期刊
APPLIED SURFACE SCIENCE
卷 317, 期 -, 页码 1028-1034出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2014.09.033
关键词
Mercury(II) removal; Cysteine modified; Fe3O4 nanoparticles; Magnetic separation
类别
资金
- State Key Laboratory of Dairy Biotechnology, Bright Dairy Food Co. Ltd. [SKLDB2013-03]
- Natural Science Foundation of Jiangsu Province [BK2012107]
- National Natural Science Foundation of China [21005032]
Cysteine functionalized Fe3O4 magnetic nanoparticles (Cys-Fe3O4 MNPs) were prepared facilely for Hg(II) removal from aqueous solutions. Using Fe2+ as precursors, air as oxidant and Cys as protectant, this novel material was one-pot synthesis at room temperature by oxidation-precipitation method with the assistance of sonication. The MNPs were characterized by TEM, VSM, FTIR, X-ray powder diffraction analysis (XRD) and TGA methods. Under the optimum experimental conditions, the removal efficiency was as high as 95% and the maximum sorption capacity is found to be 380 mg/mol for Hg(II). Study on adsorption kinetics shows that adsorption of Hg(II) onto Cys-Fe3O4 MNPs follows pseudo-first-order kinetic model and the adsorption rate constant was 0.22 min-1. Additionally, the Hg(II)-loaded Cys-Fe3O4 MNPs could be easily regenerated up to 95% using 1.0 M acetic acid. These results indicated that Cys-Fe3O4 MNPs is a potentially attractive material for the removal of Hg(II) from water. (C) 2014 Elsevier B.V. All rights reserved.
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