Journal
CHEMICAL ENGINEERING JOURNAL
Volume 322, Issue -, Pages 353-365Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2017.03.156
Keywords
Phytic acid-decorated titanate nanotubes; U(VI); Selectivity; Spectroscopic analysis; Removal mechanism
Categories
Funding
- National Natural Science Foundation of China [41203086, 21422704, 41303006]
- Science Foundation of Jiangsu Province [BK20140007]
- Young Thousand Talented Program in China
- Jiangsu Provincial Key Laboratory of Radiation Medicine and Protection
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
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In this study, the inorganic-organic hybrid of PA/TNTs was synthesized and characterized by using multiple analysis techniques. Batch experiments were conducted to investigate the removal performance of PA/TNTs towards U(VI). The sorption kinetics procedure achieved equilibrium within 6 h. The maximum sorption capacity at 293 K and pH 5.0 was calculated to be 1.16 x 10(-3) mol/g. In addition, the PA/TNTs composite showed a higher sorption selectivity towards U(VI) over many other metal ions. The ionic strength experiments, desorption results, X-ray diffraction (XRD), solid fluorescence, extended X-ray adsorption fine structure (EXAFS) and Fourier transform infrared spectroscopy (FTIR) analysis suggested the predominant sorption mechanism was inner-sphere complexation rather than ion exchange or precipitation. Overall, the synthesized PA/TNTs composite could be utilized as a cost-effective material for the removal of U(VI) from wastewater. (C) 2017 Elsevier B.V. All rights reserved.
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