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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 effects of Schiff base Mn (Ⅲ) (salen) (H_2O)] _2 (ClO_4) _2, abbreviated as Mn (salen) _ 2 and salen = N, ) -1,2-Ethylenediamine} for Catalytic Degradation of Phenol by Fenton Reaction. The reaction characteristics and reaction mechanism were analyzed by UV analysis, liquid chromatography and double reciprocal mapping. The experimental results show that the addition of Mn (salen) 2 complex to Fenton system can increase the efficiency of Fenton reaction in phenol degradation. In different pH system and excess H_2O_2, all maintain some degradation. Manganese ion complexes can be transformed into high-priced manganese intermediates to accelerate the oxidation of organic matter to improve the degradation efficiency. After adding the complex, the activation energy of [Mn (salen)] 2-Fenton system decreased by 35.9%. Reuse of 7 times, [Mn (salen)] _ 2 remains 60% of the catalytic activity.