功能化Fe_3O_4对水中亚甲基蓝染料的吸附性能研究

The Study on the Adsorption of Methylene Blue Dye from Water by Functional Fe_3O_4

通过共沉淀法制备了磁性Fe_3O_4纳米粒子,并将其表面包覆二氧化硅外壳,制备了性质稳定,脱色性能较好,同时易于固液分离的功能化磁性纳米粒子.以模拟印染废水的脱色为目标,研究了pH、温度、吸附时间等因素对脱色效果的影响.研究结果表明,磁性吸附剂制备成本低,对亚甲基蓝溶液的脱色效率显著.

The magnetic nanoparticles were prepared by co-precipitation and the received Fe3O4 were coated by silica on the surface. The functional magnetic nanoparticles （Fe3O4@ SiO2 ） have many advantages, such as chemical stability, strong adsorption and especially excellent recycling capability. The ability of Fe3O4@ SiO2 to remove dye from aqueous solutions has been carried out as function of solution pH, temperature, and contact time. The results show that Fe3O4 @ SiO2 magnetic nanoparticles would be as low-cost and effective adsorbents for removal of methylene blue from wastewater.