Effective removal of zinc (II) from aqueous solutions by tricalcium aluminate (C3A)

Wang, Tianqi, Zhang, Ping, Wu, Daishe, Sun, Mingzhe, Deng, Yuheng, & Frost, Ray L. (2015) Effective removal of zinc (II) from aqueous solutions by tricalcium aluminate (C3A). Journal of Colloid and Interface Science, 443, pp. 65-71.

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Recently, studies have identified high zinc levels in various environmental resources, and excessive intake of zinc has long been considered to be harmful to human health. The aim of this research was to investigate the effectiveness of tricalcium aluminate (C3A) as a removal agent of zinc from aqueous solution. Inductively coupled plasma-atomic emission spectrometer (ICP-AES), X-ray diffraction (XRD) and scanning electron microscopy (SEM) have been used to characterize such removal behavior. The effects of various factors such as pH influence, temperature and contact time were investigated. The adsorption capacity of C3A for Zn2+ was computed to be up to 13.73 mmol g−1, and the highest zinc removal capacity was obtained when the initial pH of Zn(NO3)2 solution was between 6.0 and 7.0, with temperature around 308 K. The XRD analysis showed that the resultant products were ZnAl-LDHs. Combined with the analysis of solution component, it was proved the existence of both precipitation and cation exchange in the removal process. From the experimental results, it was clear that C3A could be potentially used as a cost-effective material for the removal of zinc in aqueous environment.

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ID Code: 83753
Item Type: Journal Article
Refereed: Yes
Keywords: Cation exchange, Precipitation, Removal, Tricalcium aluminate (C(3)A), Zinc
DOI: 10.1016/j.jcis.2014.11.046
ISSN: 0021-9797
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2015 Elsevier Inc.
Copyright Statement: Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Deposited On: 27 Apr 2015 00:33
Last Modified: 02 Nov 2015 18:10

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