期刊
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
卷 20, 期 5, 页码 3543-3549出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2013.12.047
关键词
Magnetite nanoparticles; Pb(II); Cr(III); Mechanism; Characterization
资金
- Fujian Minjiang Fellowship from Fujian Normal University
This study concerns the removal of Pb(II) and Cr(III) using magnetite nanoparticles synthesized by co-precipitation methods with (NCM) or without (CM) nitrogen gas passing through. Removal of Pb(II) significantly decreased from 80.56 to 41.41% when Cr(III) was co-presented, while decrease of Cr(III) was negligible when Pb(II) was present, falling from 42.37 to 38.48%. The characterizations indicated that the removal mechanism occurred through adsorption rather than chemical redox reaction. A co-adsorption mechanism is based on Pb(II) involved surface complexation, while Cr(III) was firstly adsorbed onto magnetite, followed by a partially substitution of Cr(III) for Fe(III) in Cr-Fe3O4 through ion exchanges. (C) 2013 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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