La-EDTA coated Fe3O4 nanomaterial: Preparation and application in removal of phosphate from water

La-EDTA-Fe3O4 was prepared by a chemical co-precipitation method. The magnetic composite was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Furthermore, the adsorption properties of La-EDTA-Fe3O4 toward phosphate...

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Bibliographic Details
Published in:Journal of environmental sciences (China) 2013-02, Vol.25 (2), p.413-418
Main Authors: Yang, Jiao, Zeng, Qingru, Peng, Liang, Lei, Ming, Song, Huijuan, Tie, Boqing, Gu, Jidong
Format: Article
Language:English
Subjects:
Adsorption
Edetic Acid - chemistry
Ferrosoferric Oxide - chemistry
Fourier transforms
Infrared spectroscopy
La-EDTA-Fe3O4
magnetic materials
Nanocomposites
Nanomaterials
Nanostructure
Nanostructures - chemistry
phosphate
Phosphates
Phosphates - chemistry
Reaction kinetics
Water - chemistry
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Summary:La-EDTA-Fe3O4 was prepared by a chemical co-precipitation method. The magnetic composite was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Furthermore, the adsorption properties of La-EDTA-Fe3O4 toward phosphate in water were investigated. The uptake rate of phosphate in water by La-EDTA-Fe3O4 was 3-1000 times than that of EDTA-Fe3O4, and reached 97.8% at 7 hr. The adsorption process agreed well with the Freundlich model and kinetics studies showed that the adsorption of phosphate proceeds according to pseudo second-order adsorption kinetics. The maximum removal rate was achieved at pH 6.0–7.0. The La-EDTA-Fe3O4 had good adsorption properties and could be separated well from aqueous solution by a permanent magnet. Therefore, this nanomaterial has potential application for the removal of phosphate from large water bodies.
ISSN:1001-0742
1878-7320
DOI:10.1016/S1001-0742(12)60014-X