摘要
采用热氧化分解法制备了IrO2-RuO2/Ti电极,用X射线衍射(XRD)和扫描电镜(SEM)以及X射线能谱仪(EDS)对其进行表征,并考察其对脉冲电解含氰含银电镀废水中银离子的还原和氰化物分解的影响。结果表明:用热氧化分解法制备的IrO2-RuO2/Ti电极表面具有"泥裂"现象,其主要成分为IrO2,RuO2和TiO2。以IrO2-RuO2/Ti为阳极,不锈钢圆筒为阴极,在脉冲电压0.5 V,脉冲频率1 200 Hz,占空比50%,曝气量1.0 L/min,电解液循环流速100 mL/min和pH值10~11的条件下,常温电解4.0 h,发现IrO2-RuO2/Ti电极性能优于石墨电极、PbO2/Ti电极和不锈钢电极,在其作用下,废水中银离子的回收率达到99.66%,氰分解率达到91.63%。
The IrO2-RuO2/Ti electrode was preparaed by thermal oxidation decomposition method and characterized by means of X-ray diffraction spectrum(XRD),scanning electronic microscope(SEM) and X-ray energy dispersive spectrum(EDS).The effects of IrO2-RuO2/Ti on silver ion reclamation and cyanide decomposition from electroplating wastewater using the novel pulse-electrolyzed technique were investigated.The results showed that the metallic oxide layers of IrO2-RuO2/Ti electrode,prepared with thermal oxidization method,had 'putty crack' phenomenon.IrO2,RuO2 and TiO2 were the principal components of the layers.The results also showed that the performance of IrO2-RuO2/Ti electrode was better than that of graphite electrode,PbO2/Ti electrode and stainless steel electrode.The silver reclamation and cyanide decomposition reached 99.66%and 91.63%,respectively,after electrolysis 4.0 h under the conditions of IrO2-RuO2/Ti as anode,stainless steel cylinder as cathode,pulse voltage 0.5 V,pulse frequency 200 Hz,dutycycle 50%,aeration rate 1.0 L/min,circulation velocity of electrolyte 100 mL/min,pH10-11 and room temperature.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2009年第6期560-565,共6页
Chemical Reaction Engineering and Technology
基金
厦门市科技局资助项目(3502Z20071097)
关键词
氧化物
电极
脉冲电解
电镀废水
oxide
electrodes
pulse electrolysis
electroplating wastewater
