[Mn(salen)]_2促进Fenton反应降解苯酚废水的催化特性与机理  

Catalytic Property and Mechanism of [Mn(salen)]_2 Accelerated Degradation of Phenol Wastewater by Fenton Reaction

作　　者：张锋[1] 

机构地区：[1]宝鸡文理学院化学化工学院先进分子工程材料实验室,宝鸡721013

出　　处：《化学通报》2017年第9期873-879,共7页Chemistry

基　　金：陕西省科技厅工业攻关项目(2016GY-226;2014K08-36);陕西省植物化学重点实验室项目(14JS005;12JS008)资助

摘　　要：研究了席夫碱锰配合物{[Mn(Ⅲ)(salen)(H_2O)]_2(ClO_4)_2,简写为[Mn(salen)]_2,salen=N,N'-二(亚水杨基)-1,2-乙二胺}对Fenton反应降解苯酚的催化作用。通过紫外分析、液相色谱、双倒数作图等方法对反应特性、反应机理进行分析。实验结果表明,[Mn(salen)]_2配合物加入Fenton体系后,可提高Fenton反应降解苯酚的效率。在不同pH体系和过量H_2O_2中,均保持一定降解能力。配合物中锰离子可转变成高价态锰中间体,加速有机物氧化,提高降解效率。加入配合物后,[Mn(salen)]_2-Fenton体系催化反应活化能下降了35.9%。重复利用7次后,[Mn(salen)]_2依然保持60%的催化活性。The catalytic property for degradation of phenol wastewater using Fenton reaction of Schiff base manganese complexes{ [MnⅢ（ salen）（ H2O） ]2（ ClO4）2,[Mn（ salen） ]2} was studied. The reaction characteristics and mechanism were analyzed by UV analysis,liquid chromatography,double reciprocal mapping and other analytical methods. The experimental results showed that the degradation efficiency of phenol of Fenton reaction is improved with the addition of Mn（ salen）2complex. It maintained a certain degradation ability under different pH systems or excess H2O2. Due to the high valence manganese intermediate,which is converted from the manganese ion in the complex,the oxidation of organic matter and the degradation efficiency have been accelerated. The activation energy of the degradation reaction was reduced by 35. 9% after adding the complex into the Fenton system. The catalytic activity of [Mn（ salen） ]2 remained 60% after 7 times repeat uses.

关 键 词：锰配合物 FENTON反应 苯酚废水 降解 

分 类 号：O643.3[理学—物理化学] X703[理学—化学]