(1. 兰州交通大学 寒旱地区水资源综合利用教育部工程研究中心，兰州 730070；
2. 中建钢构有限公司，四平 136000)
摘 要: 针对传统单槽电解金属锰或二氧化锰存在能耗高、资源利用率低、环境污染严重等问题，提出双膜三室电解法实现阴极电沉积锰同时阳极联产电解二氧化锰，中隔室电化学再生硫酸。通过分析各隔室离子浓度变化，探究双膜三室电解法技术可行性，并对比三种离子交换膜对电沉积效果的影响。结果表明：双膜三室电解法电沉积金属锰同时联产电解二氧化锰可以实现，并且阴极电流效率可达80%以上，阳极电流效率可达60%以上，中隔室酸回收率高于65%；与Ionsep-HC、LANRAN-AM相比，TRJM-10W均相膜槽压最低，电解12 h后，阴极电流效率为86.25%，阳极电流效率为70.6%，中隔室酸回收率可达73.08%，但阴极液pH增幅最大，中间液Mn2+浓度最高。
关键字: 金属锰；电解二氧化锰；双膜三室；电流效率；离子传输
（1. Engineering Research Center of Water Resources Utilization in Cold and Drought Region, Ministry of Education, School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China;
2. China Construction Steel Structure Co., Ltd., Siping 136000, China）
Abstract:In view of the problems of high energy consumption, low resource utilization and serious environmental pollution in the traditional single-slot electrolytic manganese or manganese dioxide, this work proposed a double-membrane three-chamber electrolysis method to achieve cathode electrodeposition of manganese while the anode was co-produced with electrolytic manganese dioxide, and the intermediate compartment electrochemically regenerated sulfuric acid. By analyzing the changes of ion concentration in each compartment, the feasibility of double-membrane three-chamber electrolysis was explored, and the effects of three ion exchange membranes on electrodeposition were compared. The results show that the double-membrane three-chamber electrolysis method can realize the electrodeposition of manganese metal and the simultaneous production of electrolytic manganese dioxide, and the cathode current efficiency can reach more than 80%, the anode current efficiency can reach more than 60%, and the acid recovery rate in the middle compartment is higher than 65%. Compared with Ionsep-HC and LANRAN-AM, the TRJM-10W homogeneous membrane has the lowest cell voltage. After 12 hours of electrolysis, the cathode current efficiency is 86.25%, the anode current efficiency is 70.6%, and the intermediate compartment acid recovery rate is 73.08%. However, the pH value of the catholyte increases the most, and the concentration of Mn2+ in the middle compartment is the highest.
Key words: electrolytic manganese dioxide; double-membrane three-chamber; current efficiency; ion transport
