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Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study

Agglomeration is a major setback in the use of pristine multiwall carbon nanotube for many applications. Therefore, application of hydroxyl functionalized multiwall carbon nanotubes (MWCNT-OH) for the removal of naphthalene and fluorine was investigated and compared with pristine MWCNT for the first...

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Main Authors: Akinpelu, Adeola Akeem, Ali, Md. Eaqub, Johan, Mohd Rafie, Saidur, Rahman, Chowdhury, Zaira Zaman, Shemsi, Ahsan Mushir, Saleh, Tawfik A.
Format: Article
Published: Elsevier 2019
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QD Chemistry
Online Access:http://eprints.um.edu.my/24383/
https://doi.org/10.1016/j.molliq.2019.111107
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spelling my.um.eprints.243832020-05-27T05:17:56Z http://eprints.um.edu.my/24383/ Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study Akinpelu, Adeola Akeem Ali, Md. Eaqub Johan, Mohd Rafie Saidur, Rahman Chowdhury, Zaira Zaman Shemsi, Ahsan Mushir Saleh, Tawfik A. QD Chemistry Agglomeration is a major setback in the use of pristine multiwall carbon nanotube for many applications. Therefore, application of hydroxyl functionalized multiwall carbon nanotubes (MWCNT-OH) for the removal of naphthalene and fluorine was investigated and compared with pristine MWCNT for the first time. FTIR, BET, TGA, SEM, and TEM were used to investigate the functional group, microstructure and morphology of MWCNT and MWCNT-OH. The BET results showed more mesoporosity for MWCNT-OH than MWCNT. Batch equilibrium adsorption data were fitted to the Langmuir, Freundlich and Temkin models, of which the Langmuir model exhibited the best fit. The correlation of Langmuir model for naphthalene adsorption on MWCNT-OH was observed to be higher (i.e. R2 = 0.9703 for MWCNT-OH and R2 = 0.5082 for MWCNT) while the correlation for adsorption of flourene is higher for MWCNT (i.e. R2 = 0.998 for MWCNT and R2 = 0.9517 for MWCNT-OH). The maximum adsorption capacity (qe) for MWCNT-OH (57.401 ng/g-356.121 ng/g for naph and 61.235 ng/g - 367.361 ng/g for fluorene) was generally higher and more stable for lower concentration ranges while it is comparable with MWCNT (48.177 ng/g - 354.00 ng/g for naph and 59.635 ng/g- 366.709 ng/g for fluorene) at higher concentration. The qe calculated (344.828 ng/g for naph and 357.143 ng/g for fluorene) using PSO was observed to be much closer to experimental qe (356.121 ng/g for naph and 367.361 ng/g for fluorine) for MWCNT-OH adsorbent than MWCNT (cal qe are 384.615 ng/g for naph and 400.000 ng/g for fluorene; exp qe 354.00 ng/g for naph and 366.709 ng/g for fluorene). The value of boundary layer thickness, is >0, this indicates the reaction process is quite complex and is not solely controlled by the intra-particle diffusion. The results of this study indicate the high potential of the developed MWCNT-OH adsorbent as an efficient and successful material for the removal of carcinogenic PAHs from the water body. © 2019 Elsevier B.V. Elsevier 2019 Article PeerReviewed Akinpelu, Adeola Akeem and Ali, Md. Eaqub and Johan, Mohd Rafie and Saidur, Rahman and Chowdhury, Zaira Zaman and Shemsi, Ahsan Mushir and Saleh, Tawfik A. (2019) Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study. Journal of Molecular Liquids, 289. p. 111107. ISSN 0167-7322 https://doi.org/10.1016/j.molliq.2019.111107 doi:10.1016/j.molliq.2019.111107
institution Universiti Malaya
building UM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaya
content_source UM Research Repository
url_provider http://eprints.um.edu.my/
topic QD Chemistry
spellingShingle QD Chemistry
Akinpelu, Adeola Akeem
Ali, Md. Eaqub
Johan, Mohd Rafie
Saidur, Rahman
Chowdhury, Zaira Zaman
Shemsi, Ahsan Mushir
Saleh, Tawfik A.
Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
description Agglomeration is a major setback in the use of pristine multiwall carbon nanotube for many applications. Therefore, application of hydroxyl functionalized multiwall carbon nanotubes (MWCNT-OH) for the removal of naphthalene and fluorine was investigated and compared with pristine MWCNT for the first time. FTIR, BET, TGA, SEM, and TEM were used to investigate the functional group, microstructure and morphology of MWCNT and MWCNT-OH. The BET results showed more mesoporosity for MWCNT-OH than MWCNT. Batch equilibrium adsorption data were fitted to the Langmuir, Freundlich and Temkin models, of which the Langmuir model exhibited the best fit. The correlation of Langmuir model for naphthalene adsorption on MWCNT-OH was observed to be higher (i.e. R2 = 0.9703 for MWCNT-OH and R2 = 0.5082 for MWCNT) while the correlation for adsorption of flourene is higher for MWCNT (i.e. R2 = 0.998 for MWCNT and R2 = 0.9517 for MWCNT-OH). The maximum adsorption capacity (qe) for MWCNT-OH (57.401 ng/g-356.121 ng/g for naph and 61.235 ng/g - 367.361 ng/g for fluorene) was generally higher and more stable for lower concentration ranges while it is comparable with MWCNT (48.177 ng/g - 354.00 ng/g for naph and 59.635 ng/g- 366.709 ng/g for fluorene) at higher concentration. The qe calculated (344.828 ng/g for naph and 357.143 ng/g for fluorene) using PSO was observed to be much closer to experimental qe (356.121 ng/g for naph and 367.361 ng/g for fluorine) for MWCNT-OH adsorbent than MWCNT (cal qe are 384.615 ng/g for naph and 400.000 ng/g for fluorene; exp qe 354.00 ng/g for naph and 366.709 ng/g for fluorene). The value of boundary layer thickness, is >0, this indicates the reaction process is quite complex and is not solely controlled by the intra-particle diffusion. The results of this study indicate the high potential of the developed MWCNT-OH adsorbent as an efficient and successful material for the removal of carcinogenic PAHs from the water body. © 2019 Elsevier B.V.
format Article
author Akinpelu, Adeola Akeem
Ali, Md. Eaqub
Johan, Mohd Rafie
Saidur, Rahman
Chowdhury, Zaira Zaman
Shemsi, Ahsan Mushir
Saleh, Tawfik A.
author_facet Akinpelu, Adeola Akeem
Ali, Md. Eaqub
Johan, Mohd Rafie
Saidur, Rahman
Chowdhury, Zaira Zaman
Shemsi, Ahsan Mushir
Saleh, Tawfik A.
author_sort Akinpelu, Adeola Akeem
title Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
title_short Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
title_full Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
title_fullStr Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
title_full_unstemmed Effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (PAH) with carbon nanotubes: Adsorption kinetic and isotherm study
title_sort effect of the oxidation process on the molecular interaction of polyaromatic hydrocarbons (pah) with carbon nanotubes: adsorption kinetic and isotherm study
publisher Elsevier
publishDate 2019
url http://eprints.um.edu.my/24383/
https://doi.org/10.1016/j.molliq.2019.111107
_version_ 1669007997736583168
score 13.211869

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