文献类型：期刊文献

英文题名：Role of solution chemistry on the trapping of radionuclide Th(IV) using titanate nanotubes as an efficient adsorbent

作者：Sheng, Guodong[1,2,3];Hu, Baowei[1,2]

机构：[1]Shaoxing Univ, Sch Life Sci, Hangzhou 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Sch Chem & Chem Engn, Hangzhou 312000, Zhejiang, Peoples R China;[3]Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Peoples R China

年份：2013

卷号：298

期号：1

起止页码：455

外文期刊名：JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY

收录：SCI-EXPANDED(收录号：WOS:000324546100059)、、EI(收录号：20242716643369)、Scopus(收录号：2-s2.0-84885173565)、WOS

基金：Financial supports from department of science and technology, Zhejiang province (2010C33101), the science and technology program of Shaoxing (2011A23006) and the National Natural Science Foundation of China (21207092; 20907055; 20971126) are acknowledged.

语种：英文

外文关键词：Thorium(IV); Titanate nanotubes; Adsorption; Humic acid; Fulvic acid

外文摘要：Titanate nanotubes (TNTs) have attracted great interest in multidisciplinary study since their discovery. The adsorption of thorium [Th(IV)] onto TNTs in the absence and presence of humic acid (HA)/fulvic acid (FA) was studied by batch technique. The influence of pH from 2.0 to 10.0, ionic strength from 0.001 to 0.1 mol L-1 NaClO4, and coexisting electrolyte cations (Li+, Na+, K+) and antions (ClO4 (-), NO3 (-), Cl-) on the adsorption of Th(IV) onto TNTs was tested. The adsorption isotherms of Th(IV) was determined at pH 3.0 and analyzed with Langmuir and Freundlich adsorption models, respectively. The results demonstrated that the adsorption of Th(IV) onto TNTs increases steeply with increasing pH from 2.0 to 4.0. Generally, HA/FA was showed to enhance Th(IV) adsorption onto TNTs at low pH values, but to reduce Th(IV) adsorption onto TNTs at high pH values. The adsorption of Th(IV) onto TNTs was also dependent on coexisting electrolyte ions in aqueous solution under our experimental conditions. The adsorption of Th(IV) onto TNTs is exothermic and spontaneous. The findings indicating that TNTs can be used as a promising candidate for the enrichment and solidification of Th(IV) or its analogue actinides from large volume solution in real work.