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LIU Xiyan1; YU Ming1; LIU Hanzhou1; 3; MA Hongjuan1; CHI Hongying1; 2; 3; YANG Xiaojuan1; WANG Min1; LI Jingye1; 2

doi:10.11889/j.1000-3436.2014.rrj.32.010301

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更新时间：2021-12-01

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- Journal of Radiation Research and Radiation Processing Vol. 32, Issue 1, Pages: 10301-010301(2014)
- 作者机构：
  
  1. 1（中国科学院上海应用物理研究所）,上海,201800
  2. 2（中国科学院核辐射与核能技术重点实验室）,上海,201800
  3. 3（中国科学院大学）,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.11889/j.1000-3436.2014.rrj.32.010301
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LIU Xiyan1, YU Ming1, LIU Hanzhou1, et al. [J]. Journal of Radiation Research and Radiation Processing 32(1):10301-010301(2014)
DOI：

LIU Xiyan1, YU Ming1, LIU Hanzhou1, et al. [J]. Journal of Radiation Research and Radiation Processing 32(1):10301-010301(2014) DOI： 10.11889/j.1000-3436.2014.rrj.32.010301.

摘要

通过批量吸附实验研究了辐射接枝技术制备的偕胺肟基聚偏氟乙烯(PVDF-g-PAO)粉体对低浓度铀酰离子的吸附行为，考察铀酰离子初始浓度、温度、pH值对吸附行为的影响。结果表明，PVDF-g-PAO粉体对低浓度铀酰离子的吸附较快，约180 min达动态平衡，吸附过程符合准二级动力学模型和Freundlich等温吸附模型，吸附反应是熵增加的吸热反应。体系pH值对铀酰离子吸附率影响表明，pH值在5?8范围内时，吸附率变化不大，偕胺肟基材料比较适合海水环境下的吸附，同时发现对材料上已吸附铀酰离子可用酸或碱溶液脱附。

Abstract

The adsorption behavior of uranyl ions in low initial concentration on the amidoxime group functionalized polyvinylidene fluoride powder polymeric material (PVDF-g-PAO) was investigated by batch sorption experiments in this paper, while influences of initial uranyl ions concentration, temperature and the pH value were also concerned. The adsorption equilibrium time can be reached after about 180 min. Adsorption kinetic pattern is in good agreement with the pseudo-second-order model, and the Freundlich isotherm model fits the adsorption equilibrium data well. The uranyl ions adsorption on PVDF-g-PAO is pH dependent, where the adsorption rate keeps constant with the pH value ranging from 5 to 8 (being acclimatized to seawater pH value), but decreases obviously in the acid and alkali system. It is obvious that acid and alkali solutions are effective eluting agents for uranyl ions adsorbed on PVDF-g-PAO powder.Cited

关键词

铀酰离子吸附偕胺肟基聚偏氟乙烯

Keywords

Uranyl ionsAdsorptionAmidoxime groupPolyvinylidene fluoride (PVDF)

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DOI：10.11889/j.1000-3436.2014.rrj.32.010301

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