Journal
CHEMICAL ENGINEERING JOURNAL
Volume 262, Issue -, Pages 313-318Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2014.09.094
Keywords
Magnetic nanoparticles; Poly-lysine; Adsorption; Anionic dyes
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Funding
- National Basic Research Program of China [2010CB933504]
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This work describes the synthesis and adsorption behavior of Fe3O4 magnetic nanoparticles (MNPs) modified with 3-glycidoxypropyltrimethoxysilane (GPTMS) and poly-lysine (P-Lys). The magnetic nanoparticles were characterized by infra-red spectra, transmission electron microscopy, X-ray diffraction, thermogravimetric analysis and X-ray photoelectron spectroscopy. To understand the adsorption mechanism of the MNPs, we investigated anionic dye uptake capacity of Fe3O4@GPTMS@P-Lys as a function of contact time, dye concentration and pH. The MNPs could effectively remove anionic dyes including methyl blue (MB), orange I (OR-I), amaranth (AM) and acid red 18 (AR-18) from water solution. Furthermore, the improved adsorbent showed convenient separation and efficient reusability, and enhanced the adsorption capacity for anionic dyes. (C) 2014 Elsevier B.V. All rights reserved.
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