Fenton试剂与染料溶液的反应

The Reaction of Fentons Reagent and Dye Solution*

Ｆｅｎｔｏｎ试剂与酸性、活性、直接、阳离子、分散和还原６类１８种染料反应时，前４类染料在１８０ｍｉｎ内完全脱色，ＴＯＣ浓度均显著下降．后２类染料的脱色率很低，ＴＯＣ浓度降低不多．研究了不同金属离子与紫外光的催化下，Ｈ２Ｏ２对染料罗丹明Ｂ溶液的氧化反应．催化的结果为：Ｆｅ２＋／ＵＶ＞Ｃｕ２＋／ＵＶ＞Ｆｅ２＋＞Ｃｕ２＋＞Ｍｎ２＋／ＵＶ＞Ａｇ＋／ＵＶ＞Ｍｎ２＋＞Ａｇ＋．通过与还原蓝ＲＳＮ溶液的反应，表明Ｆｅｎｔｏｎ／ＵＶ体系中的反应程度大于Ｆｅｎｔｏｎ及Ｈ２Ｏ２／ＵＶ２种体系中反应程度的加和。

kinds of dye solution, including 6 species of cationic, direct, reactive, acidic, reductive and disperse dye were reacted with Fentons reagent. The four formers were decolorized and the concentrations of TOC of them were decreased during 180 min.On the contrary the colority and the TOC of the two latters were reduced lightly. The catalytic function of different metal ions and UV light on the decomposite of Rodamine B was in the sequence of Fe2+/UV>Cu2+/UV>Fe2+>Cu2+>Mn2+/UV>Ag+/UV>Mn2+>Ag+.Vat Blue RSN dye solution was degradated by Fentons reagent, Fenton/UV and H2O2/UV. The oxidation by Fenton/UV was the strongest and even stronger than the arithmetic sum of the other two, which means the synergistic effect of UV and Fe2+ on the function of H2O2.