基于金属超氧物种MnO_(2)^(+)-(HCO_(3)^(-))_(n)氧化的Mn^(Ⅱ)-BAP体系降解苯胺

Degradation of Aniline by Mn^(Ⅱ)-BAP System Based on Metal Superoxide Species of MnO_(2)^(+)-(HCO_(3)^(-))_(n)

为有效处理广泛存在于地下水中的苯胺污染物,采用Mn^(Ⅱ)-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Mn^(Ⅱ)-BAP体系氧化苯胺的最佳条件以及氧化机制.实验结果显示,Mn^(Ⅱ)-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).Mn^(2+)与HCO_(3)^(-)之间存在的协同作用会导致反应体系中的HCO_(3)^(-)以及Mn^(2+)的浓度对k_(obs)有着重要的影响,金属超氧物种Mn O_(2)^(+)-(HCO_(3)^(-))_(n)是Mn^(Ⅱ)-BAP体系氧化苯胺的主要活性物质.

In order to effectively deal with aniline pollutants which are widely present in groundwater,the Mn^(Ⅱ)-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 Mn^(Ⅱ)-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 Mn^(Ⅱ)-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 between Mn^(2+)and HCO_(3)^(-) will caused the concentration of HCO_(3)^(-) and Mn^(2+) in the reaction system to have an important impact on k_(obs),the superoxide species Mn O_(2)^(+)-(HCO_(3)^(-))_(n) was the main active species for aniline oxidation in the MnⅡ-BAP system.