摘要
中国的水资源状况日益严峻,因此迫切需要发展水处理新技术。与传统技术相比,超导磁分离技术具有低投资、低成本等优点。磁种是利用超导磁分离法处理含非磁性污染物废水的关键材料。本文采用化学共沉淀技术制备了Fe3O4纳米颗粒,利用等离子体有机聚合法和化学植入法对磁性纳米颗粒进行表面修饰,制备出麦秸杆纤维素自组装和聚醋酸乙烯酯(PVA)覆膜两种磁种材料。X射线衍射、透射电镜微观组织分析和红外光谱分析均表明具有吸附功能的活性基团和磁性颗粒能很好地结合。对改性后纳米磁种颗粒对水中阴阳离子和有机物的吸附性能的研究证明两类磁种材料均表现出90%以上的吸附率,可以满足超导磁分离水处理的要求。
The water resources in China are becoming more and more a critical issue. New technologies for water purification are urgently required. Magnetic seeds are the key materials for treating wastewater containing non-ferromagnetic pollutants with the methods of superconducting magnetic separation. In this work,Fe3O4 nanoparticles were prepared by the co-precipitation method. In order to obtain cellulose assembled or Polyvinyl acetate （PVA） coated magnetic seeds,the nanoparticles were modified by chemical implantation or plasma surface polymerization methods on the surface. Microstructure analyses by X-ray diffraction（XRD） and Transmission Electron Microscope（TEM） and IR （Infrared spectrum） indicate that the absorptive groups can combine well with the magnetic particles. With respect to the magnetic properties of modified magnetic seeds and its absorbing dynamics for aqueous ions and organics,it is shown that both magnetic seeds enjoy over 90% of absorption rate,which can meet the demand of superconducting magnetic wastewater separation.
出处
《科技导报》
CAS
CSCD
北大核心
2011年第3期57-61,共5页
Science & Technology Review
基金
国家自然科学基金项目(50947034)
中国科学院天津专项(TJZX2-YW-18)
关键词
纳米磁种
磁分离
水处理
nano magnetic sced
magnetic separation
wastewater treatment
