摘要
考察了不同反应条件下，电絮凝法对微污染水中氨氮的去除效果及其影响因素，并探究了反应机制。结果表明：电絮凝法对于微污染水中的氨氮有较好的去除效果，且去除率随着电流密度和电解时间的增加而提高；初始pH过高或者过低都不利于氨氮的去除，在弱碱性时去除效果最佳；静沉时间对去除率的影响甚微。在电流密度为3．42mA／cm2、电解时间为30min、初始pH为7．O～9．0、静沉时间为20min的条件下，电絮凝法对微污染水中的氨氮具有最佳去除效果。
Removal efficiency of ammonia nitrogen and its influencing factors were investigated under different reaction conditions. The mechanism was also studied additionally. The results showed that the removal efficiency of ammonia nitrogen by electrocoagulation method was quite satisfactory and increased by the elevation of current densi- ty and electrolytic time. High acid or alkaline conditions were all adverse to the removal efficiency while alkalescene condition was the most appropriate. Sediment time only had slight impact on the removal efficiency. Under the condi- tions of current density of 3.42 mA/cm2 ,electrolytic time of 30 min,initial pH of 7.0-9.0, sediment time of 20 min, the best removal efficiency of ammonia nitrogen for micro-polluted water was achieved.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2016年第6期15-19,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.21376180)
上海市国际合作项目(No.14230710800)
青浦区-同济大学科技合作项目(No.20143289)
中央高校基本科研业务费专项(No.2870219026)
关键词
电絮凝
微污染水
氨氮
electrocoagulation
micro-polluted water
ammonia nitrogen
