通过固体氧化试剂对UV-328进行机械化学降解:过氧化硫酸盐与过氧化硫酸盐
Xiwang Zhao1, Xitao Liu1, Jun Huang2
1School of Environment, Beijing Normal University, Beijing 100875, China.
Journal of hazardous materials
|June 4, 2025
概括
过氧二硫酸盐 (PDS) 和过氧单硫酸盐 (PMS) 通过机械化学有效降解污染物,但PDS有利于硫酸盐基的产生,而PMS则使用直接氧化,从而产生不同的副产品和矿化效率.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 绿色化学 绿色化学
背景情况:
- 机械化学 (MC) 处理利用氧化添加剂,如过氧化硫酸盐 (PDS) 和过氧化硫酸盐 (PMS),用于持续有机污染物的降解.
- 了解MC过程中PDS和PMS的独特固体相机制对于优化环境修复策略至关重要.
研究的目的:
- 阐明PDS和PMS在2-(2H-Benzotriazol-2-yl)-4,6-bis(2-methyl-2-butanyl) phenol (UV-328) 的机械化学降解中的不同机制.
- 在MC条件下比较PDS和PMS之间的降解效率,矿化和副产品形成.
主要方法:
- 在机械化学处理中使用PDS和PMS进行UV-328降解的比较分析.
- 对酸盐表面物理化学和红外性能变化的研究.
- 利用探头实验和量子化学计算来确定反应路径.
- 矿化效率的量化和降解副产品的识别.
主要成果:
- PDS和PMS都实现了高UV-328降解 (分别为91.9%和94.1%),但对磨强度和反应剂比率的反应不同.
- PDS主要通过O-O键裂变产生硫酸盐基,而PMS更多地依赖于直接氧化,与UV-328.2形成键.
- PDS的矿化含量较高 (13.20%),产生的小分子比PMS (9.87%) 更多,但两者都导致了寡合体的形成 (PDS的;PMS的和).
结论:
- 在MC处理中,PDS和PMS通过不同的机制起作用,影响降解途径和结果.
- 对于矿化而言,PDS更有效,而PMS则表现出选择性氧化能力.
- 这两种硫酸盐系统都产生不良的寡合物,突出了进一步研究MC污染物降解的领域.
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