通过表面活性剂修改的152+154Eu (III) 的有效吸附 mg/al层叠的双氧化物
Ahmed H A Harb1, Ahmed M Elewa1, Reda R Sheha1
1Nuclear Chemistry Department, Hot Laboratories Center, Egyptian Atomic Energy Authority, Cairo, 13759, Egypt.
概括
修改的-层双氧化物 (Mg/Al-LDHs) 有效地从废水中去除放射性Eu-EDTA复合物. 这种增强的吸附剂显示了环境修复应用的高效率和能力.
科学领域:
- 环境科学与工程环境科学与工程
- 材料科学 材料科学 材料科学
- 放射化学 放射化学是指辐射化学.
背景情况:
- 放射性液体废物整治,特别是复合联体,是一个重要的环境问题.
- 阴离子放射性核化物复合物对传统的处理方法构成了特别的挑战.
研究的目的:
- 开发一种增强的吸附剂,用于从水溶液中去除阳离子放射性核化物复合物.
- 为了研究Eu-EDTA修饰的-层双氧化物 (Mg/Al-LDHs) 的吸附性能.
主要方法:
- 用 cetyltrimethylammonium bromide (CTAB) 修改的 Mg/Al-LDHs 的一个合成.
- 使用FT-IR,XRD,SEM和TGA/DTA进行表征.
- 批量吸附实验以确定去除效率,动力学和异热态的行为.
主要成果:
- 经过CTAB修改的Mg/Al-LDH在60分钟内实现了90%的Eu-EDTA去除.
- 修改后的吸附能力增加了50%,达到36.6毫克-1的152+154欧盟.
- 吸附遵循伪二次动力学和兰木尔异热模型;过程是内热和自发的.
结论:
- 化的修饰显著提高了Mg/Al-LDHs对阳离子放射性核化物复合物的吸附性能.
- 经CTAB修改的LDH为放射性液体废物的整治提供了一个有希望的,高效的材料.
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