工业水处理 ›› 2023, Vol. 43 ›› Issue (9): 91-99. doi: 10.19965/j.cnki.iwt.2022-1003

• 试验研究 • 上一篇    下一篇

耐高压席夫碱制备及对碘的吸附性能分析

郭燕鑫(), 王迎辉, 陈元涛(), 张炜, 杨娇娇   

  1. 青海师范大学化学化工学院,青海 西宁 810008
  • 收稿日期:2023-08-01 出版日期:2023-09-20 发布日期:2023-09-25
  • 作者简介:

    郭燕鑫(1996— ),硕士。电话:15631428286,E-mail:

    陈元涛,教授。电话:13897118422,E-mail:

  • 基金资助:
    国家自然科学基金项目(22266027)

Preparation of high-pressure resistant Schiff base and analysis of its iodine adsorption performance

Yanxin GUO(), Yinghui WANG, Yuantao CHEN(), Wei ZHANG, Jiaojiao YANG   

  1. College of Chemistry and Chemical Engineering,Qinghai Normal University,Xining 810008,China
  • Received:2023-08-01 Online:2023-09-20 Published:2023-09-25

摘要:

采用超高压处理技术(UHP)制得一种亚胺类席夫碱共价有机化合物。利用简单的原料4-氨基安替比林和1,4-对苯二甲醛,通过醛胺缩合制得亚胺类席夫碱共价有机化合物,后通过UHP技术对其进行改性得到耐压稳定的产物Schiff base-UHP。通过XRD、FT-IR、SEM、TGA/DSC、XPS等方法对样品的结构、形貌及反应机理进行说明。结果表明,经高压处理后的材料晶化程度增强,衍射峰强度增强,晶体结构完整;吸附过程更贴合拟一级动力学模型,Freundlich等温模型阐明多分子层吸附过程。在水溶液中对碘的理论吸附能力可达到1 535.45 mg/g;因此,经超高压处理后的材料适用于深海核废料放射性碘的处理和固定。

关键词: 超高压处理技术, 碘吸附, 席夫碱, 吸附模型

Abstract:

A covalent organic compound of imine Schiff base was prepared by high pressure treatment technology. Using simple raw materials of 4-aminoantipyrine and 1,4-terephthalaldehyde,imine schiffbase covalent organic compounds were prepared by aldimine condensation,and then modified by high-pressure treatment technology to obtain the pressure-resistant and stable product Schiff base-UHP. XRD,FT-IR,SEM,TGA/DSC and XPS were used to explain the structure,morphology and reaction mechanism of the samples. The results showed that the crystallization degree,diffraction peak intensity and crystal structure of the material after high pressure treatment were enhanced. The adsorption process fitted the pseudo-first-order kinetic model better,and Freundlich isothermal model illustrated the adsorption process of multi-molecular layer. The theoretical adsorption capacity of iodine in aqueous solution could reach 1 535.45 mg/g. Therefore,the material after high pressure treatment is suitable for the treatment and fixation of radioactive iodine in deep-sea nuclear waste.

Key words: ultra-high pressure treatment technology, iodine adsorption, Schiff base, adsorption model

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