核化学与放射化学2009，Vol.31Issue(4)：230-236,7.
蛭石和蒙脱石对Sr的吸附性能
Adsorption of Strontium by Vermiculite and Montmorillonite
冯悦 1李兵 1廖家莉 1张东 2赵军 2伍姣姣 1文炜 1杨远友 2刘宁1
作者信息
- 1. 四川大学,原子核科学技术研究所,辐射物理及技术教育部重点实验室,四川,成都,610064
- 2. 中国工程物理研究院,核物理与化学研究所,四川,绵阳,621900
- 折叠
摘要
Abstract
The adsorption of Sr~(2+) by vermiculite and montmorillonite and the effects of experimental conditions were investigated. The results show that more than 96.8% and 98.5% of the total Sr~(2+)can be adsorbed by the vermiculite and montmorillonite from pH=8 Sr~(2+) solution of 20 MBq/L (C_0) at room temperature, respectively. The equilibrium of adsorption by vermiculite and montmorillonite was achieved within 2 h and 15 min severally, and the optimum pH both ranged from 3 to 10. More than 82.7% and 98.7% Sr~(2+) can be desorbed by 2 mol/L HNO_3 solution from the vermiculite and montmorillonite.The adsorption rate of Sr~(2+) by vermiculite and montmorillonite will decrease in presence of coexistent Ca2+, while modified by [Ag(NH_3)_2]~+ and 1 mol/L HCl can improve the adsorption abilities of vermiculite for Sr~(2+),but decreased by high temperature.As for montmorillonite, modified by [Cu(NH_3)_4]~(2+) can improve adsorption, however, by [Ag(NH_3)_2]~+ and high temperature can decrease. Additionally, the modified vermiculite and montmorillonite were analyzed by X-ray diffractometer system (XRD). The results show that the spectra of the modified vermiculite or montmorillonite are different from that of the original one.关键词
蛭石/蒙脱石/Sr~(2+)/吸附Key words
vermiculite/ montmorillonite/ Sr~(2+)/ adsorption分类
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冯悦,李兵,廖家莉,张东,赵军,伍姣姣,文炜,杨远友,刘宁..蛭石和蒙脱石对Sr的吸附性能[J].核化学与放射化学,2009,31(4):230-236,7.
