摘要
研究了甲基橙在S2O82-+UV体系中的降解情况,在pH=1,反应8 m in时,5μmol/L的甲基橙色度去除率达100%,2 h时,TOC去除率为9.5%;同时用紫外光谱、HPLC对降解过程进行了分析.结果表明,S2O82-+UV体系中起主要作用的是SO4-.,SO4-.可由S2O82-和紫外线或Ag+作用生成,具有极强的氧化能力,电极电位为E0SO4-./SO42-≥3.4V(vs SCE),它可有效破坏复杂有机物的结构,也具有一定的聚合引发作用,但其活泼性不如.OH.
The degradation process of methyl-orange in S2O8^2- ＋ UV system is studied with UV spectrum and HPLC analysis, respectively. When pH = 1, the decolorization efficiency of 5μmol/L methyl-orange solution is up to 100% after the 8 min reaction and removal efficiency of TOC is up to 9.5% 2 h later. The results indicate that SO4^-·plays the main role in degradation process. Under ultraviolet radiation or reacting with Ag^＋ ions, S2O8^2- decomposes to SO4^-·, which exhibits higher oxidation ability with electric potential E0SO4^-·/SO4^2-≥3.4 V（vs SCE）. SO4^- can destroy the structure of complex organics and initiate polymerization at the same time, but has lower activity than that of·OH.
出处
《哈尔滨工业大学学报》
EI
CAS
CSCD
北大核心
2006年第4期636-638,共3页
Journal of Harbin Institute of Technology
基金
国家自然科学基金资助项目(20577004)
关键词
过二硫酸根
紫外线
硫酸根自由基
甲基橙
peroxydisulfate
ultraviolet radiation
sulfate radical anion
methyl-orange
