Fe-Mn/AC催化湿式过氧化氢氧化间甲酚  

Catalytic wet peroxide oxidation of m-cresol over Fe-Mn/AC catalysts

作　　者：王森[1,2] 于杨[1] 卫皇曌[1] 王亚旻 李旭宁[1] 杨旭[1] 孙承林[1] 安路阳[3] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023 [2]中国科学院大学,北京100049 [3]炼焦技术国家工程研究中心,中钢集团鞍山热能研究院有限公司,鞍山114044

出　　处：《环境化学》2015年第4期678-684,共7页Environmental Chemistry

基　　金：西部行动计划-废水处理(Y342050902)资助

摘　　要：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p H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p H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.

关 键 词：多相催化 催化湿式过氧化氢氧化 活性炭 间甲酚 

分 类 号：X784[环境科学与工程—环境工程] O643.36[理学—物理化学]