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Fenton体系是H2O2与Fe(II)反应产生.OH的过程。本文主要研究了二甲基亚砜对Fenton体系产生的.OH的捕获,通过分析产物HCHO的浓度,确定.OH的生成量。同时,建立了DMSO捕获Fenton体系产.OH过程的化学反应模型,考察了DMSO初始浓度、pH值对Fenton体系的影响。结果表明DMSO浓度达到246 mmol/L时能够基本完全捕获Fenton体系所产生的.OH;pH值小于5时,Fenton体系受到H+激发释放较多的.OH,pH值不大于5时,H+对Fenton体系的激发能力不足。
Fenton system is the reaction of H2O2 with Fe (II) .OH process. In this paper, we mainly studied the capture of .OH from dimethylsulfoxide on Fenton system. The concentration of HCHO was determined to determine the formation of .OH. At the same time, the chemical reaction model of DMSO production by Fenton system was established, and the effect of initial concentration of DMSO and pH value on the Fenton system was investigated. The results showed that when the concentration of DMSO reached 246 mmol / L, the total amount of .OH generated by the Fenton system could be completely captured; when the pH value was less than 5, the Fenton system was more excited by H + Insufficient capacity of the system.