接枝功能化磁性纳米粒子去除饮用水中Cu2+研究

Study on removing copper(Ⅱ) based on graft functionalized magnetic nanoparticles in drinking water

采用水热法制备Fe3O4磁性纳米微粒子,使用3-(异丁烯酰氧)丙基三甲氧基硅烷(KH570)对Fe3O4微粒进行接枝表面修饰.对合成的磁性Fe3O4微粒进行了表征,通过透射电子显微镜观察微粒形态.利用制备的功能性磁性纳米粒子检测水中的铜离子.研究结果表明,Fe3O4磁性纳米粒子呈现规则球型,Fe3O4纳米粒子和功能化的Fe3O4纳米粒子磁饱和强度值(M)分别为89 emu·g-1和52emu·g-1.最佳去除体系即为加入量25 mg/m L,反应温度30℃,反应时间10 min,在此条件下,水中铜离子的去除量为最佳为45μmol/g.

In this paper, Fe3O4 magnetic particles with micron size were prepared by hydrothermal method,and used 3-( isobutenyloxy) methacryloxpropyl trimethoxy silane( KH570) surface-modification of Fe3O4. Synthetic magnetic Fe3O4 particles were characterized,and the morphology of the particles was observed by a transmission electron microscope. The prepared functional magnetic nanoparticles were used to detect copper ions in water. The results showed that the magnetic nanoparticles of Fe3O4 were regular spheres.Saturated magnetic intensity values( M) of Fe3O4 nanoparticles and functionalized Fe3O4 nanoparticles were 89 emu·g-1 and 56 emu·g-1,respectively. The removal rate of copper ion in water was the best when the addition amount was 0. 5 m L,the reaction temperature was 30 ℃ and the reaction time was 10 min. Under this condition,the removal of copper ions in water was optimally 45 μmol/g.