摘要
对铅电极上在线超声电氧化Mn(Ⅱ)为Mn(Ⅲ)的反应机理进行了研究。结果表明Mn(Ⅱ)在铅电极上的超声电氧化过程与未施加超声波时氧化机理相同,Mn(Ⅱ)都不是直接与铅电极进行电子交换,而是被电极上所生成的PbO2所氧化;探讨了超声波功率和电解电流对Mn(Ⅱ)氧化的影响,实验发现二者对其影响不是呈线性关系。在其优化条件下,Mn(Ⅱ)被氧化为Mn(Ⅲ)的收率可达到98.41%。
The mechanism of on-line ultrasonic-electrooxidation of Mn(Ⅱ) to Mn(Ⅲ) on Pb electrode was studied.Results show that the electroxidic process of Mn(Ⅱ) on Pb electrode under ultrasound has the same mechanism as that without ultrasound.In both of the processes Mn(Ⅱ) is oxidized to Mn(Ⅲ) by the PbO_2 produced on the electrode.Effects of ultrasound power and electrolytic current on Mn(Ⅱ)'s oxidation were discussed.Results show that the effects are not of linear relation.When the optimal conditions for electrooxidation were 5.4 mol/L of H_2SO_4,0.315 mol/L of Mn(Ⅱ) in solution,0.7A of electrolytic current,200W of ultrasound power and 4000s of electrolytic time,the yield of Mn(Ⅲ) can reach 98.41%.
出处
《现代化工》
CAS
CSCD
北大核心
2005年第z1期167-170,共4页
Modern Chemical Industry
基金
山西省回国留学人员科研资助项目(2001-14)
山西省自然科学基金资助项目(22022027)
