铁碳微电解-Fenton法预处理苯胺基乙腈生产废水的动力学研究

通过采用铁碳微电解-Fenton法预处理苯胺基乙腈生产废水的实验研究,分析了处理过程的COD降解动力学;同时研究了单纯活性炭吸附和微电解过程中COD去除率的变化。结果表明,铁碳微电解的初期COD降解过程近似符合一级反应动力学,并且得到微电解与活性炭吸附对铁碳微电解降解COD的关系式;Fenton反应中通过研究有机物浓度和过氧化氢初始浓度与反应进程的关系,建立了反应动力学模型;单纯吸附实验COD去除率在24 h内快速下降,而微电解在相应时间内COD去除率波动较小,为实际应用提供了数据经验和理论依据。

Study on kinetics of n-phenylglycinonitrile wastewater pre-treatment by iron-carbon micro-electrolysis and Fenton reagent

The degradation kinetics of COD was analyzed by studying n-phenylglycinonitrile wastewater pre-treatment using micro-electrolysis and Fenton process.Moreover,changes of COD removal rate were studied in the process of simple AC adsorption and micro-electrolysis respectively.The results showed that,initial COD degradation process by micro-electrolysis obeys approximately the pseudo-first-order reaction kinetics,and relation of COD degradation by micro-electrolysis was obtained,which explained the relationship between micro-electrolysis and activated carbon adsorption.By studying the relationship between organic matter concentration,initial concentration of hydrogen peroxide and reaction process in Fenton reaction,a reaction kinetics model was established.COD removal rate of simple AC adsorption rapidly decreased within 24 h,while micro-electrolysis reaction had small fluctuation,which can provide data experience and theoretical basis for practical applications.