Preparation and adsorption properties of magnetic chitosan composite adsorbent for Cu<sup>2+</sup> removal

Li, J; Jiang, B; Liu, Y; Qiu, C; Hu, J; Qian, G; Guo, W; Ngo, HH

Preparation and adsorption properties of magnetic chitosan composite adsorbent for Cu<sup>2+</sup> removal

Li, J Jiang, B Liu, Y Qiu, C Hu, J Qian, G Guo, W

Ngo, HH

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Publication Type:: Journal Article
Citation:: Journal of Cleaner Production, 2017, 158 pp. 51 - 58
Issue Date:: 2017-08-01

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Field	Value	Language
dc.contributor.author	Li, J	en_US
dc.contributor.author	Jiang, B	en_US
dc.contributor.author	Liu, Y	en_US
dc.contributor.author	Qiu, C	en_US
dc.contributor.author	Hu, J	en_US
dc.contributor.author	Qian, G	en_US
dc.contributor.author	Guo, W https://orcid.org/0000-0001-5542-2858	en_US
dc.contributor.author	Ngo, HH https://orcid.org/0000-0002-0296-2866	en_US
dc.date.available	2020-05-25T19:06:49Z
dc.date.issued	2017-08-01	en_US
dc.identifier.citation	Journal of Cleaner Production, 2017, 158 pp. 51 - 58	en_US
dc.identifier.issn	0959-6526	en_US
dc.identifier.uri	http://hdl.handle.net/10453/107632
dc.description.abstract	© 2017 Elsevier Ltd Water pollution caused by Cu2+ ions poses a significant threat to the ecosystem and human health, hence the development of highly cost-effective, highly operation-convenient and highly efficient natural polymer-based adsorbents is urgently needed. To overcome this serious problem, a novel cost-effective magnetic chitosan composite adsorbent (CsFeAC) was prepared with magnetic macroparticles and highly porous activated carbon carrier using the sol-gel method. Several methods, namely SEM, BET, FTIR, XRD, TGA and VSM, were applied to characterize the adsorbent. Batch tests were conducted to investigate Cu2+ adsorption properties of CsFeAC at different pH values, contact time, initial Cu2+ concentrations and temperatures. The adsorption fits better to the Langmuir isotherm and follows the pseudo-second-order model, suggesting that it is a monolayer adsorption and the rate-limiting step is the chemical chelating reaction. The saturated adsorption capacity is found to be 216.6 mg/g. Thermodynamics analysis suggests that the adsorption process is endothermic, with increasing entropy and spontaneous in nature. BET and XRD tests confirm that the higher specific surface area and lower crystallinity of CsFeAC significantly improve the absorption capacity and rate. FTIR spectra reveal that the amino and hydroxyl groups play an important role in the chelating adsorption. The supermagnetic property of CsFeAC facilitates its easy separation characteristic. Further recycling experiments show that CsFeAC still retains 95% of the original adsorption following the 5th adsorption-desorption cycle. All these results demonstrate that CsFeAC is a promising recyclable adsorbent for removing Cu2+.	en_US
dc.relation.ispartof	Journal of Cleaner Production	en_US
dc.relation.isbasedon	10.1016/j.jclepro.2017.04.156	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.title	Preparation and adsorption properties of magnetic chitosan composite adsorbent for Cu<sup>2+</sup> removal	en_US
dc.type	Journal Article
utslib.citation.volume	158	en_US
utslib.for	0907 Environmental Engineering	en_US
utslib.for	0910 Manufacturing Engineering	en_US
utslib.for	0915 Interdisciplinary Engineering	en_US
pubs.embargo.period	Not known	en_US
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	open_access
pubs.publication-status	Published	en_US
pubs.volume	158	en_US

Abstract:

© 2017 Elsevier Ltd Water pollution caused by Cu2+ ions poses a significant threat to the ecosystem and human health, hence the development of highly cost-effective, highly operation-convenient and highly efficient natural polymer-based adsorbents is urgently needed. To overcome this serious problem, a novel cost-effective magnetic chitosan composite adsorbent (CsFeAC) was prepared with magnetic macroparticles and highly porous activated carbon carrier using the sol-gel method. Several methods, namely SEM, BET, FTIR, XRD, TGA and VSM, were applied to characterize the adsorbent. Batch tests were conducted to investigate Cu2+ adsorption properties of CsFeAC at different pH values, contact time, initial Cu2+ concentrations and temperatures. The adsorption fits better to the Langmuir isotherm and follows the pseudo-second-order model, suggesting that it is a monolayer adsorption and the rate-limiting step is the chemical chelating reaction. The saturated adsorption capacity is found to be 216.6 mg/g. Thermodynamics analysis suggests that the adsorption process is endothermic, with increasing entropy and spontaneous in nature. BET and XRD tests confirm that the higher specific surface area and lower crystallinity of CsFeAC significantly improve the absorption capacity and rate. FTIR spectra reveal that the amino and hydroxyl groups play an important role in the chelating adsorption. The supermagnetic property of CsFeAC facilitates its easy separation characteristic. Further recycling experiments show that CsFeAC still retains 95% of the original adsorption following the 5th adsorption-desorption cycle. All these results demonstrate that CsFeAC is a promising recyclable adsorbent for removing Cu2+.

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http://hdl.handle.net/10453/107632