期刊
JOURNAL OF MOLECULAR LIQUIDS
卷 209, 期 -, 页码 508-514出版社
ELSEVIER
DOI: 10.1016/j.molliq.2015.06.022
关键词
Sequestration; Magnetic graphene oxides; Fe3O4; Radionuclides; Mechanism
资金
- Foundation of Anhui Vocational and Technical College [2014zrkx08]
The adsorption of Sr(II) and Cs(I) on magnetic graphene oxides was investigated by batch techniques. The adsorption kinetics indicated that adsorption of Sr(II) and Cs(l) on magnetic graphene oxides can be satisfactorily fitted by pseudo-second-order kinetic model. The adsorption of Sr(II) and Cs(I) on magnetic graphene oxides increased with increasing pH from 2.0 to 6.0, then high level adsorption of Sr(II) and Cs(I) was observed at pH > 6.0. The maximum adsorption capacity of magnetic graphene oxides calculated from Langmuir model at pH 4.0 and 293 K was 14.706 and 9259 mg/g for Sr(II) and Cs(I), respectively. The thermodynamic parameters showed that the adsorption of Sr(II) and Cs(I) on magnetic graphene oxides was an exothermic and spontaneous process. According to surface complexation modeling, the adsorption mechanism of Sr(II) and Cs( I) on magnetic graphene oxides was cation exchange, whereas the inner-sphere surface complexation dominated the sorption mechanism of Sr(II) and Cs(I) on magnetic graphene oxides. The finding suggested that magnetic graphene oxides can be one of the promising adsorbents for the immobilization and preconcentration of radionuclides from aqueous solutions in environmental cleanup. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据