Removal of direct blue 71 and methylene blue from water by graphene oxide: effects of charge interaction and experimental parameters

Tran, DT; Nguyen, TH; Doan, TH; Dang, VC; Nghiem, LD

Removal of direct blue 71 and methylene blue from water by graphene oxide: effects of charge interaction and experimental parameters

Tran, DT Nguyen, TH Doan, TH Dang, VC Nghiem, LD

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Publisher:: TAYLOR & FRANCIS INC
Publication Type:: Journal Article
Citation:: Journal of Dispersion Science and Technology, 2022
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Tran, DT
dc.contributor.author	Nguyen, TH
dc.contributor.author	Doan, TH
dc.contributor.author	Dang, VC
dc.contributor.author	Nghiem, LD
dc.date.accessioned	2023-04-20T03:26:50Z
dc.date.available	2023-04-20T03:26:50Z
dc.date.issued	2022-01-01
dc.identifier.citation	Journal of Dispersion Science and Technology, 2022
dc.identifier.issn	0193-2691
dc.identifier.issn	1532-2351
dc.identifier.uri	http://hdl.handle.net/10453/170019
dc.description.abstract	Graphene oxide (GO) was synthesized by modified the Hummers method and used as an effective adsorbent for removing direct blue 71 (DB 71) and methylene blue (MB) from water. Surface characteristics of the produced GO materials and related physiochemical properties of the organic dyes were systematically examined to reveal removal mechanisms. Thermodynamics, kinetics, and regeneration of GO adsorbent were also studied to disclose the nature of the adsorption and the reusability of adsorbent. GO adsorbed the cationic MB better than the anionic DB 71 mainly due to the electrostatic attraction between negatively charged GO’s surface and the positively charged MB molecules. Langmuir isotherm better described MB and DB 71 adsorption than the Freundlich model. The adsorption capacities of GO of 476.19 mg/g (for MB) and 175.41 mg/g (for DB 71) were considerably higher than those of other adsorbents such as activated carbon, chitosan, and biochar. MB and DB 71 adsorption process was spontaneous, endothermic, and governed by both physisorption and chemisorption. GO could be regenerated by methanol and dilute HCl solutions, and reused as an efficient adsorbent. This study provides a comprehensive data on the MB and DB71 adsorption processes, and an efficient approach on the regeneration of GO adsorbent.
dc.language	English
dc.publisher	TAYLOR & FRANCIS INC
dc.relation.ispartof	Journal of Dispersion Science and Technology
dc.relation.isbasedon	10.1080/01932691.2022.2102034
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry
dc.subject.classification	Chemical Physics
dc.title	Removal of direct blue 71 and methylene blue from water by graphene oxide: effects of charge interaction and experimental parameters
dc.type	Journal Article
utslib.for	0303 Macromolecular and Materials Chemistry
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
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-20T03:26:48Z
pubs.publication-status	Published

Abstract:

Graphene oxide (GO) was synthesized by modified the Hummers method and used as an effective adsorbent for removing direct blue 71 (DB 71) and methylene blue (MB) from water. Surface characteristics of the produced GO materials and related physiochemical properties of the organic dyes were systematically examined to reveal removal mechanisms. Thermodynamics, kinetics, and regeneration of GO adsorbent were also studied to disclose the nature of the adsorption and the reusability of adsorbent. GO adsorbed the cationic MB better than the anionic DB 71 mainly due to the electrostatic attraction between negatively charged GO’s surface and the positively charged MB molecules. Langmuir isotherm better described MB and DB 71 adsorption than the Freundlich model. The adsorption capacities of GO of 476.19 mg/g (for MB) and 175.41 mg/g (for DB 71) were considerably higher than those of other adsorbents such as activated carbon, chitosan, and biochar. MB and DB 71 adsorption process was spontaneous, endothermic, and governed by both physisorption and chemisorption. GO could be regenerated by methanol and dilute HCl solutions, and reused as an efficient adsorbent. This study provides a comprehensive data on the MB and DB71 adsorption processes, and an efficient approach on the regeneration of GO adsorbent.

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http://hdl.handle.net/10453/170019