层次的阳离子交换和反向电子转移在分层的双氧化物/氧单硫酸盐系统中用于Roxarsone消除
Yu Wang1, Jie Zhou1, Wenkai Pei1
1National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, P. R. China.
Langmuir : the ACS journal of surfaces and colloids
|August 20, 2024
概括
甲交联托封装的CoCe-LDH有效地去除了罗克萨松 (ROX) 和无机. 这种先进的氧化过程还将剩余的氧化成一种不那么有毒的形式,有利于健康和环境.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 罗克萨森 (ROX) 是全球污染的重要来源.
- 有效的ROX消除方法对于人类健康和生态保护至关重要.
- 层状双氧化物 (LDHs) 在环境修复应用中表现有前途.
研究的目的:
- 开发一种高效的催化系统,用于去除罗克萨 (ROX).
- 用一种新型催化剂研究无机的吸附.
- 了解由LDH基催化剂驱动的先进氧化机制.
主要方法:
- 合成与酸盐封装的-层双氧化物 (CoCe-LDH) 的甲交联.
- 使用合成的CoCe-LDH作为氧硫酸盐 (PMS) 激活系统中的催化剂.
- 使用分析技术量化ROX和无机物种 (As(III) /As(V)) 的去除.
主要成果:
- 实现了100%的Roxarsone (ROX) 清除和超过98.5%的As (III) /As (V) 清除.
- 成功氧化了超过99.3%的剩余无机,形成了毒性较低的As (V) 形式.
- 证明LDH中的等级性离子交换促进了高度PMS微环境,通过反向电子转移促进了选择性单片氧生产.
结论:
- 甲交联托封装的CoCe-LDH是一种高度有效的催化剂,用于ROX的先进氧化和无机的吸附.
- LDHs的独特特性,包括等级性离子交换和反向电子转移,是催化剂效率的关键.
- 这项研究提出了一种新的修复方法,并促进了对基于LDH的先进氧化过程的理解.
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