Efficient extraction of uranium from aqueous solution using an amino-functionalized magnetic titanate nanotubes

被引：78
作者：
Zhu, Jiahui [1 ]
Liu, Qi [1 ]
Li, Zhanshuang [1 ]
Liu, Jingyuan [1 ]
Zhang, Hongsen [1 ]
Li, Rumin [1 ]
Wang, Jun [1 ,2 ]
机构：
[1] Harbin Engn Univ, Minist Educ, Key Lab Superlight Mat & Surface Technol, Harbin 150001, Heilongjiang, Peoples R China
[2] Harbin Engn Univ, Inst Adv Marine Mat, Harbin 150001, Heilongjiang, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2018年 / 353卷
基金：
对外科技合作项目（国际科技项目）;
关键词：
Titanate nanotubes; Uranium (VI) adsorption; Surface complexation; Cation exchange; PHOTOCATALYTIC ACTIVITY; ADSORPTION; REMOVAL; CARBON; U(VI); CAPTURE; CD(II); CR(VI); ION; MICROSTRUCTURES;
D O I：
10.1016/j.jhazmat.2018.03.042
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
In this paper, titanate nanotubes/cobalt ferrite/tetraethylenepentamine (TNTs/CoFe2O4/TEPA) adsorbents were prepared for the adsorption of uranium (VI) from the solution. Its morphology was observed by transmission electron microscopy (TEM) and exhibited the uniform well tubular structure. TNTs/CoFe2O4/TEPA composites were easily separated from solution by an external magnetic field. The removal of uranium (VI) from aqueous solution (ppm level) and simulated seawater (ppb level) were investigated by the TNTs/CoFe2O4/TEPA composites. Batch adsorption experiments were conducted to determine the effect of varying pH, contact time, and reaction temperature. The best fit for uranium (VI) adsorption was obtained with the Langmuir model, and the highest adsorption of TNTs/CoFe2O4/TEPA composites reached 509.89 mg-U/g-adsorbent at pH 6. From an investigation of the adsorption by XRD, FTIR and XPS, it is suggested that the surface complexation and cation exchange were the main adsorption mechanism. In addition, TNTs/CoFe2O4/TEPA composites maintained good adsorption properties after five sorption-desorption cycles. Therefore, we conclude that the adsorbents are promising materials for the removal of uranium (VI) from aqueous solutions.
引用
收藏
页码：9 / 17
页数：9
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