电化学法深度处理实验室废水的试验研究  

EXPERIMENTAL STUDY ON ADVANCED TREATMENT OF LABORATORY WASTEWATER BY ELECTROCHEMICAL METHOD

作　　者：周波[1] 王昊[1] 何绪文[1] 刘俐媛[1] 侯少沛[1] 张弓[1] 宫景雯[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《水处理技术》2010年第8期121-123,132,共4页Technology of Water Treatment

基　　金：国家高技术研究发展计划(863)项目(2009AA05Z306);北京市科技计划项目(D0706006060191)

摘　　要：采用电化学氧化法对实验室废水进行深度处理,考察了实验室二级出水中各主要污染物的去除效果,初步探讨了电化学法去除有机物及含氮化合物的主要化学反应历程。结果表明,恒定电流为5A,即电流密度为7.4mA·cm-2时,在不同电解时间下,投加NaCl后的平板电极对COD、NH3-N、TN和TP的最高去除率分别为84.4%、100%、90.9%、81.2%,高于未加NaCl的情况;投加NaCl的对各主要污染物的去除速率也较高。综合电耗等因素考虑,上述条件下电解时间30min时处理效果最佳。Electrochemical oxidation was used to treat laboratory wastewater. The removal effect of major pollutants of laboratory secondary effluent was mainly investigated and the main chemical reaction path of the removal of organic matter and nitrogen compounds by electrochemical method was discussed preliminarily. The results showed that, after adding NaCl the best removal ratio of COD, NH3-N , TN and TP was 84.4%, 100%, 90.9%, 81.2% respectively on the condition of different electrolysis time, constant current 5 A, namely the current density 7.4 mA·cm-2, and the effect was better than that without NaCl. The removal ratio of major pollutants was higher after adding NaCl, namely they were removed faster by electrolysis in the case that other experimental conditions remained unchanged. Comprehensive consideration of power consumption and so on suggested that the best operation condition was of definite salt concentration, constant current 5 A, namely the current density 7.4 mA·cm-2, electrolysis time 30 min.

关 键 词：电化学法 电解时间 NACL溶液 化学反应历程 

分 类 号：TQ035[化学工程] X703.1[环境科学与工程—环境工程]