从莫纳酸液中提取稀土元素,使用从废物中提取的功能化奇托吸附剂
Emad A Matter1, Abdelghaffar S Dhmees2, Waheed M Salem3
1Chemistry Department, Faculty of Science, Damanhur University, Damanhur, 22511, Egypt.
Environmental science and pollution research international
|September 24, 2023
概括
这项研究开发了从废料中改造的酸盐吸收剂,以有效地回收稀土元素 (REE). 这些新材料对和其他轻型REE具有很高的容量和选择性,为REE分离提供了可持续的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 无机化学 无机化学
背景情况:
- 对高纯度稀土元素 (REEs) 的需求不断增长,需要高效的分离技术.
- 基托是一种从废物中提取的生物聚合物,是吸附剂开发的可持续前体.
- 修改基托可以提高其对目标金属离子的吸附能力.
研究的目的:
- 从的废物中生产和功能化基托.
- 为了研究改性奇托对 (La(III)) 恢复的吸附性能.
- 评估REEs开发的吸附剂的选择性和化效率.
主要方法:
- 从废物中提取和净化素.
- 交叉链接和多氨基化基托使用epichlorohydrin 和 tetraazatetradecane diamine.
- 氨基化奇托桑与酸的多碳活化.
- 吸附剂的表征和批量吸附实验用于拉III回收.
- 同热度,动力学和动力学研究,以及化和选择性测试.
主要成果:
- 成功合成了多胺基 (HA@ep@Ch) 和多碳氧化/胺基 (CM@HA@ep@Ch) 基托桑吸收剂.
- 达到了高吸附能力的拉III: 114.52 mg/g的HA@ep@Ch和141.76 mg/g的CM@HA@ep@Ch在330K.
- 使用0.5M HCl (95.8%和93.4%的回收率) 证明了吸附的有效化.
- 在液中显示出较轻的REEs (La,Ce,Pr,Nd,Sm) 与较重的REEs相比具有显著的选择性.
结论:
- 从废物中提取的改性奇托吸附剂对于和轻稀土元素的回收是有效的.
- 化和离子交换机制控制了吸附过程.
- 开发的材料为REE分离和净化提供了一个有希望的,可持续的方法.
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