Eutrophication has become a worldwide environmental problem and removing phosphorus from water/wastewater before discharge is essential. The purpose of our present study was to develop an efficient material in terms of both phosphate adsorption capacity and magnetic separability. To this end, we first compared the performances of four spinel ferrites, including magnesium, zinc, nickel and copper ferrites. Then we developed a copper ferrite–based novel magnetic adsorbent, by synthesizing 1,6-hexamethylenediamine–functionalized copper ferrite(CuFe₂O₄) via a single solvothermal synthesis process followed by LaCl₃ treatment. The materials were characterized with X-ray diffraction, transmission electron microscope, vibrating sample magnetometer, Fourier transform infrared spectra and N₂ adsorption–desorption. The maximum adsorption capacity of our material, calculated from the Langmuir adsorption isotherm model, attained 32.59 mg/g with a saturation magnetization of 31.32 emu/g. Data of adsorption kinetics were fitted well to the psuedo–second-order model. Effects of solution pH and coexisting anions (Cl⁻, NO₃⁻, SO₄^2 −) on phosphate adsorption were also investigated, showing that our material had good selectivity for phosphate. But OH^– competed efficiently with phosphate for adsorption sites. Furthermore, increasing both NaOH concentration and temperature resulted in an enhancement of desorption efficiency. Thus NaOH solution could be used to desorb phosphate adsorbed on the material for reuse, by adopting a high NaOH concentration and/or a high temperature.

富营养化已经成为世界范围内的环境问题，必须在排放前从水/废水中去除磷。我们当前研究的目的是开发一种在磷酸盐吸附能力和磁分离性方面均有效的材料。为此，我们首先比较了四种尖晶石铁氧体的性能，包括镁，锌，镍和铜铁氧体。然后，我们通过一个溶剂热合成方法，然后是LaCl ₃合成了1,6-六亚甲基二胺官能化的铜铁氧体（CuFe ₂ O ₄），从而开发了一种基于铁氧体铜的新型磁吸附剂。治疗。通过X射线衍射，透射电子显微镜，振动样品磁力计，傅立叶变换红外光谱和N ₂吸附-脱附对材料进行了表征。根据Langmuir吸附等温线模型计算，我们材料的最大吸附容量达到32.59 mg / g，饱和磁化强度为31.32 emu / g。吸附动力学数据很好地拟合了伪二级模型。溶液pH值的影响，并共存阴离子（氯^-，NO ₃ ^-，SO ₄ ^{2 - ）}上的磷酸吸附也进行了研究，显示出我们的材料具有对磷酸盐良好的选择性。但是哦^–与磷酸盐有效竞争吸附位点。此外，增加NaOH浓度和温度均导致解吸效率的提高。因此，通过采用高NaOH浓度和/或高温，NaOH溶液可用于解吸吸附在材料上的磷酸盐以再利用。