铁-锰-碳微电解法处理对苯二酚废水

在传统铁-碳微电解填料(简称铁-碳填料)中加入锰粉进行改性,制备了规整化铁-锰-碳改性微电解填料(简称铁-锰-碳填料),并采用该填料处理质量浓度为1 000 mg/L的模拟对苯二酚废水。实验结果表明:在铁-锰-碳填料投加量25.0 g/L、反应时间4.0 h、锰粉质量分数9%、初始废水pH为3的最佳工艺条件下,对苯二酚去除率达95.55%;与铁-碳填料相比,铁-锰-碳填料可大幅提高对苯二酚的去除率,且对废水pH的适应范围较宽;采用铁-锰-碳填料处理对苯二酚废水的过程中,废水pH大体呈现先上升后下降的趋势;由降解中间产物可推断对苯二酚首先被氧化为对苯醌,然后逐渐降解为有机酸。

Treatment of Hydroquinone-Containing Wastewater by Fe-Mn-C Microelectrolysis Process

The regular modified Fe-Mn-C microelectrolysis packing（Fe-Mn-C packing） was prepared by adding manganese powder into the traditional Fe-C microelectrolysis packing（Fe-C packing）,and was used in treatment of the simulation wastewater with 1 000 mg/L of mass concentration. The experimental results show that: Under the optimum conditions of Fe-Mn-C packing dosage 25.0 g/L,reaction time 4.0 h,Mn mass fraction 9% and initial wastewater pH 3,the removal rate of hydroquinone is 95.55%;The removal rate of hydroquinone on Fe-Mn-C packing is greatly improved and the adaptation range of wastewater pH is also widened;The wastewater pH rises first and then declines during the treatment of hydroquinone wastewater using Fe-Mn-C packing. According to intermediates,the process of hydroquinone degradation can be concluded as follows: hydroquinone is oxidized into benzoquinone at first,and then is gradually degraded into organic acid.