光助类Fenton-柠檬酸体系对甲基紫的脱色研究

Study on Photodecolorization of Methyl Violet by Photo/Fenton/Citric Acid System

以柠檬酸为活化剂,进行了类Fenton反应光解甲基紫的试验,研究了利用UV-H_2O_2-Fe^(3+)-柠檬酸体系对甲基紫进行脱色的各种影响因素。试验结果表明,Fe^(3+)、H_2O_2、柠檬酸浓度均能影响染料脱色,柠檬酸在反应过程中起到活化剂的作用。在甲基紫浓度为40mg/L时,其脱色的适宜条件为3%H_2O_2,100mg/L Fe^(3+),90mg/L柠檬酸,体系pH值约为3,其脱色率可达到80%以上。

Methyl violet was photograded under the condition of UV light and using citric acid as activator. Using UV-H2O2-Fe^3＋-citric acid system for decoloring various influence factors of methyl violet in the present study. The test results show that Fe^3＋,H2O2,citric acid can affect dyes decolorizing,citric acid have the effect of activator in the reaction process.When the concentration of methyl violet is 40mg/L,the suitable conditions of decoloration of system are as follows：3% H2O2,100mg/L Fe^3＋,90mg/L citric acid and pH =3. Its decolorization rate can reach more than 80%.