کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6465642 | 1422956 | 2017 | 13 صفحه PDF | دانلود رایگان |
- Phytic acid modified titanate nanotubes (PA/TNTs) composite was synthesized by one-pot method.
- The sorption kinetics of U(VI) on PA/TNTs achieved equilibrium within 6Â h.
- The maximum sorption capacity at 293Â K and pH 5.0 was 1.16Â ÃÂ 10â3Â mol/g.
- PA/TNTs showed a higher sorption selectivity towards U(VI) than other coexisting metal ions.
- Macroscopic and spectral analysis suggested a removal mechanism of inner-sphere complexation.
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 6Â h. The maximum sorption capacity at 293Â K and pH 5.0 was calculated to be 1.16Â ÃÂ 10â3Â 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.
Journal: Chemical Engineering Journal - Volume 322, 15 August 2017, Pages 353-365