铁-柠檬酸，铁-酒石酸，铁-丁二酸，铁-草酸配合物在高压汞灯（λmax＝313nm，250W）的照射下，能使活性艳红X－3B染料水溶液脱色。染料初始浓度在10mg／L～50mg／L时，染料脱色为动力学一级反应，脱色速率随初始浓度增大而降低。在pH2．0～3．0时铁-柠檬酸，铁-滴石酸，铁-丁二酸的染料溶液脱色效果较佳，在pH4．0时铁-草酸的染料溶液脱色效果最好。铁／羧酸盐配比对染料脱色速率也有影响。 The iron-citric acid, iron-tartaric acid, iron-succinic acid and iron-oxalate complex can decolorize the reactive brilliant red X-3B dye solution under the irradiation of high pressure mercury lamp (λmax = 313nm, 250W) At the initial dye concentration of 10mg / L ~ 50mg / L, the decolorization of the dye was a kinetic first-order reaction, and the decolorization rate decreased as the initial concentration increased. At pH 2.0 ~ 3.0, the decolorization of iron-citric acid, iron-drip acid and iron-succinic acid dye solution is better. At pH 4.0, the iron-oxalic acid dye solution has the best decolorization effect. The iron / carboxylate ratio also has an effect on the dye decolorization rate.