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%.
出处
《化工环保》
CAS
CSCD
北大核心
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)
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
nickel plating wastewater
hydrazine hydrate
liquid phase reduction
dispersant
ultrafine nickel powder
comprehensive utilization
