Fenton氧化降解2-硝基-4-甲氧基苯胺的特性和动力学特征

为探究Fenton试剂氧化降解2-N（2-硝基-4-甲氧基苯胺）的特性，通过实验室试验系统研究了初始pH、初始c（H₂O₂）、初始c（Fe2+）、初始ρ（2-N）和反应温度等因素对2-N去除率的影响以及动力学特征.结果表明:Fenton试剂氧化降解2-N效果显著，各试验组分别在初始pH为3.0、初始c（H₂O₂）为10 mmol/L、初始c（Fe2+）为1 mmol/L、初始温度为50℃、ρ（2-N）为100 mg/L时2-N的去除率相对最高，其降解过程均符合二级动力学模型；2-N去除率随温度的升高而增大，基于在不同温度下的速率常数，推导出了2-N降解的阿伦纽斯（Arrhenius Equation）经验表达式，得到Fenton氧化2-N的活化能为30.23 kJ/mol.研究显示，经Fenton氧化后，2-N分子断链开环，生成多种小分子酸，最终降解为二氧化碳和水. 

Characteristics and Kinetics of Oxidative Degradation of 2-Nitro-4-Methoxyaniline by Fenton Oxidation Process

A series of batch experiments were carried out to investigate the effects of temperature, initial pH, initial c(H₂O₂)、initial c(Fe2+)、initial ρ(2-N) and the temperature on the oxidative degradation of 2-N (2-nitro-4-methoxyaniline) by Fenton oxidation process, along with the elucidation of its kinetic characteristics. The results showed that the oxidative degradation of 2-N by Fenton reagent was remarkable. The relatively highest 2-N removal rates in each group were observed an initial pH of 3, initial c(H₂O₂) of 10 mmol/L, initial c(Fe2+) of 1 mmol/L, initial temperature of 50℃ and initial ρ(2-N) of 100 mg/L respectively. The degradation process was found to follow a second-order kinetic model. The removal rate of 2-N increased with temperature. The Arrhenius Equation for the degradation of 2-N was derived from the rate constant values at different temperatures, and the activation energy of 2-N for the Fenton oxidation process was calculated to be 30.23 kJ/mol. Along the Fenton process, the chains and ring of 2-N were decomposed to produce a variety of small acid molecules, which were eventually degraded into carbon dioxide and water.