Fe/Cu催化内电解-Fenton法联合处理三氯乙酸废水的研究

采用Fe/Cu内电解-Fenton法联合处理三氯乙酸废水。考察了Fe与Cu质量比、pH值和H2O2投加量等因素对废水处理效果的影响。确定了联合处理法的最佳工艺条件:催化内电解过程中Fe与Cu质量比为4:1、pH值为4、搅拌时间为50min;Fenton法阶段中pH值为4、H2O2加入量为10mL/L并分批投加、搅拌时间为40min。在最佳工况条件下,联合工艺处理质量浓度为100mg/L的三氯乙酸废水脱氯率达80.1%,COD去除率达78.4%。使用联合法处理废水,能有效提高处理效果,可以处理较高浓度的三氯乙酸废水。

Treatment of trichloroacetic acid wastewater by Fe/Cu catalyzed inner electrolysis-Fenton combined process

Fe/Cu inner electrolysis-Fenton combined process was used in treatment of trichloroacetic acid wastewater.The influence of iron-copper mass ratio,pH value,dosage of H2O2 and some other factors on wastewater treatment effect were investigated.The optimal condition for the combined process was determined as follows: in the phase of catalyzed inner electrolysis,the iron-copper mass ratio was 4:1,the pH value was 4,the stirring time was 50min;in the phase of Fenton process,the pH value was 4,10mL/L of H2O2 was added in batches,the stirring time was 40min.Under the said operation condition,using the combined process to treat trichloroacetic acid wastewater whose mass concentration was 100mg/L,the removal rate of chlorine and COD reached 80.1% and 78.4% respectively.The combined process could effectively improve the wastewater treatment effect,therefore,it could be used in treatment ofhigh concentration trichloroacetic acid wastewater.