摘要
在钨冶炼生产当中,大部分企业采用碱煮-离子交换工艺,会产生大量含盐的工业废水。本文在对钨冶炼过程产生的废水进行分析研究后,利用电化学法处理废水,降低其中的COD和氨氮至达标后排放,研究结果表明:废水初始pH处于5-7范围内电氧化反应效果较好;电流密度越大,电化学氧化反应效果越好;接触反应时间越长,电氧化反应越充分,废水当中的COD和氨氮同时去除的效果越好;在高盐含量的情况下,有利于电化学反应的进行,收获了较好的除杂反应效果。
In tungsten smelting production,most enterprises adopt alkali cooking-ion exchange process,which will produce a large amount of industrial wastewater containing salt.In this paper,after analyzing and studying the wastewater produced in tungsten smelting process,the wastewater is treated by electrochemical method,and the COD and ammonia nitrogen in it are reduced to the standard before being discharged.The results show that:The initial pH of wastewater is in the range of 5-7,and the electro-oxidation reaction is better;The greater the current density,the better the electrochemical oxidation reaction effect;The longer the contact reaction time,the more complete the electro-oxidation reaction,and the better the effect of removing COD and ammonia nitrogen from wastewater at the same time;Under the condition of high salt content,it is beneficial to the electrochemical reaction,and a good effect of impurity removal reaction is obtained.
作者
丁伟
Ding Wei(Jiangxi Xiushui Ganbei Tungsten Industry Co.,Ltd.,Jiangxi,332422)
出处
《当代化工研究》
2020年第22期79-80,共2页
Modern Chemical Research
关键词
钨冶炼废水
电化学反应
氨氮
COD
tungsten smelting wastewater
electrochemical reaction
ammonia nitrogen
COD
