催化臭氧氧化过程中溴酸盐的生成机制研究

以黄河下游某水厂滤后水为目标物,选择了9种催化剂,在间歇反应装置中研究了单独臭氧和催化臭氧氧化过程中溴酸盐（BrO 3-）的生成情况,结果表明,在催化臭氧氧化过程中,NiO、CuO、Fe3O4、Al2O3加入使BrO 3-质量分数分别降低34.0%、32.8%、29.2%、20.8%.选取Fe3 O4作为催化剂研究催化...

Study on Bromate Formation of Catalytic Ozonation Process

In a batch reactor, the BrO^-₃ formation was investigated in the ozonation and catalytic ozonation of Br^--containing Yellow river water, using the different heterogeneous catalysts. The results showed that BrO^-₃ minimization was achieved in the catalytic ozonation with NiO, CuO, Fe₃O₄ and Al₂O₃ as catalysts and the percent reductions of BrO^-₃ were 34.0%, 32.8%, 29.2% and 20.8% respectively. In the reaction R_ct, the ratio of concentration of ·OH to O₃, decreased with the reaction time, and the range of R_ct was from 10^-8 to 10^-6. In the ozonation process, one of the main reaction pathways of BrO^-₃ formation was the combination oxidation of Br^-by ·OH and then O₃, another was the combination oxidation of Br^- by O₃ and then ·OH. In the catalytic ozonation with Fe₃O₄ catalyst, the main pathway was the combination oxidation by ·OH and then O₃. Moreover, about 60.7% removal for UV₂₅₄ was obtained after 20 min in the catalytic ozonation reaction. In our study, it was found that the catalytic ozonation process can effectively minimize the formation of BrO^-₃ and also oxidize organic compounds.