Effects of organic matter, ammonia, bromide, and hydrogen peroxide on bromate formation during water ozonation

文献类型： 外文期刊

第一作者： Wang, Yongjing

作者： Wang, Yongjing;Man, Tao;Zhang, Ruolin;Yan, Xinyu;Wang, Songtao;Zhang, Minglu;Wang, Pan;Ren, Lianhai;Wang, Yongjing;Wang, Yongjing;Yu, Jianwei;Li, Cheng

作者机构：

关键词： Bromate; Ozone; Hydrogen peroxide; Ammonia; Organic matter; Drinking water

期刊名称：CHEMOSPHERE （ 影响因子：7.086； 五年影响因子：6.956 ）

ISSN： 0045-6535

年卷期： 2021 年 285 卷

页码：

收录情况： SCI

摘要： Ozone is widely applied for disinfection in drinking water treatment and the disinfection by-product bromate would be produced during the ozonation of bromide-bearing water. Hydrogen peroxide (H2O2) addition could effectively control the formation of bromate. However, the bromate depression performance would be impacted by water qualities. In this study, typical source water containing bromide in eastern China was selected to investigate bromate depression effect under different organic matter, ammonia and bromide concentrations during the H2O2-O-3 process. The results display that organic matter, ammonia and bromide concentration could influence the formation of bromate significantly. As tyrosine was applied to increase the dissolved organic carbon (DOC) concentration of source water by 2.0 and 3.0 mg/L, the total concentration of bromate produced decreased gradually as the H2O2/O-3 (g/g) doses increased from 0 to 1.0 and bromate concentration could be controlled below 10 mu g/L as H2O2/O-3 (g/g) was 0.5 and 1.0. As ammonia concentration increased by 0.1 and 0.5 mg/L, lower H2O2/O-3 (g/g) doses would lead to an increase in bromate generation. As more H2O2 was added in water, the bromate formation would be suppressed. The increase of bromide concentration induced higher bromate formation. When the bromide concentration increased by 50 and 200 mu g/L, bromate concentration was 10.7 mu g/L and 41.2 mu g/L respectively at the H2O2/O-3 (g/g) of 1.0, higher than the standard level. As 200 mu g/L of bromide was added to the water, bromate concentration increased significantly and then decreased as H2O2/O-3 (g/g) increased and more H2O2 would be needed for bromate control.

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