摘要
采用悬浮态光催化反应系统,以含氮模拟废水为处理对象,考察了光催化过程中光照时间、pH值和甲酸浓度对氮素形态变化规律的影响。结果表明,当光照时间小于90 min时有利于氮素的氧化,随着光照时间的延长有利于氮素的还原;酸性条件下有利于氮素的还原,碱性条件下有利于氮素的氧化;甲酸是一种优良的还原剂,甲酸加入量小于50 mmol/L时有利于氮素的还原,大于50 mmol/L时有利于氮素的氧化。
Taking the nitrogenous wastewater as the study object in photocatalytic process,the effect of irradiation time、pH value and formic acid concentration are introduced on nitrogen translation.The results showe that, the irradiation time less 90 min is beneficial to the oxidation of nitrogen, with the extension of irradiation time the condition is beneficial to nitrogen reduction; acidic conditions are beneficial to the reduction of the nitrogen, alkaline conditions are beneficial to the oxidation of nitrogen;the formic acid is a good reducing agent,the concentration of formic acid less 50 mmol/L is beneficial to the reduction of the nitrogen, greater than 50mmol/L is beneficial to the oxidation of nitrogen.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第S1期125-128,共4页
Environmental Science & Technology
关键词
含氮废水
光催化
脱氮
迁移转化
nitrogenous wastewater
phtocatalytic catalysis
denitrification
transformation
