现代化工

现代化工 ›› 2021, Vol. 41 ›› Issue (1) : 118-122,127. DOI: 10.16606/j.cnki.issn0253-4320.2021.01.024

科研与开发

磷酸化MOF衍生碳基材料(PC-808-PO₄)对U(Ⅵ)吸附性能的研究

魏媛媛, 王有群, 裴佳莹, 南华瑞, 曹小红, 刘云海

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Study on adsorption properties of phosphorylated MOF-derived carbon materials (PC-808-PO₄) to U(Ⅵ)

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Received		Published
2020-09-15		2021-01-20
Issue Date	Revised Date
2021-01-14	2020-09-15

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摘要

以MOF-808为牺牲模板，经惰性气氛碳化和磷酸化改性制备磷酸化MOF衍生碳基材料PC-808-PO₄，并考察其对U（Ⅵ）的吸附性能。结果表明，在pH 5.5和298.15 K时，PC-808-PO₄对U（Ⅵ）的最大吸附容量为391.54 mg/g。U（Ⅵ）在PC-808-PO₄上的吸附符合Langmuir吸附等温模型和准二级动力学模型，表明其为单层化学吸附过程。PC-808-PO₄对U（Ⅵ）的优异吸附效果可用于放射性废水中U（Ⅵ）的去除。

Abstract

Using MOF-808 as sacrificial templates,phosphorylated MOF-derived carbon materials (PC-808-PO₄) are prepared by carbonization in inert atmosphere followed by phosphorylation.PC-808-PO₄ are used as adsorbents for the removal of U(Ⅵ) through batch experiments.Results show that the maximum adsorption capacity of PC-808-PO₄ to U(Ⅵ) reaches 391.54 mg·g^-1 at a pH value of 5.5 and 298.15 K.The adsorption process of U(Ⅵ) by PC-808-PO₄ conforms to Langmuir adsorption isotherm and pseudo-second-order kinetic model,indicating a monolayer chemical adsorption process.PC-808-PO₄ can be used as adsorbent to remove U(Ⅵ) from radioactive wastewater due to their excellent adsorption performance.