title: La-EDTA coated Fe3O4 nanomaterial: preparation and application in removal of phosphate from water.
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.
authors.affiliation: Department of Environmental Science & Engineering, Hunan Agricultural University, Changsha 410128, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Yang
authors.forename: Qingru
authors.initials: Q
authors.lastname: Zeng
authors.forename: Liang
authors.initials: L
authors.lastname: Peng
authors.forename: Ming
authors.initials: M
authors.lastname: Lei
authors.forename: Huijuan
authors.initials: H
authors.lastname: Song
authors.forename: Boqing
authors.initials: B
authors.lastname: Tie
authors.forename: Jidong
authors.initials: J
authors.lastname: Gu
mesh_terms: D004492:Edetic Acid / Q000737:chemistry; D052203:Ferrosoferric Oxide / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D014867:Water / Q000737:chemistry*
chemical_list: D010710:Phosphates; D014867:Water; D004492:Edetic Acid; D052203:Ferrosoferric Oxide