金属离子在过硫酸盐降解甲基橙染料废水中活化作用的比较分析

Comparative Analysis of the Activation of Metal Ions in Degradation of Methyl Orange Wastewater by Persulfate

过硫酸盐利用热、过渡金属离子、超声与热的联合作用等方法活化产生的强氧化性硫酸根自由基4SO？？,在环境污染治理领域具有广阔的应用前景。本研究比较分析过渡金属离子Mn2＋、Fe2＋、Cu2＋、Co2＋、Ag＋对过硫酸钠在降解甲基橙废水过程中的活化作用。实验结果显示在甲基橙的浓度过40mg/L,p H值在5-6之间,过硫酸盐的浓度为0.1 mol/L,金属离子的浓度相同时（均为5 mmol/L）,对过硫酸盐的活化效果最好,最大去除率可达到91.60%。

The persulfate can produce strong oxidizing sulfate radical by heating, transition metal ions or ultrasonic. So the persulfatehas a broad application prospect in controlling environmental pollution. In this paper, comparative analysis of the activation of metalions （Mn24,Fe2＋,Cu2＋,Co2＋and Ag ）was carried out. The experimental results show that, all these metal ions have good activation; thelargest removal rate can reach 91.60% when concentration of methyl orange is 40mg/L, pH is 5-6, concentration of persulfate is 0.1 g/L,concentration of metal ions is 5 mmol/L.