2.5 A, have the highest adsorption capacity for Cr(VI) ions per unit magnetite weight.

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JO - Iranian Journal of Science and Technology, Transaction A: Science

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SN - 1028-6276

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