从矿山废水中回收稀土元素,使用酸盐微球封装在地质石化伊米达酸框架-8-8中
Chenxin Zhang1, Wei Chen1, Gary Owens2
1Fujian Key Laboratory of Pollution Control and Resource Reuse, School of Environmental and Resource Sciences, Fujian Normal University, Fuzhou 350117, Fujian Province, China.
Journal of hazardous materials
|May 1, 2024
概括
一种新的ZIF-8@ALG复合水凝有效地从废水中回收稀土元素 (REEs). 这种可重复使用的材料具有很高的吸附和分离能力,为从矿山废水中回收 REE 提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 对生态系统中稀土元素 (REE) 污染的担忧越来越大,需要有效的废水处理方法.
- 不同行业对 REE 的需求不断增长,凸显了对废物流的有效回收战略的需求.
研究的目的:
- 设计和评估ZIF-8@ALG复合水凝,以有效地从矿山废水中回收 REE.
- 调查用于REE去除的开发水凝的吸附性能,机制和可重复使用性.
主要方法:
- 制造一个ZIF-8@ALG复合水凝,通过在藻酸盐和聚 (乙烯基醇) 网络中封装热利性伊米达酸框架-8 (ZIF-8).
- 评估REE吸附性能,包括分离因子,吸附效率和分布系数.
- 使用酸盐研究吸附机制 (静电吸引,复杂化,离子交换) 和脱吸.
主要成果:
- 该ZIF-8@ALG复合物显示出异常的REE吸附,具有597.5.5.n的优异分离因子 (Ho/Mn).
- 观察到高吸附效率 (65.397.2%) 和分布系数 (2045.528500.0 mL·g-1),偏好重重的REEs.
- 水凝是稳定的,可以在四个周期内重复使用,并在再生后达到80.0%的最佳吸附效率.
结论:
- ZIF-8@ALG复合水凝是一种有效和可行的方法,用于从矿山废水中回收REE.
- 基于ZIF-8的材料显示出在废水工程中用于REE回收和环境修复的重大应用潜力.
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