期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 209, 期 -, 页码 193-198出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2012.01.011
关键词
Nano-Fe3O4; Rhodamine B; Nanostructure; Separations; Adsorption; Interface
资金
- National Natural Science Foundation of China [21007014, 21107024]
- Start Foundation of Hunan Agricultural University [10YJ01]
- National Science and Technology Major Projects [2009ZX07212-001-05]
- National Environmental Protection Public Welfare Program [201009047]
- Key Laboratory of Production Environment
- Agro-product Safety of Ministry of Agriculture, Tianjin Key Laboratory of Agro-environment and Food Safety [2010-KJ-KF-03]
- Scientific Research Fund of Hunan Provincial Education Department [11C0650]
Humic acid (HA) modifying Fe3O4 nanoparticles (Fe3O4/HA) was developed for removal of Rhodamine B from water. Fe3O4/HA was prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TEM images revealed the Fe3O4/HA (with similar to 10 nm Fe3O4 cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2 emu/g, the Fe3O4/HA could be simply recovered from water with magnetic separations at low magnetic field gradients within a few minutes. Sorption of the Rhodamine B to Fe3O4/HA reached equilibrium in less than 15 min, and agreed well to the Langmuir adsorption model with maximum adsorption capacities of 161.8 mg/g. The Fe3O4/HA was able to remove over 98.5% of Rhodamin B in water at optimized pH. (C) 2012 Elsevier B.V. All rights reserved.
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