Study on sorption of U(VI) onto ordered mesoporous silicas
Study on sorption of U(VI) onto ordered mesoporous silicas
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有序介孔二氧化硅吸附U(VI)的研究
DOI：
10.1007/s10967-012-1998-1
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发表时间：
2013-02
影响因子：
1.6
通讯作者：
Song, Li-Juan
中科院分区：
文献类型：
--
作者：
Chen, Su-Wen;Guo, Bo-Long;Wang, Yu-Long;Li, Yuan;Song, Li-Juan
采用水热法合成了介孔分子筛MCM-41和MCM-48，并对其进行了XRD和BET表征。采用间歇吸附法研究了介孔氧化硅在常温下对水溶液中U（VI）的吸附性能。实验结果表明，U（VI）在MCM-41和MCM-48上的吸附与溶液的pH值密切相关，而与离子强度无关。与Langmuir模型相比，Freundlich模型具有较高的相关系数，能较好地拟合吸附等温线。由298、318和338 K的温度分别计算了Langmuir和Freundlich吸附等温线的参数，结果表明U（VI）在MCM-41和MCM-48上的吸附是一个自发的放热过程。与其对U（VI）的吸附能力相比，MCM-48是从大体积水溶液中预富集U（VI）的合适材料。
The mesoporous silicas (MCM-41 and MCM-48) are synthesized by hydrothermal method, which are characterized by XRD and BET techniques. The application of mesoporous silicas for the sorption of U(VI) from aqueous solution are studied by using batch technique under ambient condition. The effects of contact time, solid-to-liquid ratio (m/V), solution pH, ionic strength and temperature are determined, and the results indicate that the sorption of U(VI) to MCM-41 or MCM-48 are strongly dependent on pH values but independent of ionic strength. Compared with Langmuir model, the sorption isotherms can be simulated by Freundlich model well according to the high relative coefficients. The parameters for Langmuir and Freundlich sorption isotherms are calculated from the temperature at 298, 318 and 338 K, respectively, and the results suggest that the sorption of U(VI) on MCM-41 or MCM-48 is a spontaneous and exothermic process. In contrast to its sorption capacity for U(VI), MCM-48 is a suitable material for the preconcentration of U(VI) from large volumes of aqueous solutions.
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影响因子：
15.1
作者：
Zhao, Donglin;Yang, Xin;Wang, Xiangke
通讯作者：
Wang, Xiangke
影响因子：
1.6
作者：
Baowei Hu;W. Cheng;Hui Zhang;G. Sheng
通讯作者：
Baowei Hu;W. Cheng;Hui Zhang;G. Sheng
DOI：
10.1524/ract.1999.84.1.37
发表时间：
1999
期刊：
--
影响因子：
--
作者：
Y. Shin;M. C. Burleigh;S. Dai;C. Barnes;Z. Xue
通讯作者：
Y. Shin;M. C. Burleigh;S. Dai;C. Barnes;Z. Xue
影响因子：
1.6
作者：
Hui Zhang;Xian-jin Yu;Lei Chen;Jia-Zhen Geng
通讯作者：
Hui Zhang;Xian-jin Yu;Lei Chen;Jia-Zhen Geng
温度对钠膨润土吸附 U(VI) 的影响
影响因子：
1.8
作者：
Lei Huang;Gilles Montavon;Yan Lu;Wangsuo Wu;Zhijun Guo;Ziqian Yang
通讯作者：
Ziqian Yang