聚吡咯/石墨相氮化碳复合材料吸附铀(Ⅵ)的性能与机制

doi:10.11896/cldb.19110056

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Abstract Polypyrrole/graphite phase carbon nitride (PPy/g-C₃N₄) composites were prepared by in-situ polymerization using graphite phase carbon nitride (g-C₃N₄) and polypyrrole (PPy) as raw materials to explore the adsorption performance of PPy/g-C₃N₄ to U(Ⅵ) in wastewater. The effects of pH, temperature, PPy/g-C₃N₄ dosage, reaction time and initial concentration of U(Ⅵ) on the adsorption of U(Ⅵ) on PPy/g-C₃N₄ were studied. The results showed that at pH=5, the initial concentration of U(Ⅵ) was 5 mg/L, the dosage of PPy/g-C₃N₄ was 200 mg/L, and the adsorption time was 20 min, the maximum adsorption rate of PPy/g-C₃N₄ to U(Ⅵ) was as high as 93.22%. The adsorption isotherm of U(Ⅵ) by PPy/g-C₃N₄ accords with the Freundlich model, and the adsorption kinetics accords with quasi-secondary kinetics. SEM-EDS and XRD analysis indicated that the PPy/g-C₃N₄ material was successfully prepared. The results of XPS and FTIR indicated that PPy/g-C₃N₄ contained carbon, nitrogen functional group and oxygen-containing functional group to cooperate with U(Ⅵ), which greatly improved its adsorption perfor-mance.

Key words： graphite phase carbon nitride polypyrrole uranium adsorption

Published: 24 December 2020

CLC number:

O647.3

Fund:This work was financially supported by the National Natural Science Foundation of China(11475080), the University of South China Ph.D. Research Startup Foundation (2016XQD06), Hunan Provincial Innovation Foundation for Postgraduate (CX20190742).

About author:: Kun Yu received his bachelor’s degree from Zhejiang University of Science and Technology in 2017, and studied for his master’s degree in University of South China from 2017 to 2019.He has been presided one provincial innovation project.
Jinxiang Liu obtained her doctor degree from School of Nuclear Resources Engineering of University of South China in 2015, served as professor and master’s supervisor in University of South China till now. Her Main research directions are water treatment theory and techno-logy and pollution control research. She presided four scientific research project of the Hunan Natural Science Foundation and participate eight scientific research project of the National Natural Science Foundation.She has published sixty academic papers,including more than 10 SCI EI academic papers and won one invention patents.

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Cite this article:

YU Kun,LIU Jinxiang,XIE Shuibo, et al. Study on the Properties and Mechanism of U(Ⅵ) Adsorption of PPy/g-C₃N₄[J]. Materials Reports, 2020, 34(23): 23020-23026.

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http://www.mater-rep.com/EN/10.11896/cldb.19110056 OR http://www.mater-rep.com/EN/Y2020/V34/I23/23020

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