摘要
采用电沉积的方法处理强酸含Cu^(2+)废水,并回收阴极铜。研究了电流、时间、初始Cu^(2+)含量、杂质离子对Cu^(2+)去除率和铜回收量的影响。结果表明,在0.9 A、4 h条件下,Cu^(2+)的质量浓度从24.26 g/L降低到0.63 g/L,Cu^(2+)的去除率可达97.40%,Cu回收率为92.89%;电流从0.6 A增至1.2 A、时间从6 h降到2 h,Cu^(2+)的去除率分别为80.63%,82.71%;电镜测试结果看出,沉积纳米铜颗粒均匀,约为50~300 nm,能谱分析其纯度可达99.61%;增大沉积电流,形貌从层状堆积型转变为球状颗粒型,表明沉积电流为生长机制转变的关键因素。
High acid wastewater containing Cu^2＋was treated by electro-deposition method and copper was recovered at cathode simultaneously.The effect of deposition current,time,initial Cu^2＋content and impurity ions on Cu^2＋removal rate and copper recovery were investigated.Results indicated that,when deposition current and time was 0.9 A and 4 h respectively,the Cu^2＋mass concentration decreased from 24.26 g/L to 0.63 g/L,the removal rate was97.40%and the copper recovery rate was 92.89%.When deposition current increased from 0.6 A to 1.2 A,Cu^2＋removal rate was 80.63%,and when the time decreased from 6 h to 2 h,Cu^2＋removal rate was 82.71%.It was revealed that the particles of deposition nano-copper were uniform with a dimension of 50~300 nm by SEM,and the purity could achieve 99.61%via EDX analysis.Morphology feature would shifted from the type of layered accumulation to spherical particle when the deposition current increased,which showed the deposition current was the key factor for growth mechanism changing.
出处
《水处理技术》
CAS
CSCD
北大核心
2018年第3期34-38,共5页
Technology of Water Treatment
基金
国家重点研发计划(2016YFB0600503
2016YFC0400503
2016YFC0400506)
关键词
电沉积
含铜废水
纳米铜回收
废水处理
electro-deposition
wastewater containing copper
nano-copper recovery
wastewater treatment
