偶氮染料在无机盐存在下的光催化氧化降解反应  

PHOTOCATALYTIC DEGRADATION OF AZO DYES IN THE PRESENCE OF INORGANIC SALTS

作　　者：董永春[1] 李春辉[1] 陈佳莉[1] 白清[1] 李仁浩[1] 

机构地区：[1]天津工业大学材料科学与化学工程学院,天津300160

出　　处：《太阳能学报》2007年第5期522-526,共5页Acta Energiae Solaris Sinica

基　　金：天津市高等学校科技发展基金项目(20031007);天津市自然科学基金资助项目(043605911);中国科学院生态环境研究中心环境水化学国家重点实验室开放基金项目(2005-01)

摘　　要：利用草酸铁/过氧化氢体系在光反应器中对6种偶氮染料进行了光催化氧化脱色反应,重点研究了氯化钠和硫酸钠对其光催化氧化脱色性能的影响。同时通过紫外可见光谱和TOC分析考察了染料在无机盐存在下的光催化降解和矿化问题。结果表明两种无机盐对染料的脱色降解和矿化反应均有不同程度的抑制作用,其中氯化钠的抑制影响作用最为显著。Two inorganic salts including sodium chloride and sodium sulphate were used for investigating their effects on photocatalytic decoloration of six azo dyes in water based on Fe （ Ⅲ ）-oxalate complexes/H2 O2 system in a photo-reactor. Also the photocatalytic degradation and mineralization of the dyes was examined by UV-vis spectrum and TOC measurements. The results indicated that photocatalytic decoloration of the dyes is significantly limited in the presence of inorganic salts. Increasing concentration of inorganic salts in water can give rise to reducing decoloration efficiency and kinetic reaction constants of the dyes. Sodium chloride exhibits much stronger inhabiting power on photocatalytic degradation and mineralization than sodium sulphate at the same reaction condition.

关 键 词：偶氮染料 无机盐 降解 草酸铁/过氧化氢 

分 类 号：TK511.4[动力工程及工程热物理—热能工程]