文献类型：期刊文献

英文题名：Environmental condition effects on radionuclide Cu-64(II) sequestration to a novel composite: polyaniline grafted multiwalled carbon nanotubes

作者：Sheng, Guodong[1,2];Li, Yimin[2];Dong, Huaping[2];Shao, Dadong[1]

机构：[1]Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China;[2]Shaoxing Univ, Coll Chem & Chem Engn, Shaoxing 312000, Peoples R China

年份：2012

卷号：293

期号：3

起止页码：797

外文期刊名：JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000307405800012)、、WOS

基金：Financial supports from the National Natural Science Foundation of China (20907055; 20971126), 973 project (2007CB936602), the Knowledge Innovation Program of CAS and Special Foundation for High-level Waste Disposal (2007-840) are acknowledged.

语种：英文

外文关键词：MWCNTs/PANI; Cu-64(II); Sorption; NOM; Thermodynamic data

外文摘要：This work examines the sequestration of Cu-64(II) by sorption process onto plasma-induced polyaniline (PANI)-grafted multiwalled carbon nanotubes (denoted as MWCNTs/PANI) prepared by an plasma-induced grafting technique. The role of a variety of environmental conditions such as pH, ionic strength, natural organic matter (NOM) in the sorption of Cu-64(II) onto MWCNTs/PANI is studied. The results indicate that the sorption is strongly dependent on pH but independent of ionic strength. A positive effect of NOM on Cu-64(II) sorption is found at pH < 7.5, whereas a negative effect is observed at pH > 7.5. The sorption isotherms in the absence and presence of NOM can be better described by Freundlich model than Langmuir model. Sorption isotherms of Cu-64(II) at higher initial NOM concentrations are higher than those at lower NOM concentrations. The thermodynamic data calculated from temperature-dependent sorption suggest that the sorption is spontaneous and enhanced at higher temperature. Results of this work suggest that MWCNTs/PANI may be a promising candidate for cost-effective treatments of Cu-64(II)-contaminated wastewaters.