还原铁粉/紫外光体系对活性艳红X-3B溶液的脱色

Decoloration of aqueous reactive dye solution in Fe^0/UV system

研究了在紫外杀菌灯（λmax=253．7nm，30W）照射下，添加还原铁粉的活性艳红X－3B水溶液的脱色作用。当pH=3．5，铁粉投加量为2．0g／L时，20mg／L活性艳红X－3B溶液在光照180min后的脱色率为79％。脱色为动力学零级反应。染料溶液的pH、铁粉投加量、活性艳红初始浓度对脱色有影响。初步探讨了脱色反应的机理。

Decoloration of aqueous dye C. I. reactive red 2 in Fe0/UV system was studied. Under the condition of pH= 3. 5, iron powder dosage= 2. 0 g/L, the decoloration efficiency of 20 mg/L dye solution reached 79 % after illumination of 180 minutes. The decoloration reaction is a zero order.