摘要
采用水相共沉淀法制备小尺寸磁性Fe3O4纳米颗粒,以没食子酸作为还原剂和表面修饰剂,还原Ag[(NH3)2]+制备出Fe3O4/Ag磁性纳米颗粒。研究该磁性纳米颗粒对水溶液中铅离子的吸附行为,研究结果表明,pH为7.0,吸附温度30℃时可得到最好的处理效果,铅的去除率可达99.7%以上,Fe3O4/Ag颗粒吸附行为符合二级动力学模型(R2>0.99)。该磁性纳米颗粒经过多次再生处理后,仍具有很好的吸附效果,表明Fe3O4/Ag在水处理方面拥有良好的应用前景。
Small size Fe3O4 magnetic nanoparticles were prepared by aqueous phase coprecipitation and then the Fe3 O4/Ag core-shell nanoparticles were synthesized by reducing Ag[ （NH3 ）2 ] ＋ with gallic acid as re- ducer and surface modifier. The absorption behavior of lead ions of the nanoparticles in aqueous solution was studied. The results showed that the optimized condition of pH for metal ions removal was 7. 0 while the temper- ature was 30℃. The removal efficiency of lead was above 99.7% and the absorption kinetics for Pb2＋ was agree with the second order model （R2 〉 0.99）. Furthmore, the Fe3 O4/Ag nanoparticles could be well reusable after being regenerated, indicating that Fe3Og/Ag nanoparticles had a good prospect in water treatment.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第11期4178-4184,共7页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(51278253
21177061)
中央高校基本科研业务费专项资金项目(30920130122007)
化工污染控制与资源化江苏省高校重点实验室开放基金项目
江苏省环保厅研究课题(2013002)
江苏省"青蓝工程"项目
江苏经贸职业技术学院重大课题(JMZ1201210)
