磁黄铁矿催化分解苯酚反应动力学及其产物特征  

Study on Catalytic Decomposition Kinetics and Products of Phenol with Peroxide and Pyrrhotite

作　　者：吴大清[1] 刁桂仪[1] 袁鹏[1] 

机构地区：[1]中国科学院广州地球化学研究所,广州510640

出　　处：《矿物岩石地球化学通报》2007年第2期132-135,共4页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家自然科学基金资助项目(40373045);广东省自然科学基金资助项目(030461)

摘　　要：本文用批量实验法研究了天然磁黄铁矿在过氧化氢参与下催化分解苯酚的动力学反应。结果表明,在pH=3.81～5.88时,苯酚都可被有效的分解,分解速率k=4.0～212h-1(g/L)-1,高于氧化铁矿物类催化剂,可与Fenton试剂相比拟。同时它具有反应速率可控、催化剂与反应产物易于分离和回收等优点。对反应液中Fe(II)、Fe(Ⅲ)浓度和紫外光谱分析表明,反应过程与Fenton反应类似,苯酚先是被快速转化成多酚类化合物,接着被分解成羧酸类化合物。溶液pH不同,产物不同,总有机碳(TOC)矿化率也不同,一般可达50%～58%。The catalytic decomposition kinetics of phenol with hydrogen peroxide and sulfide mineral pyrrhotite （Fe1-x S） were investigated by using batch experimental technique under normal temperature. Results shown that as solution pH in range 3.8-5.9 phenol can be decomposed completely with the kinetic rate k=4.0-212 h^-1 （g/ L）^-1 , which is higher than that with hydrogen peroxide and iron oxide minerals, and be comparable to that with Fenton reagent. Else the solid catalysis pyrrhotite is easy to be separated from solution and reusable. The both of analytic results of violet spectra and concentrations of Fe（Ⅱ） and Fe（ Ⅲ ） in reactive solution suggest that the processes of phenol decomposition is similar to Fenton reaction, the phenol is first transferred to polyphenols and then decomposed to carboxylic acid with TOC mineralizing degree 50 %-58 % depending solution pH.

关 键 词：磁黄铁矿 苯酚 氧化分解 动力学 

分 类 号：P579[天文地球—矿物学]