Studies on photochemical and photocatalytic synergistic decoloration of brilliant red X-3B solution

The photocatalytic and photolytic decoloration reactions of aqueous brillia nt red X-3B solution were studied. The experimental results showed that the reaction rate was increased with increasing UV light intensity, and decrea sed with increasing the initial X-3B concentration. An optimized content of the catalyst in solution was found at 4 g/L and an optimized air flow was found at 4.3 L/h. Particularly, the photolysis was found during the photoca talytic decoloration of aqueous X-3B solution, though its effect on the rea ction was far inferior to that of photocatalytic decoloration, so the decol oration of aqueous brilliant red X-3B solution is a concerted reaction of p hotolytic and photocatalytic decoloration in the range of pH = 3 similar to 11.