摘要
为了研究光/电法在氨氮降解过程中的协同作用,采用光/电法降解模拟工业循环冷却水中的氨氮,并对氨氮降解过程中的各影响因素进行了研究,考察了氯离子浓度和溶液p H对降解效率的影响。结果表明,与传统的光催化法和电化学法相比,光/电法在氨氮降解过程中存在良好的协同效应,因而具有更高的氨氮去除率,这主要归功于溶液氯离子的促进作用。另外,在酸性条件下,氨氮降解效率得到进一步加强。当p H在4~5之间,电流密度为10 m A/cm2,Na Cl浓度为100 mg/L时,在经过90 min光/电法处理后氨氮去除率高达95%,且N2占总氨氮降解产物的84.2%。
In order to investigate the synergistic effect of photo-electrical method on the ammonia nitrogen degradation,photo-electrical method was used to degrade ammonia nitrogen from simulated industrial circulating cooling water. And the influences of various parameters such as Cl-concentration,p H value on the degradation effect were also investigated. Experimental results showed that compared to the traditional photocatalytic method and electrochemical method,the photo-electrical method represents excellent synergistic effect,leading to a much higher ammonia nitrogen removal rate,which can be attributed to the facilitation of Cl-. In addition,degradation effect can be further enhanced under acidic conditions. For example,at a p H value of about 4 ~ 5,current density 10 m A / cm2,Na Cl concentration 100 mg /L,the ammonia nitrogen removal rate can reach as high as95% in 90 min,and 84. 2% of total ammonia nitrogen degradation products is N2.
出处
《环境工程学报》
CAS
CSCD
北大核心
2015年第1期150-156,共7页
Chinese Journal of Environmental Engineering
基金
国家国际科技合作专项(2013DFG50150
2011DFB91-560)
广东省对外科技合作项目(2011B050200004)
关键词
氨氮
循环冷却水
光/电法
协同作用
电流密度
ammonia nitrogen
circulating cooling water
photo-electrical method
synergistic effect
current density
