Sulfur-Modified Biochar Efficiently Removes Cr(VI) from Water by Sorption and Reduction

Du, Z; Yang, M; Yang, Y; Zhang, X; Chen, H; Ngo, HH; Liu, Q

Sulfur-Modified Biochar Efficiently Removes Cr(VI) from Water by Sorption and Reduction

Du, Z Yang, M Yang, Y Zhang, X Chen, H Ngo, HH Liu, Q

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Publisher:: Mary Ann Liebert
Publication Type:: Journal Article
Citation:: Environmental Engineering Science, 2023, 40, (9), pp. 362-372
Issue Date:: 2023-09-01

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Field	Value	Language
dc.contributor.author	Du, Z
dc.contributor.author	Yang, M
dc.contributor.author	Yang, Y
dc.contributor.author	Zhang, X
dc.contributor.author	Chen, H
dc.contributor.author	Ngo, HH
dc.contributor.author	Liu, Q
dc.date.accessioned	2024-03-11T02:03:24Z
dc.date.available	2024-03-11T02:03:24Z
dc.date.issued	2023-09-01
dc.identifier.citation	Environmental Engineering Science, 2023, 40, (9), pp. 362-372
dc.identifier.issn	1092-8758
dc.identifier.issn	1557-9018
dc.identifier.uri	http://hdl.handle.net/10453/176444
dc.description.abstract	Sulfur-modified biochar was prepared and used to efficiently remove Chromium (Cr) from water. It was found that the sulfur-modified biochar prepared from lower primary pyrolysis temperature (<400°C), higher secondary pyrolysis temperature (>400°C), appropriate secondary pyrolysis time, and S/C ratio was favorable for Cr removal. According to the response surface methodology analysis, the biochar prepared under the primary pyrolysis temperature of 350°C, secondary pyrolysis temperature of 450°C, secondary pyrolysis time of 60 min, and S/C ratio of 2:1 could achieve the maximum Cr removal (92%). The S-modified biochar prepared under the optimum condition exhibited greater capacity of adsorbing Cr(VI) or reducing Cr(VI) into Cr(III) compared with the biochar without the S modification. The enhanced Cr(VI) adsorption and reduction were likely because some of the sulfur-containing groups formed on the modified biochar could bind and interact with the Cr(VI). Besides, the enhanced surface area by the sulfur modification also played a role in prompting the removal and reduction of Cr(VI).
dc.language	en
dc.publisher	Mary Ann Liebert
dc.relation.ispartof	Environmental Engineering Science
dc.relation.isbasedon	10.1089/ees.2023.0046
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0502 Environmental Science and Management, 0904 Chemical Engineering, 0907 Environmental Engineering
dc.subject.classification	Environmental Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4104 Environmental management
dc.title	Sulfur-Modified Biochar Efficiently Removes Cr(VI) from Water by Sorption and Reduction
dc.type	Journal Article
utslib.citation.volume	40
utslib.for	0502 Environmental Science and Management
utslib.for	0904 Chemical Engineering
utslib.for	0907 Environmental Engineering
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	2024-03-11T02:03:23Z
pubs.issue	9
pubs.publication-status	Published
pubs.volume	40
utslib.citation.issue	9

Abstract:

Sulfur-modified biochar was prepared and used to efficiently remove Chromium (Cr) from water. It was found that the sulfur-modified biochar prepared from lower primary pyrolysis temperature (<400°C), higher secondary pyrolysis temperature (>400°C), appropriate secondary pyrolysis time, and S/C ratio was favorable for Cr removal. According to the response surface methodology analysis, the biochar prepared under the primary pyrolysis temperature of 350°C, secondary pyrolysis temperature of 450°C, secondary pyrolysis time of 60 min, and S/C ratio of 2:1 could achieve the maximum Cr removal (92%). The S-modified biochar prepared under the optimum condition exhibited greater capacity of adsorbing Cr(VI) or reducing Cr(VI) into Cr(III) compared with the biochar without the S modification. The enhanced Cr(VI) adsorption and reduction were likely because some of the sulfur-containing groups formed on the modified biochar could bind and interact with the Cr(VI). Besides, the enhanced surface area by the sulfur modification also played a role in prompting the removal and reduction of Cr(VI).

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http://hdl.handle.net/10453/176444