以间甲酚（MC）为对象，研究了Fe （Ⅵ）/H₂O₂体系对其的降解效果及机理。考察了Fe （Ⅵ）投加量、H₂O₂浓度、pH和温度等因素对间甲酚降解率的影响；利用HPLC、GC-MS等方法对其进行分析与表征，解析Fe （Ⅵ）/H₂O₂体系降解MC过程中的产物并推测可能的降解路径。结果表明，当Fe （Ⅵ）和间甲酚物质的量比为5：1、H₂O₂浓度为40 mmol/L、pH为4、温度为25℃时，反应16.5 min后间甲酚的降解率可达到100%，最终矿化度为23.85%。Fe （Ⅵ）氧化MC阶段，起氧化作用的主要为中间高价态铁；后期类Fenton氧化阶段，·OH起主要作用，反应符合准一级动力学模型，反应速率常数为0.358 32。

The degradation effect and mechanism of m-cresol by Fe(Ⅵ)/H₂O₂ system is studied,and the effects of Fe(Ⅵ) dosage,H₂O₂ dosage,pH and temperature on the degradation rate of m-cresol are investigated.HPLC,GC-MS and other methods is employed to characterize the products generated in the degradation process of m-cresol by Fe(Ⅵ)/H₂O₂ system,and speculate the possible degradation pathways.The results show that the degradation rate of m-cresol reaches 100% and the final mineralization rate is 23.85% when the molar ratio of Fe(Ⅵ) to m-cresol is 5：1,the reaction has performed for 16.5 min,the dosage of H₂O₂ is 40 mmol·L^-1,pH is 4,and the temperature is 25℃.The intermediate high valence iron plays a major role in the oxidation of m-cresol by Fe(Ⅵ),while ·OH has primary effect in subsequent Fenton-like oxidation process,which conforms to the quasi-first-order kinetic model with a reaction rate constant of 0.358 32.

冯卓(1997-),男,硕士研究生,研究方向为废水处理技术,747153151@qq.com