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La-EDTA coated Fe3O4 nanomaterial: Preparation and application in removal of phosphate from water |
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| Authors: | Jiao Yang Qingru Zeng Liang Peng Ming Lei Huijuan Song Boqing Tie and Jidong Gu |
| Institution: | 1. Department of Environmental Science(&)Engineering, Hunan Agricultural University, Changsha 410128, China 2. Department of Environmental Science(&)Engineering, Hunan Agricultural University, Changsha 410128, China;School of Metallurgical Science and Technology, Central South University, Changsha 410083, China 3. Hunan Perochemical Vocational Technology College, Yueyang 414012, China |
| Abstract: | 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. |
| Keywords: | La-EDTA-Fe3O4 phosphate magnetic materials |
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