| The situation of water pollution is serious,and the number and variety of refractory organics that enter the water are increasing rapidly,causing serious pollution of water resources.Among them,antibiotic pollution and dye pollution are more serious pollution in water pollution.In sewage treatment,magnetic nanomaterials not only has strong adsorption ability of organic pollutants,and because of its magnetic response characteristics can be efficient recycling,easy to use,avoid the secondary pollution of water bodies.Two magnetic adsorption materials were prepared by magnetic Fe3O4 granules,and the adsorption properties were studied.Magnetic Fe3O4 particles were prepared in this paper.With the method of Hummer,the oxidation of graphene(GO)was prepared.Fe3O4@TiO2@GO particles were synthesized by hydrothermal method.Fe3O4-ZnO-Al2O3 composite was prepared by coprecipitation.The two materials were characterized by scanning electron microscope(SEM),X-ray diffraction(XRD)test,and BET test,and the adsorption performance was studied.Fe3O4@TiO2@GO particles have superparamagnetism,with a surface area of 17.874 m2/g.Fe3O4@TiO2@GO materials for maximum of oxytetracycline hydrochloride is 29.12 mg/g,about 60 min to reach adsorption equilibrium,pH value of 4 for the most appropriate reaction conditions,in line with the Langmuir adsorption isotherm adsorption process model and dynamic model of the secondary.Fe3O4@TiO2@GO material was used in the fourth cycle using the adsorption retention rate of 88.5%.The material of Fe3O4-ZnO-Al2O3 has superparamagnetism,with a surface area of 71.366 m2/g.Fe3O4-ZnO-Al2O3 materials for maximum of methyl orange was 81.26 mg/g,around 120 min to reach adsorption equilibrium,the pH value is 5～7 as most appropriate adsorption conditions,in line with the Langmuir adsorption isotherm adsorption process model and the secondary dynamic model.After four sorption-desorption cycles,the adsorption of the methyl orange(MO)could still reach 93%. |
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