在具有含基组的功能化半孔二氧化材料上,Re (VII) 和Mo (VI) 的吸附行为
Baoxun Zhao1, Yaming Wang2, Xin Luo1
1School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China; Zhongyuan Critical Metals Laboratory, Zhengzhou University, Zhengzhou, 450001, China; The Key Lab of Critical Metals Minerals Supernormal Enrichment and Extraction, Ministry of Education, Zhengzhou, 450001, China.
Environmental research
|May 2, 2025
概括
伊米达移植的MCM-41显示出在从溶液中去除有毒 (VI) 的选择性优越. 这种吸附剂设计为回收有价值的资源提供了一种可持续的方法.
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:
- 从含有 (Re) 的溶液中深度去除 (Mo) 对于减轻Mo的毒性和实现可持续的Re回收至关重要.
- 选择性吸附剂是关键的,功能组决定了Mo (VI) /Re (VII) 分离效率.
研究的目的:
- 系统地比较MCM-41的Mo/Re吸附和分离性能,与初级氨基,四级氨基和伊米达基团接种.
- 建立一个机制框架,用于设计选择性吸附剂,用于从富含Re的工业废水中深度去除Mo (VI).
主要方法:
- 合成的MCM-41接种了初级氨基,四级氨基和伊米达基.
- 使用XRD和热重力测量分析 (TGA) 描述了吸附剂.
- 在单个和二进制系统中评估了Mo(VI) /Re(VII) 吸附和分离性能.
- 应用了兰格穆尔等温和和伪二次运动模型.
- 使用密度函数理论 (DFT) 的计算.
主要成果:
- 伊米达移植的MCM-41保留了最高的特定表面积 (710.98 m2/g) 和中孔结构.
- 用伊米达改性吸附剂表现出优异的Mo(VI) 选择性 (分离因子为1171.57).
- 最大的Mo(VI) 吸附能力为169.60 mg/g (初级氨基),183.20 mg/g (四级氨基) 和191.33 mg/g (伊米达).
- 吸附遵循一种由化学吸附主导的单层机制.
结论:
- 以伊米达接种的吸附剂在选择性Mo(VI) 清除方面表现出了卓越的性能,这是由于结构适应和化学驱动力的结合.
- 该研究提供了一种可行的解决方案,用于从工业废水中深度去除,从而促进战略资源回收利用.
- 建立了一个用于设计选择性吸附剂的机制框架.
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