摘要
目前在电化学氧化处理法降解苯酚废水的研究过程中,研究者多将重心放在活性电极的探索及制备上,而对于反应器的开发鲜有报道。就这一问题,本文研究了新型微流控反应器中苯酚的电化学降解效果。电化学氧化实验在装有Ti/SnO2-Sb2O5阳极的微型流通池中操作进行,实验对循环体系的体积流率ΦV、电极间距h的影响进行了考察。结果表明,当流通电解槽中的阴阳极间距采用微米级尺寸时,苯酚的阳极氧化反应取得了较快的氧化速度。在i=20 m A/cm2、ΦV=0.54 m L/min的电解条件下,电解2~3h苯酚去除率即可达到90%以上,相同流速下电极间距h越小降解速率越快。且由数据回归得到了苯酚的一系列随h的减小而增大的准一级反应的反应速率常数。这一结论表明微流控电解槽内的苯酚降解过程主要传质控制过程。
At present,most researchers focus on the exploration and preparation of the active electrode in the study of degradation of phenol. The development of new type of reactor has been rarely reported. A microfluidic reactor was used to determine the effects of the structure on the degradation of phenol. The electrochemical oxidation of phenol was performed in a micro flow cell equipped with a Ti/Sn O2-Sb2O5 anode,and the effects of volume flow rate,inter-electrode gap were investigated. The results demonstrated that a flow cell with a micro-matric distance between cathode and anode can be used to perform the electrochemical treatment of water contaminated by phenol with high removal. A high removal of phenol up to 90% was achieved under the suitable experimental conditions in 2—3h,and the pseudo-first order rate constant of phenol removal was determined from the model.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2015年第10期3785-3789,共5页
Chemical Industry and Engineering Progress
