基于金属超氧物种MnO2+-(HCO3-)n氧化的MnⅡ-BAP体系降解苯胺
Degradation of Aniline by MnⅡ-BAP System Based on Metal Superoxide Species of MnO2+-(HCO3-)n
刘勇 1吴佳璇 1王晓艳 1任红霞2
作者信息
- 1. 天津理工大学化学化工学院,天津 300384
- 2. 南开大学化学学院,天津 300071
- 折叠
摘要
为有效处理广泛存在于地下水中的苯胺污染物,采用MnⅡ-BAP体系氧化苯胺,并对氧化效果、影响因素以及氧化过程中的主要活性物种做了系统探究.在氧化苯胺过程中,通过动力学实验以及掩蔽实验探究了MnⅡ-BAP体系氧化苯胺的最佳条件以及氧化机制.实验结果显示,MnⅡ-BAP体系可以在10 min内氧化99.5%的苯胺,反应速率常数为5.30×10-1 min-1.Mn2+与HCO3-之间存在的协同作用会导致反应体系中的HCO3-以及Mn2+的浓度对kobs有着重要的影响,金属超氧物种MnO2+-(HCO3-)n是MnⅡ-BAP体系氧化苯胺的主要活性物质.
Abstract
In order to effectively deal with aniline pollutants which are widely present in groundwater,the MnⅡ-BAP system was used to oxidize aniline,and systematically explored the oxidation process,the effect factors,and the main active species of oxidation.In the process of aniline oxidation in MnⅡ-BAP system,the optimal conditions and oxidation mechanism of aniline oxidation were investigated by kinetic experiments and quenching experiments.The experimental results showed that the MnⅡ-BAP system can oxidize 99.5%of aniline within 10 min,with a reaction rate constant of 5.30×10-1 min-1.The synergy be-tween Mn2+ and HCO3- will caused the concentration of HCO3- and Mn2+ in the reaction system to have an important impact on kobs,the superoxide species MnO2+-(HCO3-)n was the main active species for aniline oxidation in the MnⅡ-BAP system.
关键词
苯胺/MnⅡ-BAP/金属超氧物种Key words
aniline/MnⅡ-BAP system/metal superoxide species引用本文复制引用
基金项目
国家自然科学基金(51978455)
国家自然科学基金(21806121)
出版年
2024