摘要
以PbO2/Ni泡沫镍为阳极,同等尺寸的泡沫镍为阴极,电催化氧化降解含润滑油废水,探讨了电解时间、电流密度、电压、电解质质量浓度等因素对电解效率的影响。研究发现:PbO2/Ni泡沫镍电极在低电流、低电压条件下,延长电解时间,其对废水COD的去除率更高,使用寿命更长。结果表明:当电流密度0.01 A/cm^2、电压4 V、电解质质量浓度10 g/L时,电解时间200 min时,COD去除率可达到78.5%。通过扫描电镜(SEM)分析对电解前后的阳极材料表面形貌进行表征,发现电极的表面活性层有脱落的现象;通过能谱仪(EDS)分析发现电解后的阳极材料表面C元素的质量分数增加,说明在电解的过程中C以有机物或无机物的形式附着在电极表面。
The effects of electrolysis time,current density,voltage,electrolyte mass concentration and other factors on the degradation efficiency of lube oil wastewater by electrocatalytic oxidation with PbO2/Ni nickel foam as anode and nickel foam of the same size as cathode was investigated.PbO2/Ni anodes would service life longer,and its performance of removing COD in wastewater is more efficient when the electrolysis time prolongs under the condition of low current and low voltage.The most effective(78.5%)COD elimination has been obtained at 0.01 A/cm^2,4 V,10 g/L and 200 min of electrolysis time.In addition,the surface active layer of the electrode is partially detached by SEM analysis on anodes after the experiment.Simultaneously,the results of EDS analysis show that the mass fraction of element C on the surface of the anode material increases,indicating that element C is attached to the electrode surface in the form of organic matter or inorganic matter during the electrolysis process.
作者
熊丽萍
龙祺祺
何忠义
XIONG Li-ping;LONG Qi-qi;HE Zhong-yi(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,Jiangxi Province,China)
出处
《化学工程》
CAS
CSCD
北大核心
2019年第12期12-15,共4页
Chemical Engineering(China)
基金
国家自然科学基金资助项目(21563012)
