CIESC Journal

• 资源与环境工程 • 上一篇    下一篇

羧甲基化壳聚糖修饰磁性Fe3O4纳米粒子去除Cu(Ⅱ)离子

程昌敬,左 芳,吴莉莉   

  1. 西南民族大学化学与环境保护工程学院,四川 成都 610041
  • 出版日期:2011-11-05 发布日期:2011-11-21

Removal of Cu(Ⅱ) ions by carboxymethylated-chitosan modified magnetic Fe3O4 nanoparticles

CHENG Changjing,ZUO Fang,WU Lili   

  1. School of Chemistry and Environment Protection Engineering,Southwest University for Nationalities,Chengdu 610041,Sichuan,China
  • Online:2011-11-05 Published:2011-11-21

摘要:

采用化学共沉淀法制备磁性Fe3O4纳米粒子,通过在磁性Fe3O4纳米粒子表面接枝高脱乙酰度羧甲基化壳聚糖(CMC),制备了一种新型磁性纳米吸附剂。通过透射电镜、红外光谱、X射线衍射、振动样品磁强计对其进行了表征,着重研究其对Cu()离子的吸附性能。结果表明:溶液pH值能显著影响吸附剂对Cu()的吸附效果,pH值为5时其效果最佳。等温吸附数据符合Langmuir 模型,T298 KpH5V5 mL时,吸附剂的饱和吸附容量qm高达71.43 mg/g,吸附常数为0.0543 L/mg

Abstract:

A novel magnetic nano-adsorbent was prepared by covalent binding of high-deacetylated-degree carboxymethylated chitosan onto the surface of magnetic Fe3O4 nanoparticleswhich were fabricated by a chemical coprecipitation method. The adsorbent was characterized by transmission electron microscopyTEM),Fourier transform infrared spectroscopyFT-IR),X-ray diffraction patternsXRD),and vibrating sample magnetometerVSM. Moreoverthe adsorption property of the magnetic nano-adsorbent for Cu() ions was also investigated. The results showed that the adsorption capability was significantly affected by pHand the adsorption capacity was the best at pH=5. The adsorption data obeyed the Langmuir equation with a maximum adsorption capacity of 71.43 mg/g and a Langmuir adsorption equilibrium constant of 0.0543 L/mg.