铀(Ⅵ)在氧化锌修饰聚丙烯腈纤维上的吸附行为

doi:10.11896/cldb.18040272

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Abstract In this study, the ZnO/PANF adsorbent was successfully synthesized by solvothermal self-assembly. The zinc oxide (ZnO) nanorod arrays were grown in situ on polyacrylonitrile fiber (PANF) surface. Due to the introduction of ZnO, the adsorbent effectively increases the active sites on the PANF surface, thereby improving the adsorption capacity of pure PANF. The scanning electron microscopy was used to characterize the material morphology. A series of batch adsorption experiments were carried out to study the effects of pH value and initial concentration of uranium solution, contact time and temperature on the adsorption of U (Ⅵ). The results showed that the optimal adsorption amount of U(Ⅵ) of ZnO/PANF adsorbent was 248.14 mg· g^-1 at 298.15 K, pH=6, C₀=200 mg· L^-1, and t=180 min, which is consistent with the pseudo-se-cond-order kinetics model and the Langmuir isotherm model. The adsorption is an endothermic and spontaneous process. The adsorbent exhibits excellent ion selectivity and cycle reproducibility. It is worth noting that the removal efficiency of ZnO/PANF composites for low-concentration uranium is 89% and for real seawater and simulated seawater contaminated by radioactive waste can also reach more than 45%, demonstrating the potential of the adsorbent in the field of uranium extraction from seawater. Furthermore, the adsorption mechanisms of U(Ⅵ) by ZnO/PANF was detailed conducted by IR and XPS analysis, and could be ascribed to the oxygen-containing groups of -COOH and Zn-O.

Key words： low concentration uranium zinc oxide polyacrylonitrile fiber adsorption

Published: 19 June 2019

CLC number:

TQ424

Fund:This work was supported by National Natural Science Foundation of China (NSFC 51603053), the Application Technology Research and Development Plan of Heilongjiang Province (GX16A009), Harbin Application Technology Research and Development Fund (2015RAQXJ038).

About author:: Guoqing Huang received his Ph.D. in microelectro-nics and solid state electronics from Jilin University in 2014 and has worked in the 718^th Research Institute of CSIC since then. Guoqing Huang’s research focuses mainly on the preparation of advanced functional materials and its application to extract uranium from sea water. Huang has published 2 scientific papers in foreign periodicals and filed 5 patents, including 3 authorization patents.Jun Wang received his bachelor degree from the Department of Chemistry of Jilin University in 1996 and Ph.D. degree from the Harbin Engineering University majoring in materials science in 2007. Presently, he is a professor and doctoral supervisor of College of Material Science and Chemical Engineering in Harbin Enginee-ring University. Now, more than 200 SCI research papers were published in journals as first or corresponding author. Six of them were assessed as ESI highly cited paper and one of them was hot paper. He also published 26 patents. His team current research is focused on enrichment, separation and purification of low concentration uranium in ocean; development and engineering application of long-term marine antifouling coating; preparation of biomimetic functional material.

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	HUANG Guoqing
	BAI Zhenyuan
	CHEN Zhaowen
	LIU Qi
	WANG Jun

Cite this article:

HUANG Guoqing,BAI Zhenyuan,CHEN Zhaowen, et al. Adsorption Behavior of Uranium(Ⅵ) on Zinc Oxide-modified Polyacrylonitrile Fibers[J]. Materials Reports, 2019, 33(14): 2436-2443.

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http://www.mater-rep.com/EN/10.11896/cldb.18040272 OR http://www.mater-rep.com/EN/Y2019/V33/I14/2436

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