Adsorption of fluoride from aqueous solutions using graphene oxide composite materials at a neutral pH

Chen, Y; Chen, Q; Kasomo, RM; Jin, Y; Yang, P; Zheng, H; Weng, X; Li, H; Song, S

Adsorption of fluoride from aqueous solutions using graphene oxide composite materials at a neutral pH

Chen, Y Chen, Q Kasomo, RM Jin, Y Yang, P Zheng, H Weng, X Li, H Song, S

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Journal of Molecular Liquids, 2023, 377, pp. 121467
Issue Date:: 2023-05-01

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Field	Value	Language
dc.contributor.author	Chen, Y
dc.contributor.author	Chen, Q
dc.contributor.author	Kasomo, RM
dc.contributor.author	Jin, Y
dc.contributor.author	Yang, P
dc.contributor.author	Zheng, H
dc.contributor.author	Weng, X
dc.contributor.author	Li, H
dc.contributor.author	Song, S
dc.date.accessioned	2024-04-14T22:31:17Z
dc.date.available	2024-04-14T22:31:17Z
dc.date.issued	2023-05-01
dc.identifier.citation	Journal of Molecular Liquids, 2023, 377, pp. 121467
dc.identifier.issn	0167-7322
dc.identifier.uri	http://hdl.handle.net/10453/177907
dc.description.abstract	Adsorption methods have garnered significant attention for fluoride removal from water bodies owing to their superior selectivity, simple operations, and wider applicability. However, the development of adsorbents with higher adsorption performances requires significant attention. Here, graphene oxide is endowed with excellent affinity towards fluoride by doping polyhydroxy complexes onto its surface structure and regulating the potential charge. Multiple detection measurements involving scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), and transmission electron microscopy (TEM) were employed to demonstrate the textural properties of graphene oxide (GO) modified by polyaluminium chloride (HAO@GO). Conversely, the effects of parameters including the preparation conditions, co-existing competitive ions, recyclability, contact time, and initial concentration on the adsorption behaviors were systematically determined. The adsorption experimental data were fitted well by the Langmuir isotherm model and pseudo-first-order model. The calculated maximum adsorption capacity was 129.23 mg/g at room temperature (25 °C) and a pH of 7.00, which is greater than that of most reported adsorbents. The existence of competitive anions, such as NO3-, SO42-, and PO43-, unavoidably interferes with fluoride adsorption. TEM, zero point of charge test, adsorption isotherm, and X-ray photoelectron spectroscopy (XPS) tests indicated that chemical adsorption and ligand exchange are responsible for the adsorption of fluoride onto HAO@GO.
dc.language	en
dc.publisher	Elsevier
dc.relation.ispartof	Journal of Molecular Liquids
dc.relation.isbasedon	10.1016/j.molliq.2023.121467
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0306 Physical Chemistry (incl. Structural)
dc.subject.classification	Chemical Physics
dc.subject.classification	3406 Physical chemistry
dc.subject.classification	4004 Chemical engineering
dc.title	Adsorption of fluoride from aqueous solutions using graphene oxide composite materials at a neutral pH
dc.type	Journal Article
utslib.citation.volume	377
utslib.for	0306 Physical Chemistry (incl. Structural)
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-14T22:31:14Z
pubs.publication-status	Published
pubs.volume	377

Abstract:

Adsorption methods have garnered significant attention for fluoride removal from water bodies owing to their superior selectivity, simple operations, and wider applicability. However, the development of adsorbents with higher adsorption performances requires significant attention. Here, graphene oxide is endowed with excellent affinity towards fluoride by doping polyhydroxy complexes onto its surface structure and regulating the potential charge. Multiple detection measurements involving scanning electron microscopy (SEM) equipped with energy-dispersive X-ray spectroscopy (EDS), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD), and transmission electron microscopy (TEM) were employed to demonstrate the textural properties of graphene oxide (GO) modified by polyaluminium chloride (HAO@GO). Conversely, the effects of parameters including the preparation conditions, co-existing competitive ions, recyclability, contact time, and initial concentration on the adsorption behaviors were systematically determined. The adsorption experimental data were fitted well by the Langmuir isotherm model and pseudo-first-order model. The calculated maximum adsorption capacity was 129.23 mg/g at room temperature (25 °C) and a pH of 7.00, which is greater than that of most reported adsorbents. The existence of competitive anions, such as NO3-, SO42-, and PO43-, unavoidably interferes with fluoride adsorption. TEM, zero point of charge test, adsorption isotherm, and X-ray photoelectron spectroscopy (XPS) tests indicated that chemical adsorption and ligand exchange are responsible for the adsorption of fluoride onto HAO@GO.

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http://hdl.handle.net/10453/177907