(1. 蘭州交通大學(xué) 寒旱地區(qū)水資源綜合利用教育部工程研究中心，蘭州 730070；
2. 中建鋼構(gòu)有限公司，四平 136000)
摘 要: 針對(duì)傳統(tǒng)單槽電解金屬錳或二氧化錳存在能耗高、資源利用率低、環(huán)境污染嚴(yán)重等問(wèn)題，提出雙膜三室電解法實(shí)現(xiàn)陰極電沉積錳同時(shí)陽(yáng)極聯(lián)產(chǎn)電解二氧化錳，中隔室電化學(xué)再生硫酸。通過(guò)分析各隔室離子濃度變化，探究雙膜三室電解法技術(shù)可行性，并對(duì)比三種離子交換膜對(duì)電沉積效果的影響。結(jié)果表明：雙膜三室電解法電沉積金屬錳同時(shí)聯(lián)產(chǎn)電解二氧化錳可以實(shí)現(xiàn)，并且陰極電流效率可達(dá)80%以上，陽(yáng)極電流效率可達(dá)60%以上，中隔室酸回收率高于65%；與Ionsep-HC、LANRAN-AM相比，TRJM-10W均相膜槽壓最低，電解12 h后，陰極電流效率為86.25%，陽(yáng)極電流效率為70.6%，中隔室酸回收率可達(dá)73.08%，但陰極液pH增幅最大，中間液Mn2+濃度最高。
關(guān)鍵字: 金屬錳；電解二氧化錳；雙膜三室；電流效率；離子傳輸
（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
