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Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions

Due to the release of hazardous heavy metals from various industries, water pollution has become one of the biggest challenges for environmental scientists today. Mercury Hg(II) is regarded as one of the most toxic heavy metals due to its ability to cause cancer and other health issues. In this stud...

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Main Authors: Abubakar, Lawal, Yusof, Nor Azah, Abdullah, Abdul Halim, Mohammad, Faruq, Wahid, Mohd Hanif, Ismail, Suhainie, Abdul Rahim, Zulaiha, Al-Lohedan, Hamad A., Soleiman, Ahmed A.
Format: Article
Language:English
Published: Multidisciplinary Digital Publishing Institute 2023
Online Access:http://psasir.upm.edu.my/id/eprint/108778/1/108778.pdf
http://psasir.upm.edu.my/id/eprint/108778/
https://www.mdpi.com/2297-8739/10/8/454
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spelling my.upm.eprints.1087782024-10-11T08:53:57Z http://psasir.upm.edu.my/id/eprint/108778/ Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions Abubakar, Lawal Yusof, Nor Azah Abdullah, Abdul Halim Mohammad, Faruq Wahid, Mohd Hanif Ismail, Suhainie Abdul Rahim, Zulaiha Al-Lohedan, Hamad A. Soleiman, Ahmed A. Due to the release of hazardous heavy metals from various industries, water pollution has become one of the biggest challenges for environmental scientists today. Mercury Hg(II) is regarded as one of the most toxic heavy metals due to its ability to cause cancer and other health issues. In this study, a tailor-made modern eco-friendly molecularly imprinted polymer (MIP)/nanoporous carbon (NC) nanocomposite was synthesized and examined for the uptake of Hg(II) using an aqueous solution. The fabrication of the MIP/NC nanocomposite occurred via bulk polymerization involving the complexation of the template, followed by polymerization and, finally, template removal. Thus, the formed nanocomposite underwent characterizations that included morphological, thermal degradation, functional, and surface area analyses. The MIP/NC nanocomposite, with a high specific surface area of 884.9 m2/g, was evaluated for its efficacy towards the adsorptive elimination of Hg(II) against the pH solution changes, the dosage of adsorbent, initial concentration, and interaction time. The analysis showed that a maximum Hg(II) adsorption effectiveness of 116 mg/g was attained at pH 4, while the Freundlich model fitted the equilibrium sorption result and was aligned with pseudo-second-order kinetics. Likewise, thermodynamic parameters like enthalpy, entropy, and Gibbs free energy indicated that the adsorption was consistent with spontaneous, favorable, and endothermic reactions. Furthermore, the adsorption efficiency of MIP/NC was also evaluated against a real sample of condensate from the oil and gas industry, showing an 87.4 recovery of Hg(II). Finally, the synthesized MIP/NC showed promise as a selective adsorbent of Hg(II) in polluted environments, suggesting that a variety of combined absorbents of different precursors is recommended to evaluate heavy metal and pharmaceutical removals. Multidisciplinary Digital Publishing Institute 2023-08-17 Article PeerReviewed text en cc_by_4 http://psasir.upm.edu.my/id/eprint/108778/1/108778.pdf Abubakar, Lawal and Yusof, Nor Azah and Abdullah, Abdul Halim and Mohammad, Faruq and Wahid, Mohd Hanif and Ismail, Suhainie and Abdul Rahim, Zulaiha and Al-Lohedan, Hamad A. and Soleiman, Ahmed A. (2023) Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions. Separations, 10 (8). art. no. 454. pp. 1-17. ISSN 2297-8739 https://www.mdpi.com/2297-8739/10/8/454 10.3390/separations10080454
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Due to the release of hazardous heavy metals from various industries, water pollution has become one of the biggest challenges for environmental scientists today. Mercury Hg(II) is regarded as one of the most toxic heavy metals due to its ability to cause cancer and other health issues. In this study, a tailor-made modern eco-friendly molecularly imprinted polymer (MIP)/nanoporous carbon (NC) nanocomposite was synthesized and examined for the uptake of Hg(II) using an aqueous solution. The fabrication of the MIP/NC nanocomposite occurred via bulk polymerization involving the complexation of the template, followed by polymerization and, finally, template removal. Thus, the formed nanocomposite underwent characterizations that included morphological, thermal degradation, functional, and surface area analyses. The MIP/NC nanocomposite, with a high specific surface area of 884.9 m2/g, was evaluated for its efficacy towards the adsorptive elimination of Hg(II) against the pH solution changes, the dosage of adsorbent, initial concentration, and interaction time. The analysis showed that a maximum Hg(II) adsorption effectiveness of 116 mg/g was attained at pH 4, while the Freundlich model fitted the equilibrium sorption result and was aligned with pseudo-second-order kinetics. Likewise, thermodynamic parameters like enthalpy, entropy, and Gibbs free energy indicated that the adsorption was consistent with spontaneous, favorable, and endothermic reactions. Furthermore, the adsorption efficiency of MIP/NC was also evaluated against a real sample of condensate from the oil and gas industry, showing an 87.4 recovery of Hg(II). Finally, the synthesized MIP/NC showed promise as a selective adsorbent of Hg(II) in polluted environments, suggesting that a variety of combined absorbents of different precursors is recommended to evaluate heavy metal and pharmaceutical removals.
format Article
author Abubakar, Lawal
Yusof, Nor Azah
Abdullah, Abdul Halim
Mohammad, Faruq
Wahid, Mohd Hanif
Ismail, Suhainie
Abdul Rahim, Zulaiha
Al-Lohedan, Hamad A.
Soleiman, Ahmed A.
spellingShingle Abubakar, Lawal
Yusof, Nor Azah
Abdullah, Abdul Halim
Mohammad, Faruq
Wahid, Mohd Hanif
Ismail, Suhainie
Abdul Rahim, Zulaiha
Al-Lohedan, Hamad A.
Soleiman, Ahmed A.
Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
author_facet Abubakar, Lawal
Yusof, Nor Azah
Abdullah, Abdul Halim
Mohammad, Faruq
Wahid, Mohd Hanif
Ismail, Suhainie
Abdul Rahim, Zulaiha
Al-Lohedan, Hamad A.
Soleiman, Ahmed A.
author_sort Abubakar, Lawal
title Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
title_short Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
title_full Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
title_fullStr Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
title_full_unstemmed Molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of Hg(II) ions from aqueous suspensions
title_sort molecularly imprinted polymer-based nanoporous carbon nanocomposite for effective adsorption of hg(ii) ions from aqueous suspensions
publisher Multidisciplinary Digital Publishing Institute
publishDate 2023
url http://psasir.upm.edu.my/id/eprint/108778/1/108778.pdf
http://psasir.upm.edu.my/id/eprint/108778/
https://www.mdpi.com/2297-8739/10/8/454
_version_ 1814054667714297856
score 13.211869

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