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Fe3O4纳米磁性微粒对钴和锶的吸附
引用本文:刘峰,杨枝,刘和连,罗新. Fe3O4纳米磁性微粒对钴和锶的吸附[J]. 核化学与放射化学, 2008, 30(1): 56-60
作者姓名:刘峰  杨枝  刘和连  罗新
作者单位:东华理工大学 应用化学系
摘    要:为降低90Sr和60Co对环境的污染,用共沉淀法制备了粒径为10 nm的Fe3O4磁性微粒,分散于水中生成饱和磁化强度(M)为350 kA/m的水基磁流体,用此磁流体对Co2+, Sr2+进行了吸附研究。结果表明,在45 ℃,吸附60 min时,Co2+, Sr2+分别在pH=7和pH=8下达到吸附平衡,吸附容量为1.794, 0.962 mmol/g。用Langmuir等温模型、假二级动力学模型探讨了Fe3O4纳米磁性微粒对Co2+, Sr2+的吸附机制,研究结果表明,该过程是单离子层吸附过程。

关 键 词:    吸附  Fe3O4纳米磁性微粒  
文章编号:0253-9950(2008)01-0056-05
修稿时间:2006-12-25

Adsorption of Cobalt and Strontium on Fe3O4 Magnetic Nanoparticles
LIU Feng,YANG Zhi,LIU He-lian,LUO Xin. Adsorption of Cobalt and Strontium on Fe3O4 Magnetic Nanoparticles[J]. Journal of Nuclear and Radiochemistry, 2008, 30(1): 56-60
Authors:LIU Feng  YANG Zhi  LIU He-lian  LUO Xin
Abstract:Adsorption is an efficiency method to decrease the pollution of 90Sr and 60Co. The adsorption behavior of cobalt and strontium on Fe3O4 magnetic nanoparticles was studied in this paper. The adsorbent applied here was prepared by co-precipitation, and can form water based ferrofluids. Its saturation magnetization is 350 kA/m. The experiments show that the Qmax of cobalt and strontium are 1.794 mmol/g and 0.962 mmol/g at pH=7 and pH=8, respectively. The adsorption process follows a pseudo second kinetics and the Langmuir isotherm, which indicates the adsorption is a monolayer adsorption. 
Keywords:cobalt  strontium  adsorption  Fe3O4magneticnanoparticles  
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