活性表面积决定了生物炭在芬顿式氧化过程中的活性
Ziqian Wang1, Chunyu Du2, Shengjiong Yang3
1Yanshan Earth Critical Zone and Surface Fluxes Research Station, College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China; College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
Journal of hazardous materials
|January 21, 2025
概括
本研究介绍了活性表面积 (ASA),以更好地测量高级氧化过程 (AOP) 中的生物炭活性. 优化的生物炭显示了增强的污染物去除,环境风险低.
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:
- 生物炭 (BC) 有活性位点 (例如含氧组,缺陷) 对于催化反应至关重要.
- 特定表面积 (SSA) 是生物炭催化活性的一个不充分的指标.
- 先进的氧化工艺 (AOP) 对于废水处理至关重要.
研究的目的:
- 建议主动表面积 (ASA) 作为AOPs中生物炭活动的优越度量.
- 开发一种方法来调节生物炭中的含氧组 (OCG) 和SSA.
- 用AOPs中的生物炭阐明污染物降解的机制.
主要方法:
- 开发了一种非破坏性蚀刻方法来修改生物炭的特性.
- 研究过氧化硫酸盐 (PDS) 和周期酸盐 (PI) 的生物炭激活.
- 采用机理学研究和理论计算来理解反应途径.
- 评估了基于生物炭的AOPs的毒性和适应性.
主要成果:
- 过氧化硫酸盐 (PDS) 激活得到增强,而周期酸盐 (PI) 激活在修饰生物碳AOPs (HFBC-AOPs) 中被抑制.
- 在HFBC-PDS系统中,四环素 (TC) 氧化主要由电子转移.
- 在HFBC-PI系统中,TC氧化是由单氧驱动的,表面基组 (-OH) 起着关键作用.
- 表面-OH的枯竭解释了HFBC-PI系统中抑制的TC氧化,尽管增加了SSA.
结论:
- 活性表面积 (ASA) 是描述AOP中的生物炭活性的一个关键参数.
- 该研究提供了关于表面功能组和电子转移在生物炭中介氧化中的不同作用的见解.
- 开发的基于生物炭的AOP在具有最小生态风险的复杂环境中表现出有效性,指导废水处理的合理生物炭设计.
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