采用等体积浸渍法制备了一种新型Fe?Mn／AC催化剂，应用于催化湿式过氧化氢氧化（ CWPO）间甲酚废水．通过SEM和XRF表征了其表面形态结构和元素组成，通过穆斯堡尔谱分析了催化剂中铁离子的存在形态，结果表明，新型Fe?Mn／AC催化剂中的铁以二价铁、三价铁以及四氧化三铁的形式存在．通过正交实验考察了CWPO降解间甲酚的影响因素，结果表明，各因素对间甲酚转化率影响的大小顺序依次为：底物初始pH值＞反应温度＞反应时间＞催化剂投加量．通过正交实验得到CWPO降解间甲酚的最佳反应条件．当间甲酚浓度为100 mg·L－1、反应温度为40℃、反应时间为40 min、催化剂投加量为0．6 g·L－1及底物初始pH值为3时，间甲酚转化率为99．8％，TOC去除率为28．3％．气相色谱／质谱联用没有检测到中间产物，气相色谱检测到CWPO降解间甲酚中间产物主要为乙酸和丙酸．
A new type of Fe?Mn/AC catalyst was prepared by incipient impregnation method, and was applied in the catalytic wet peroxide oxidation ( CWPO) of m?cresol. The surface structure and element composition were analyzed via scanning electron microscopy ( SEM) and X?ray fluorescence ( XRF) , respectively. M?ssbauer spectra was employed to detect the valence changes of iron, which indicated iron species of Fe?Mn/AC catalyst were ferrous, ferric and ferroferric oxide. Then, a series of orthogonal experiments were performed to investigate the influence factors of the degradation of m?cresol by CWPO. The results showed that the influence order of the factors on m?cresol conversion was as follows: initial pH > reaction temperature > reaction time > the dosage of catalyst. The optimal experimental conditionsfor the degradation of m?cresol in CWPO was obtained by orthogonal experiments . When the concentration of m?cresol was 100 mg·L-1 , the highest degradation efficiency (99.8%) and highest mineralization efficiency (28.3%) were obtained at T = 40℃, t = 40 min, Ccat= 0.6 g·L-1, pH = 3. The degradation intermediate of m?cresol in CWPO were determined by GC?MS, which indicated that the main degradation products were acetic acid and propionic acid.
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