中文摘要：

针对含溴离子（Br^-）的长江原水,通过臭氧化小试实验研究氨氮、pH、O3投加量和水温对副产物溴酸根（BrO^-3）的生成影响.结果表明,实验条件下（pH 7.35、氨氮背景浓度0.6 mg/L）,投加氨氮对原水中BrO^-3形成的抑制作用有限,初步分析氨氮无法屏蔽BrO3^-的间接-直接生成途径.O3投加量在0.8-2.5 mg/L的试验范围内,为保证BrO^-3不超标,初始溶解O3须在1.2mg/L以下.BrO3^-的形成对pH变化很敏感,pH调低到6.3,30 min生成量降低至8μg/L.降低温度,O3稳定性升高,BrO^-3浓度亦显著降低,10℃时100μg/L Br^-在初始1.6 mg/L溶解O3浓度条件下,BrO^-3生成量为9.1μg/L.

英文摘要：

A serial bench-scale experiments were conducted to study the effect of ammonia, pH, initial dissolved ozone and temperature on bromate formation during ozonation process in Yangtze river water, where bromide anion（Br^- ） was detected. Ammonia has little suppression effects on bromate production in Yangtze water at pH 7.35 and 0.6 mg/L ammonia background concentration, for it can＇t block the indirect- direct path. Within our experiment＇s conditions, at the initial dissolved ozone from 0.8 mg/L to 2.5 mg/L, it should be kept below 1.2 mg/L in order to avoid bromate standard violation. BrO3^- formation is sensitive to pH variation. BrO3^- production is 8 μg/L when pH decreases to 6.3. Lower temperature leads to both slower ozone decomposition and lower production of bromate. BrO3^- production is 9.1 μg/L at 10℃, 100 μg/L initial Br^- and 1.6 mg/L initial dissolved ozone.