Fe3O4纳米磁性微粒对钴和锶的吸附  

Adsorption of Cobalt and Strontium on Fe_3O_4 Magnetic Nanoparticles

作　　者：刘峰[1] 杨枝[1] 刘和连[1] 罗新[1] 

机构地区：[1]东华理工大学应用化学系,江西抚州344000

出　　处：《核化学与放射化学》2008年第1期56-60,共5页Journal of Nuclear and Radiochemistry

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。Adsorption is an efficiency method to decrease the pollution of ^90 Sr and ^60 Co. The adsorption behavior of cobalt and strontium on Fe3O4 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 pHi8, respectively. The adsorption process follows a pseudo-second kinetics and the Langmuir isotherm, which indicates the adsorption is a monolayer adsorption.

关 键 词：钴 锶 吸附 Fe3O4纳米磁性微粒 

分 类 号：O647.3[理学—物理化学]