选择性去除的可再生吸附剂:Co(OH)2-在离子交换树脂上衍生ZIF-67
Wei Zhu1, Ruoding Wang1, Qiong Tang1
1Jiangsu Key Laboratory of New Power Batteries, Jiangsu Collaborative Innovation Center of Biomedical Functional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, China.
Langmuir : the ACS journal of surfaces and colloids
|June 12, 2023
概括
这项研究提出了一种新的废水净化方法,使用ZIF-67固定在D-201树脂上. 由此产生的纳米复合材料有效地去除低度的酸盐,即使存在干扰离子.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 纳米技术 纳米技术
背景情况:
- 金属有机框架 (MOF) 显示出从废水中去除低度酸盐的潜力.
- 现有的MOF吸附剂在干扰离子的存在下可能会受到活性降低的影响.
- 开发稳定高效的MOF基吸附剂对于有效的水净化至关重要.
研究的目的:
- 开发一种基于MOF的新型吸附剂,以有效地从废水中去除酸盐.
- 为了提高MOF吸附剂在具有挑战性的水矩阵中的稳定性和可重复使用性.
- 研究开发材料的吸附再生机制.
主要方法:
- 使用Co(OH) 2模板将ZIF-67固定在离子交换树脂 (D-201) 上.
- 合成ZIF-67/D-201纳米复合材料的高MOF负载 (22.0重量%).
- 在干扰离子存在时评估酸盐吸附性能和评估再生效率.
主要成果:
- ZIF-67/D-201实现了98.6%的低度酸盐 (2 mg P/L) 的去除.
- 吸附剂保持了90%以上的吸附能力,干扰离子的摩尔过量是干扰离子的5倍.
- 该材料表现出极好的重复使用性,在六个再生周期后保持超过90%的去除效率.
结论:
- 纳米复合材料ZIF-67/D-201为废水处理中的酸盐去除提供了强大而有效的解决方案.
- 在D-201矩阵内,ZIF-67和Co3 ((PO4) 2) 之间的可逆结构转化促进了吸附再生循环.
- 这一战略为开发用于环境应用的先进MOF吸附剂提供了新的途径.
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