Preparation Of Novel Magnetic Nanocomposites And Their Adsorption Properties For Dyes And Rare Earth Ions

With the rapid development of industry,more and more pollutants are directly discharged into the rivers and endanger the human health.Therefore,many technologies are used to deal with pollutants in water,such as flocculation,photocatalytic degradation,ion exchange and adsorption.Among all of the methods,adsorption has increasingly received much attention because of its high efficiency,simple operation,and environmental friendliness.As an important family of advanced nanomaterials,magnetic nanomaterials combining magnetic separation and nanotechnology would show good performance in pollution removal.The main contents of this work are as follows:?1?A new type of poly?itaconic acid?-grafted magnetite sepiolite composite?PIA-MSEPs?was prepared based on the green conception?bio-derived materials,green synthetic method and green using process?,in which sepiolite and itaconic acid both from green source were choosed as the main functional materials.The magnetite sepiolite?MSEP?was first prepared by a co-precipitation method,and then modified with polyitaconic acid,that the whole process was non-polluted and non-organic solvent.The results show that the PIA-MSEPs display fast adsorption,high adsorption capacity,and excellent reusability for both organic dyes and rare earth.?2?L-tyrosine modified Fe₃O₄ nanoparticles?TMNPs?are prepared by a facile ultrasound assisted solution route.Methylene blue?MB?and methyl orange?MO?,typical cationic and anionic dye,respectively,are chosen for study on adsorption properties of the magnetic nanoparticles.The maximum adsorption capacity can be reached 333.33 mg·g^-1 and 294.12 mg·g^-1 for MB and MO,respectively.In the light of effortless separation,high adsorption capacities,and excellent reusability,the as-prepared TMNPs could be a promising adsorbent for wastewater treatment in the future.