Organic modification of bentonite and its application for perrhenate (an analogue of pertechnetate) removal from aqueous solution
Organic modification of bentonite and its application for perrhenate (an analogue of pertechnetate) removal from aqueous solution
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膨润土的有机改性及其在去除水溶液中高铼酸盐（高锝酸盐的类似物）中的应用
DOI：
10.1016/j.jtice.2016.01.018
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发表时间：
2016-05
影响因子：
5.7
通讯作者：
Wu Wangsuo
中科院分区：
文献类型：
--
作者：
Wang Zhipeng;Li Run;Shi Keliang;Wu Wangsuo
锝-99（99 Tc）是核工业的重要裂变产物。它的特性可以通过研究锝的化学类似物铼（Re）来预测，从而避免使用高浓度的放射性元素。研究了十六烷基三甲基铵阳离子（HDTMA）改性膨润土对铼（VII）的吸附性能。实验结果表明，膨润土样品已成功改性。随着煅烧温度的升高（<200 °C），样品中HDTMA的稳定性令人满意。Re（VII）的吸附速率较快，吸附动力学符合准二级动力学模型。热力学研究表明，低温下吸附过程更为有利。HDTMA改性膨润土对Re（VII）的吸附率较未改性膨润土有显著提高，HDTMA与Re（VII）之间的表面沉淀是HDTMA改性膨润土吸附Re（VII）的主要机理。
Technetium-99 (99Tc) is an important fission product of nuclear industry. Its characteristics can be predicted by studying rhenium (Re), a chemical analogue of technetium, thus avoiding the use of radioactive elements at high concentrations. The present work focused on the sorption of Re(VII) by hexadecyl trimethylammonium cation (HDTMA) modified bentonite. Our experimental results show that the bentonite sample has been successfully modified. The stability of HDTMA in the sample is satisfactory with the increasing of calcination temperature (<200 °C). The uptake rate of Re(VII) is relatively rapid and the sorption kinetics of Re(VII) can be successfully described by the pseudo-second-order model. Thermodynamic studies reveal that the sorption process is more favorable at low temperature. The uptake ratio of Re(VII) on HDTMA modified bentonite was enhanced significantly compared with the unmodified one, the surface precipitate between HDTMA and Re(VII) is the main mechanism for Re(VII) uptake by HDTMA modified bentonite.
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影响因子：
3.9
作者：
Hsin-Chieh Wu;Te-yen Su;T. Tsai;S. Jong;Ming-Hui Yang;Y. Tyan
通讯作者：
Hsin-Chieh Wu;Te-yen Su;T. Tsai;S. Jong;Ming-Hui Yang;Y. Tyan
影响因子：
7.4
作者：
K. Shi;J. Qiao;Wang-suo Wu;P. Roos;X. Hou
通讯作者：
K. Shi;J. Qiao;Wang-suo Wu;P. Roos;X. Hou
DOI：
10.1016/j.proenv.2012.01.207
发表时间：
2012
期刊：
Procedia environmental sciences
影响因子：
--
作者：
J. Tang;Z. F. Yang;Y. Yi
通讯作者：
J. Tang;Z. F. Yang;Y. Yi
影响因子：
11.4
作者：
Bradley Wakoff;K. L. Nagy
通讯作者：
Bradley Wakoff;K. L. Nagy
影响因子：
4
作者：
Y. Koriche;M. Darder;P. Aranda;S. Semsari;E. Ruiz-Hitzky
通讯作者：
Y. Koriche;M. Darder;P. Aranda;S. Semsari;E. Ruiz-Hitzky