The Adsorptive Ability of 3D Flower-Like Titanium Phosphate for U(VI) in Aqueous Solution
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The Adsorptive Ability of 3D Flower-Like Titanium Phosphate for U(VI) in Aqueous Solution Youqun Wang & Dejun Zeng & Ying Dai & Chenglei Fang & Xuewen Han & Zhibin Zhang & Xiaohong Cao & Yunhai Liu
Received: 14 March 2020 / Accepted: 12 August 2020 # Springer Nature Switzerland AG 2020
Abstract In the present work, 3D flower-like nanostructure titanium phosphates (F-TiP/T; T is the temperature of preparation in Celsius) were prepared through the reaction of tetrabutyl titanate (TBOT) with concentrated phosphoric acid. And F-TiP/T were applied to remove of U(VI). Furthermore, the effects of the preparation temperature, initial solution pH, and the kinetics and thermodynamics of U(VI) adsorbed by F-TiP/T were comprehensively explored. The characterization results of SEM and XRD indicated that the morphology of F-TiP/T was flower-like with a phase of Ti(HPO4)2•2H2O. Moreover, the adsorption results indicated that the processes were fitting to pseudo-firstorder and Sips models and the saturated adsorption capacity was recorded as 295.13 mg·g−1. The extraction Y. Wang : D. Zeng : Y. Dai : C. Fang : X. Han : Z. Zhang : X. Cao : Y. Liu State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013 Jiangxi, China Y. Wang : D. Zeng : Y. Dai : C. Fang : X. Han : Z. Zhang (*) : X. Cao : Y. Liu Engineering Research Center of Nuclear Technology Application, East China University of Technology, Nanchang 330013 Jiangxi, China e-mail: [email protected] Y. Liu (*) Fundamental Science on Radioactive Geology and Exploration Technology Laboratory, East China University of Technology, Nanchang 330013 Jiangxi, China e-mail: [email protected]
of U(VI) on F-TiP/T was dominated by ion exchange. The results above indicate that F-TiP/T is a potentially efficient U(VI) adsorbent, which could be utilized in the removal and immobilization of U(VI) in wastewater. Keywords Flower-like nanostructure . Titanium phosphate . Uranium . Adsorption
1 Introduction In the nuclear fuel cycle, a substantial quantity of radioactive waste containing uranium has generated. Hence, the safe disposal of radioactive waste is critically important (Lu et al., 2018); this also affects the sustainable development of the nuclear industry. Due to the heavy metal and radioactivity, dual toxicity of uranium (Li et al., 2017; Wang et al., 2018b) and uraniumcontaining wastewater pose serious health risks for human beings and damage the environment (Shin et al., 2016). Because of high efficiency, and simple to treat uranium-containing wastewater (Zhang et al., 2016), the adsorption technique has attracted increasing attention. The most crucial aspect in adsorption is the design and preparation of an efficient adsorbent that shows high affinity to U(VI). The nano-adsorbent with the merit of large specific surface area and high activity (Mahfouz et al., 2015) has been widely employed in exploring of the separation and recovery of U(VI). A 3D flower-like structure nano-adsorbent is a new kind of material. It has a high sp
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