利用镀Ni废水制备超细Ni粉  

Preparation of Ultrafine Nickel Powder from Nickel Plating Wastewater

作　　者：刘娟[1] 张振忠[1] 赵芳霞[1] 

机构地区：[1]南京工业大学材料科学与工程学院,江苏南京210009

出　　处：《化工环保》2010年第3期238-241,共4页Environmental Protection of Chemical Industry

基　　金：国家中小型企业创新项目(08026213700982);江苏省科技厅社会发展计划项目(BS2007120);江苏省火炬计划项目(H2007306)

摘　　要：采用正交实验法和X射线衍射仪、扫描电子显微镜等分析手段,研究了利用镀Ni废水制备超细Ni粉的工艺。实验结果表明:各因素对Ni2+回收率影响的大小顺序为反应温度>pH>聚乙烯基吡咯烷酮(PVP)加入量>n(N2H4.H2O)∶n(Ni2+);不同分散剂对Ni2+回收率和Ni粉粒度影响不同,PVP对应的产物的分散效果最好;在反应温度80℃、pH12、PVP加入量4.6g/L、n(N2H4.H2O)∶n(Ni2+)=2.0的条件下,产物Ni粉的平均粒径为0.86μm,晶胞常数为3.523nm,制备的Ni粉纯度高,废水中的Ni2+回收率为99.36%。The process for preparation of ultrafine nickel powder from nickel plating wastewater was studied by orthogonal experiments and XRD,SEM analysis methods.The experimental results show that: The order of the factors affecting Ni2+ recovery rate is as follows: reaction temperature>pH>polyvinylpyrrolidone(PVP) dosage>n(N2H4·H2O) ∶n(Ni2+);The effects of different dispersants on Ni2+ recovery rate and nickel powder size are different,and the effect of PVP on product dispersion is the best;Under the conditions of reaction temperature 80 ℃,pH 12,PVP dosage 4.6 g/L and n(N2H4·H2O) ∶n(Ni2+)=2.0,the nickel powder product has a high purity with 0.86 μm of average particle size and 3.523 nm of lattice constant,and the recovery rate of Ni2+ in the wastewater is 99.36%.

关 键 词：镀Ni废水 水合肼 液相还原 分散剂 超细Ni粉 综合利用 

分 类 号：X703[环境科学与工程—环境工程]