摘要
采用电沉积法制备了稀土和氟树脂等共掺杂的新型二氧化铅电极,并用于声电氧化体系中作为阳极处理典型模拟染料废水.考察了声电耦合氧化条件下的协同因子变化,发现PbO2/Ti电极和La-PbO2/Ti电极作阳极时,协同因子分别为1.29、1.36.考察并优化了该氧化镧掺杂电极用于声电氧化体系的作用因素,结果表明,在功率为49.58W/cm2、频率为50Hz、阳极电极为La-PbO2/Ti电极、电流密度为71.43mA/cm2、硫酸钠为14.2g/L的条件下,200mg/L的亚甲基蓝模拟废水经过2h后去除率达到89.51%.通过GC-MS、IC等分析手段检测了中间产物,提出了亚甲基蓝可能的降解途径.
A novel lead dioxide electrodes co-doped with rare earth（La2O3） and polytetrafluoroethylene（PTFE） were prepared by the electrochemical deposition and applied as anodes for the degradation of typical dye wastewater（methylene blue） in the sono-electrochemical system.The sono-electrochemical syngestic factors are respectively 1.29 and 1.36 by using PbO2/Ti and La-PbO2/Ti as anode.Further different effects containing vary electrodes,ultrasonic frequency,power,pollutant concentration,electrolyte concentration,current intensity were investigated,the result showed that the removal of 200mg/L methylene blue reached to 89.51% under the condition of 49.58W/cm2 power,50Hz frequency,La-PbO2/Ti used as the anode,71.43mA/cm2 current density,14.2g/L sodium sulfate after reaching 2h.The intermediates were monitored by the methods of GC-MS,IC,and then the degradation pathways were proposed.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2012年第5期855-862,共8页
China Environmental Science
基金
国家科技支撑计划(2011BAE07B09)
高等学校博士学科点专项科研基金(20113317120004)
浙江省自然基金(Y5090272)
浙江省重点科技创新团队项目(2011R09048-04)
关键词
声电氧化
协同效应
降解机理
sono-electrochemical oxidation
synergy effect
degradation mechanism
