文献类型：期刊文献

英文题名：Microscopic insights into the temperature-dependent adsorption of Eu(III) onto titanate nanotubes studied by FTIR, XPS, XAFS and batch technique

作者：Sheng, Guodong[1,2];Dong, Huaping[1];Shen, Runpu[1];Li, Yimin[1]

机构：[1]Shaoxing Univ, Sch Chem & Chem Engn, Shaoxing 312000, Zhejiang, Peoples R China;[2]Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Peoples R China

年份：2013

卷号：217

起止页码：486

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：SCI-EXPANDED(收录号：WOS:000316835600055)、、EI(收录号：20130816038562)、Scopus(收录号：2-s2.0-84873748128)、WOS

基金：Financial supports from the National Natural Science Foundation of China (21207092, 21177088, 21176156, 21001002, 20907055, 21071147, 20971126), the Natural Science Foundation of Zhejiang Province (LY12B06003), Zhejiang Science and Technology Projects (2011C31034), 973 project (2011CB933700), the Knowledge Innovation Program of CAS and Special Foundation for High-level Waste Disposal (2007-840) are greatly acknowledged. The authors also gratefully acknowledge Prof. Yuying Huang and his co-workers (SSRF, China) for helpful technical assistance of EXAFS experiment determination and analysis.

语种：英文

外文关键词：Eu(III); Titanate nanotubes; Spectroscopic technique; Interaction mechanism; Microstructure

外文摘要：This work investigated the effects of reaction temperature on Eu(III) interaction mechanism and microstructure at the titanate nanotubes (TNTs)/water interface by batch and spectroscopic (FTIR, XPS, XAFS) technique. Batch adsorption results showed that the adsorption of Eu(III) onto TNTs is promoted at higher temperature, and is an endothermic and spontaneous interfacial process. The adsorption isotherms at three different temperatures can be described by the Freundlich model better than the Langmuir model did. The spectroscopic analysis results suggested that Eu(III) interaction with TNTs is mainly controlled by outer-sphere surface complexation at T = 293 K, which is a reversible adsorption process, whereas Eu(III) interaction is mainly controlled by inner-sphere surface complexation at T = 313 K and T = 343 K, which is an irreversible adsorption process. The findings in this work can help us to better understand the physicochemical behavior of Eu(III) and related radionuclides in natural environment. The results of this work also show the great potential importance of TNTs as novel nanomaterials in the near future of nuclear waste management. (C) 2012 Elsevier B.V. All rights reserved.