摘要
选择8种不同结构的含氮染料作为研究对象,对染料中不同形态氮(—NH2、—NO2、—NN—、—CN—)的TiO2光催化降解行为以及矿化生成NO-3和NH+4之间的关系进行了研究.采用离子色谱测定了染料降解矿化生成NO-3和NH+4的含量,并对甲基橙光降解的中间产物进行了GC-MS分析.实验结果表明,在TiO2/UV反应体系中,染料中有机氮的降解既有氧化反应存在,又有还原反应发生.染料中不同形态的有机氮,均可通过不同反应路径被还原矿化为NH+4.
Eight dyes with different nitrogen structures were selected as the target compounds. The photocatalyticdegradation of the different forms of nitrogen （-NH2 ,-NO2 ,-N =N-,-C=N-） in the dyes wasstudied and the relationship of NO3- and NH4＋ produced from different forms of nitrogen was also discussed.NO3- and NH4 produced from the photochemical degradation process were determined by ion chromatographyand the intermediate products of methyl orange were determined by GC-MS. The results showed that nitrogen atoms in the dyes were either oxidated or reduced by TiO2/UV. The different forms of nitrogen were mineralized to NH4＋ by different reduction reaction path ways.
出处
《环境化学》
CAS
CSCD
北大核心
2013年第10期1846-1850,共5页
Environmental Chemistry
基金
国家自然科学基金资助项目(50978208/E0804)资助
关键词
染料
不同形态的氮
矿化路径
TIO2
UV
dyes, the different forms of nitrogen, mineralization path, TiO2/UV.
