表面功能化的聚二甲基酸海绵,用于从水性/酸性溶液中轻松选择性地回收
Yiwei Zhang1, Naokazu Idota1, Takehiko Tsukahara1
1Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, 2-12-1-N1-6, Ookayama, Meguro, Tokyo 152-8550, Japan.
Journal of hazardous materials
|February 7, 2025
概括
这项研究开发了用于选择性 (Mo(VI)) 离子回收的新型聚二甲基 (PDMS) 海绵. 这些海绵提供易于吸附和快速脱吸,显示了环境和工业应用的潜力.
科学领域:
- 材料科学 材料科学 材料科学
- 环境化学环境化学
- 分离科学 分离科学
背景情况:
- 开发有效的选择性金属离子回收方法对于环境修复和资源管理至关重要.
- 聚甲基 (PDMS) 海绵为功能化和材料开发提供了一个多功能平台.
研究的目的:
- 制造和评估用于离子 (Mo(VI)) 分离和回收的新型表面功能化PDMS海绵.
- 为了研究这些海绵在水和酸性溶液中的吸附和脱附特性.
- 探索这些海绵在环境,医疗和能源相关应用中的潜力.
主要方法:
- 用氨基功能化 (甘氨酸-PDMS) 和提取剂浸 (HDEHP-PDMS,MIDOA-PDMS) 的PDMS海绵的制造.
- 使用浸泡和挤压技术研究Mo(VI) 的吸附和脱附.
- 吸附动力学 (伪二次) 和异温体 (自发吸附) 的分析.
- 根据海绵类型确定吸附机制 (化学吸附与物理吸附).
主要成果:
- 所有PDMS海绵在水性和酸性介质中都显示出选择性Mo(VI) 吸附.
- 吸附能力因配体类型和酸度而异.
- 观察到伪二次动力学和自发吸附.
- 鉴定出了不同的吸附机制:提取剂浸的海绵的化学吸附和氨酸功能化海绵的物理吸附.
- 在几分钟内,使用诸如deferoxamine B (DFOB) 和H2O2.2.等化剂,实现了快速的Mo(VI) 脱落和回收.
结论:
- 开发的PDMS海绵为Mo(VI) 分离和回收提供了一种新且有效的方法.
- 对吸附和脱附的易于化学机械控制,与传统吸附剂相比,具有显著的优势.
- 这项技术对环境保护,医药和能源领域的各种应用具有重大前景.
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