Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes

Tansir Ahamad; Mu Naushad; Gaber E. Eldesoky; Sameerah I. Al-Saeedi; Ayman Nafady; Nada S. Al-Kadhi; Ala'a H. Al-Muhtaseb; Azmat Ali Khan; Aslam Khan

doi:10.1016/j.molliq.2019.02.128

Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes

Tansir Ahamad^*, Mu Naushad, Gaber E. Eldesoky, Sameerah I. Al-Saeedi, Ayman Nafady, Nada S. Al-Kadhi, Ala'a H. Al-Muhtaseb, Azmat Ali Khan, Aslam Khan

^*Corresponding author for this work

Petroleum and Chemical Engineering

Research output: Contribution to journal › Article › peer-review

133 Citations (Scopus)

Abstract

Amino functionalized multi-walled carbon nanotubes (NH ₂ -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe ₃ O ₄ ) were embedded with NH ₂ -MWCNTs and the developed magnetic carbon nanotube (NH ₂ -MWCNTs@Fe ₃ O ₄ ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH ₂ -MWCNTs@Fe ₃ O ₄ was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH ₂ -MWCNTs@Fe ₃ O ₄ had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g ⁻¹ indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG ⁰ ), enthalpy (ΔH ⁰ ) and entropy (ΔS ⁰ ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH ₂ -MWCNTs@Fe ₃ O ₄ was 80% of the original value. Hence, it can be concluded that NH ₂ -MWCNTs@Fe ₃ O ₄ had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

Original language	English
Pages (from-to)	154-161
Number of pages	8
Journal	Journal of Molecular Liquids
Volume	282
DOIs	https://doi.org/10.1016/j.molliq.2019.02.128
Publication status	Published - May 15 2019

Keywords

Adsorption
Amino functionalized
MB dye
Multi-walled carbon nanotubes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics
Spectroscopy
Physical and Theoretical Chemistry
Materials Chemistry

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10.1016/j.molliq.2019.02.128

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Ahamad, T., Naushad, M., Eldesoky, G. E., Al-Saeedi, S. I., Nafady, A., Al-Kadhi, N. S., Al-Muhtaseb, A. H., Khan, A. A., & Khan, A. (2019). Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes. Journal of Molecular Liquids, 282, 154-161. https://doi.org/10.1016/j.molliq.2019.02.128

@article{451de2cc49b14a02a5e8abe193f6e5ce,

title = "Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes",

abstract = " Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.",

keywords = "Adsorption, Amino functionalized, MB dye, Multi-walled carbon nanotubes",

author = "Tansir Ahamad and Mu Naushad and Eldesoky, {Gaber E.} and Al-Saeedi, {Sameerah I.} and Ayman Nafady and Al-Kadhi, {Nada S.} and Al-Muhtaseb, {Ala'a H.} and Khan, {Azmat Ali} and Aslam Khan",

note = "Publisher Copyright: {\textcopyright} 2019",

year = "2019",

month = may,

day = "15",

doi = "10.1016/j.molliq.2019.02.128",

language = "English",

volume = "282",

pages = "154--161",

journal = "Journal of Molecular Liquids",

issn = "0167-7322",

publisher = "Elsevier",

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TY - JOUR

T1 - Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes

AU - Ahamad, Tansir

AU - Naushad, Mu

AU - Eldesoky, Gaber E.

AU - Al-Saeedi, Sameerah I.

AU - Nafady, Ayman

AU - Al-Kadhi, Nada S.

AU - Al-Muhtaseb, Ala'a H.

AU - Khan, Azmat Ali

AU - Khan, Aslam

PY - 2019/5/15

Y1 - 2019/5/15

N2 - Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

AB - Amino functionalized multi-walled carbon nanotubes (NH 2 -MWCNTs) were prepared via chemical modification of the surface of multiwall carbon nanotubes. The magnetic nanoparticles (Fe 3 O 4 ) were embedded with NH 2 -MWCNTs and the developed magnetic carbon nanotube (NH 2 -MWCNTs@Fe 3 O 4 ) were characterized via several analytical techniques including FT-IR, Raman, XRD, TEM, SAED, SEM, BET and VSM. The fabricated NH 2 -MWCNTs@Fe 3 O 4 was used for the removal of toxic methylene blue dye (MB) from aqueous medium. The results of VSM indicated that the fabricated NH 2 -MWCNTs@Fe 3 O 4 had magnetic nature and the saturated magnetization was 37.91 emu/g. The effect of initial solution pH, temperature and contact time on MB adsorption was also investigated. The results of adsorption kinetics exhibited that the adsorption followed the linear pseudo-second-kinetic model well. Langmuir and Freundlich isotherm models were applied to understand the adsorption behaviors. The maximum adsorption capacity from the Langmuir isotherm equation reached 178.5 mg g −1 indicated that it was a good adsorbent for MB removal. The thermodynamics parameters such as Gibbs free energy (ΔG 0 ), enthalpy (ΔH 0 ) and entropy (ΔS 0 ), supported the spontaneous and exothermic nature of adsorption. It was noted that after six repetitive cycles, the adsorption capacity of NH 2 -MWCNTs@Fe 3 O 4 was 80% of the original value. Hence, it can be concluded that NH 2 -MWCNTs@Fe 3 O 4 had substantial reusability which made it an economical adsorbent for MB removal from aqueous medium.

KW - Adsorption

KW - Amino functionalized

KW - MB dye

KW - Multi-walled carbon nanotubes

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U2 - 10.1016/j.molliq.2019.02.128

DO - 10.1016/j.molliq.2019.02.128

M3 - Article

AN - SCOPUS:85062499112

SN - 0167-7322

VL - 282

SP - 154

EP - 161

JO - Journal of Molecular Liquids

JF - Journal of Molecular Liquids

ER -

Effective and fast adsorptive removal of toxic cationic dye (MB) from aqueous medium using amino-functionalized magnetic multiwall carbon nanotubes

Abstract

Keywords

ASJC Scopus subject areas

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