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La-EDTA-Fe3O4 was prepared by a chemical co-precipitation method. The magnetic composite was characterized by transmissionelectron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Furthermore, the adsorptionproperties of La-EDTA-Fe3O4 toward phosphate in water were investigated. The uptake rate of phosphate in water by La-EDTA-Fe3O4was 3–1000 times than that of EDTA-Fe3O4, and reached 97.8% at 7 hr. The adsorption process agreed well with the Freundlichmodel 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 separatedwell from aqueous solution by a permanent magnet. Therefore, this nanomaterial has potential application for the removal of phosphatefrom large water bodies.
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