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https://hdl.handle.net/2440/75301
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Type: | Journal article |
Title: | Effective removal of selenate from aqueous solutions by the Friedel phase |
Author: | Wu, Y. Chi, Y. Bai, H. Qian, G. Cao, Y. Zhou, J. Xu, Y. Liu, Q. Xu, Z. Qiao, S. |
Citation: | Journal of Hazardous Materials, 2010; 176(1-3):193-198 |
Publisher: | Elsevier Science BV |
Issue Date: | 2010 |
ISSN: | 0304-3894 1873-3336 |
Statement of Responsibility: | Yueying Wu, Ying Chi, Hongmei Bai, Guangren Qian, Yali Cao, Jizhi Zhou, Yunfeng Xu, Qiang Liu, Zhi Ping Xu, Shizhang Qiao |
Abstract: | This research has demonstrated that the Friedel phase, e.g. a chloride-containing hydrocalumite (Ca(2)Al(OH)(6)Cl(H(2)O)(2) x mH(2)O), can rapidly adsorb large amounts of SeO(4)(2-) (up to 1.37 mmol/g). SeO(4)(2-) is removed via anionic exchange, as evidenced by the expansion of the d-spacing from 0.78 nm of Cl-hydrocalumite to 0.97-0.98 nm of SeO(4)-hydrocalumite. The newly formed SeO(4)-adsorbed hydrocalumite is stable in water at pH 4-13, indicating the strong fixation of selenate within the phase. In contrast, intercalated selenate in the Freidel phase can be recovered by desorbing in the NaCl solution, which can also regenerate and recycle the used adsorbent. The findings in this research strongly suggest that the Friedel phase is a new, environmentally friendly and cost-effective adsorbent to adsorb selenate from wastewater streams and dilute solutions. |
Keywords: | Friedel phase Layered double hydroxide Selenate Fixation Hydrocalumite |
Rights: | Copyright © 2009 Elsevier B.V. All rights reserved. |
DOI: | 10.1016/j.jhazmat.2009.11.012 |
Grant ID: | ARC |
Published version: | http://dx.doi.org/10.1016/j.jhazmat.2009.11.012 |
Appears in Collections: | Aurora harvest 4 Chemical Engineering publications |
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