同槽双极锰的电沉积实验研究  

Experimental Study on Electrodeposition of Synchronous Bipolar Manganese

作　　者：李欣怡 王三反 余宏亮 徐祺 LI Xinyi;WANG Sanfan;YU Hongliang;XU Qi(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Engineering Research Center for Cold and A rid Regions Water Resource Comprehensive Utilization,Division of Education,Lanzhou 730070,China;Bureau of Land Resources and Planning,Jiangxia District,Wuhan 430200,China)

机构地区：[1]兰州交通大学环境与市政工程学院寒旱地区水资源综合利用教育部工程中心,甘肃兰州730070 [2]武汉市江夏区国土资源和规划局,湖北武汉430200

出　　处：《水处理技术》2019年第2期23-26,共4页Technology of Water Treatment

基　　金：国家自然科学基金项目(21466019);兰州交通大学优秀平台基金(201606);兰州交通大学校青年基金(2015016)

摘　　要：以MnSO_4为电解液体系,采用双膜三室电解装置在阴极沉积金属锰,阳极得到微粒二氧化锰。研究了Mn^(2+)含量、电流密度、电极材料等因素对双极电解效果的影响。结果表明,在阴极Mn^(2+)、(NH_4)_2SO_4、SeO_2的质量浓度分别为35、100、0.03 g/L,pH为6.8、电流密度300 A/m^2、温度35℃,阳极Mn^(2+)的质量浓度35 g/L、H_2SO_4浓度2.5 mol/L、电流密度900 A/m^2的优化条件下,阴极电流效率为67.8%、酸回收率为40.8%、能耗为7.626 Wh/g,阳极电流效率为86.4%,能耗为3.996 Wh/g。对比了Ti电极、Ti/Ru电极和Ti/PbO_2电极3种不同的电极材质对阳极产物MnO_2的影响,Ti/PbO_2电极具有析氧电位高、氧化能力强、耐强酸腐蚀和价格低廉等优点,电流效率最高,达87.6%。Using MnSO4 as the electrolyte system, a two-membrane three-compartment electrolyzer was used to deposit metallic manganese at the cathode and a particulate manganese dioxide at the anode. The effects of Mn^2+ content, current density, and electrode materials on the effect of bipolar electrolysis were studied. The results showed that, the mass concentration of Mn^2+,(NH4)2SO4and SeO2 was 35, 100 and 0.03 g/L respectively, pH was 6.8 current density was 300 A/m^2, temperature was 35 ℃ at cathode;the mass concentration of Mn2+was 35 g/L, with a concentration of H2SO4 was 2.5 mol/L and a current density was 900 A/m^2 at anode, the cathode current efficiency was 67.8%, the acid recovery rate was 40.8 %, the energy consumption was 7.626Wh/g, the anode current efficiency was 86.4%, and the energy consumption was 3.996 Wh/g. The effects of three different electrode materials of Ti electrode, Ti/Ru electrode and Ti/PbO2 electrode on the anodic product MnO2 were compared. The Ti/PbO2 electrode was characterized by high oxygen evolution potential, strong oxidizing ability, strong acid resistance and low cost, and the current efficiency was highest which reached 87.6%.

关 键 词：硫酸锰体系 电流效率 酸回收率 析氧电位 

分 类 号：X758[环境科学与工程—环境工程]