使用LDHs进行电化学氧化和化去除的电化学氧化和化策略
Xiaomeng Guo1, Tengxiao Ren1, Jian Zhang1
1State Key Laboratory of Chemical Engineering, Tianjin Key Laboratory of Membrane Science & Desalination Technology, and School of Chemical Engineering and Technology, Tianjin University, Tianjin, 300350, China.
Small (Weinheim an der Bergstrasse, Germany)
|December 16, 2024
概括
放射性污染是通过使用铁层双氧化物 (NiFe-LDH) 来转化和固定它来解决的. 这种电化学方法有效地从水生环境中去除化物.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 放射性化物对生态系统和人类健康构成重大风险,需要有效的水污染减缓战略.
- 层状双氧化物 (LDH) 是对阴离子污染物具有成本效益的二维吸附剂,但对的亲和力有限.
- 有效的去除和固定对于处理放射性液体废物至关重要.
研究的目的:
- 开发一种电化学策略,使用层叠的双氧化物去除和固定化物.
- 研究化物转化为对LDHs有较高亲和力的物种.
- 评估开发的方法对实际应用的性能和适应性.
主要方法:
- 电化学氧化在NiFe-LDH/CC电极上的不同电位 (0.6V和1.0V与Ag/AgCl相比).
- 化物转化产物 (I2/I3-和IO3-) 的表征.
- 吸附机制的分析,包括表面吸附和层间插入LDHs.
主要成果:
- 被电化学氧化成I2/I3和IO3,达到高吸附能力 (分别为962 mg g-1和355 mg g-1).
- I2/I3-在NiFe-LDH表面上被弱吸收,而IO3-则以强烈的亲和力插入到LDH中间层中.
- 该方法表现出高度适应低化度,广泛的pH值范围和出色的离子选择性.
结论:
- 使用NiFe-LDH的电化学氧化和化策略有效地去除和固定化物.
- 酸盐对LDH中间层的高亲和力归因于与Ni原子的气结合和协调.
- 这种方法为从放射性液体废物中有效消除的基础.
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