Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution

doi:10.1016/j.cjche.2024.03.030

Chinese Journal of Chemical Engineering ›› 2024, Vol. 73 ›› Issue (9): 51-61.DOI: 10.1016/j.cjche.2024.03.030

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Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution

Alireza Nouri¹, Siew Fen Chua¹, Ebrahim Mahmoudi^1,2, Abdul Wahab Mohammad³, Wei Lun Ang^1,2

1. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
2. Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
3. Chemical and Water Desalination Engineering Program, College of Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates

Received:2023-12-13 Revised:2024-03-10 Accepted:2024-03-12 Online:2024-05-16 Published:2024-11-21
Contact: Wei Lun Ang,E-mail:wl_ang@ukm.edu.my
Supported by:
The authors would like to thank the Qatar National Research Fund for funding this work through NPRP (10-0127-170270, acknowledged under the grant code KK-2018-008).

Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution

Alireza Nouri¹, Siew Fen Chua¹, Ebrahim Mahmoudi^1,2, Abdul Wahab Mohammad³, Wei Lun Ang^1,2

1. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
2. Centre for Sustainable Process Technology (CESPRO), Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi 43600, Malaysia;
3. Chemical and Water Desalination Engineering Program, College of Engineering, University of Sharjah, Sharjah 27272, United Arab Emirates

通讯作者: Wei Lun Ang,E-mail:wl_ang@ukm.edu.my
基金资助:
The authors would like to thank the Qatar National Research Fund for funding this work through NPRP (10-0127-170270, acknowledged under the grant code KK-2018-008).

Abstract

Abstract: Confronting the severe health threats and environmental impacts of Cr(VI) in aquatic environments demands innovative and effective remediation approaches. In this study, Graphene oxide (GO)-decorated poly(dimethyl amino ethyl methacrylate) (PDMAEMA) brush nanocomposites (GOP1, GOP2, GOP3, and GOP4) were fabricated using atom transfer radical polymerization (ATRP) by the “graft from” method. The resulting nanocomposites were utilized for removing Cr(VI) with good adsorption performance due to the electrostatic interaction of protonated nitrogen groups in the brush chains with negatively charged particles in the solution. The kinetic model of pseudo-second-order best represented the contaminants' adsorption characteristics. The Weber-Morris model further indicated that surface adsorption and intraparticle diffusion mechanisms primarily controlled the adsorption procedure. Additionally, the Langmuir and Temkin isotherm models were found to most accurately represent the adsorption characteristics of the pollutants on the nanocomposites, and GOP4 can achieve the maximum adsorption capacity of 164.4 mg·g^-1. The adsorbents' capacity maintains above 85% after five cycles of adsorption-desorption. The nanocomposites in this study demonstrate promising potential for eliminating Cr(VI) from aqueous solutions.

Key words: Graphene oxide, PDMAEMA brush, Polymerization, Nanoparticles, Adsorption, Chromium

摘要： Confronting the severe health threats and environmental impacts of Cr(VI) in aquatic environments demands innovative and effective remediation approaches. In this study, Graphene oxide (GO)-decorated poly(dimethyl amino ethyl methacrylate) (PDMAEMA) brush nanocomposites (GOP1, GOP2, GOP3, and GOP4) were fabricated using atom transfer radical polymerization (ATRP) by the “graft from” method. The resulting nanocomposites were utilized for removing Cr(VI) with good adsorption performance due to the electrostatic interaction of protonated nitrogen groups in the brush chains with negatively charged particles in the solution. The kinetic model of pseudo-second-order best represented the contaminants' adsorption characteristics. The Weber-Morris model further indicated that surface adsorption and intraparticle diffusion mechanisms primarily controlled the adsorption procedure. Additionally, the Langmuir and Temkin isotherm models were found to most accurately represent the adsorption characteristics of the pollutants on the nanocomposites, and GOP4 can achieve the maximum adsorption capacity of 164.4 mg·g^-1. The adsorbents' capacity maintains above 85% after five cycles of adsorption-desorption. The nanocomposites in this study demonstrate promising potential for eliminating Cr(VI) from aqueous solutions.

关键词: Graphene oxide, PDMAEMA brush, Polymerization, Nanoparticles, Adsorption, Chromium

Alireza Nouri, Siew Fen Chua, Ebrahim Mahmoudi, Abdul Wahab Mohammad, Wei Lun Ang. Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution[J]. Chinese Journal of Chemical Engineering, 2024, 73(9): 51-61.

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Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution

Fabrication of graphene oxide decorated with poly(dimethyl amino ethyl methacrylate) brush for efficient Cr(VI) adsorption from aqueous solution

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