电解法处理硝基苯废水研究

以提高电解处理工艺的效率、降低处理成本、易于实现工业化为目标,筛选出适合硝基苯废水处理的高效电极材料,考察了电解法处理模拟硝基苯废水的各种影响因素,并在此基础上对电解法降解模拟硝基苯废水的过程进行了初步探讨。研究结果表明:以铁作电极,在电极间距为5 mm,电流密度为10 mA/cm2,硫酸钠投加量为1.5 g/L,水板比为12 m-1,电解时间为30 min的条件下对硝基苯模拟废水进行电解处理,硝基苯去除率可达90%以上;在铁电极电解作用下,硝基苯的降解78%是由氧化等作用去除,22%是在电还原作用下被转化为可生化和低毒的苯胺。

A Study on Treatment of Nitrobenzene Wastewater with Electrolysis

In the study,the high efficiency electrodes suitable for treating nitrobenzene wastewater were screened out for the purpose of improving electrolysis treatment efficiency,reducing the cost,and being easy to realize industrialization.The determining factors and the reaction mechanisms of treatment on simulated nitrobenzene wastewater by the electrolysis method were investigated.The results of experiments showed that in an iron electrode reactor,the removal efficiency of nitrobenzene compounds in wastewater could be over 90% when the distance of electrodes is 5 mm,and the current density is 10 mA/cm~(2), and the concentration of sodium sulfate is 1.5 g/L,and the ratio of water to board is 12 m~(-1),and the electrolytic time is 30 minutes.During the process of the reaction,78% nitrobenzene was oxidized,and the other 22% nitrobenzene was deoxidized and was converted into biodegraded and micro-toxic aniline.