Impact of Different Buffer on Decomposition of Ozone in Aqueous Solution

At the same ozone dosage and temperature,by changing buffer concentration the degradation of ozone and benzoic acid was studied with pH=3.0,4.7(acetate buffer),pH=7(phosphate buffer),pH=11(carbonate buffer).The results indicated that the acetate buffer system with some oxygen would hinder the decomposition of ozone and inhibit the generation of hydroxyl radical at pH=3.0,4.7.The phosphate buffer has no effect on ozone natural decomposition at pH=7.The carbonate buffer system is similar to acetate buffer system but the inhibition of carbonate buffer system on the ozone decomposition is more significant than acetate buffer system.