摘要
针对黄浦江和长江原水,通过臭氧化小试实验研究副产物溴酸根(BrO3-)的生成.结果表明,黄浦江原水中含溴离子(Br-)较少,生成的BrO3-超标风险较低;而长江原水中Br-含量较高,为103.5μg/L;1.6 mg/L初始溶解O3、pH 7.3、Br-100μg/L、25℃条件下,长江原水臭氧化30 min后生成了15.2μg/L BrO3-,超过国家标准10μg/L(GB 5749—2006)的限值规定.调低pH值、减少初始O3浓度、降低温度均有利于控制BrO3-的生成.长江原水臭氧化过程中ct值和BrO3-生成量之间线性关系较好.实验中OUT指标与BrO3-生成量的线性关系不明显,不可代替ct作为衡量BrO3-的标准.
A series of bench-scale experiments was conducted in order to study the bromate（BrO3- ） formation during ozonation process by using raW water from the Huangpu River and the Yangtze River. The results showed that the bromide（Br^- ） level was very low in the Huangpu River raw water, thus leading to very low risk of violating national standards in terms of bromate formation by ozonation treatment. However, bromide ion （Br-） as high as 103.5 μg/L was found in the Yangtze River raw water. Ozonation tests indicated that 15.2μg/L of BrO3- was formed after 30 minutes of contact time when the dissolved ozone, pH , initial Br^-, and temperature were 1.6mg/L, 7.3, 100/tg/L and 25 ℃ respectively, which was higher than 10 μg/L, the limit defined by the national standard GB 5749--2006. Results also demonstrate that BrO3- formation could be well controlled by decreasing the values of operating pH, initial O3 concentration and/or temperature. Furthermore , the linear relationship was observed between ct value and bromate production during ozonation process in Yangtze River raw water, while the linear relationship was not observed between OUT value and bromate production during experiments, which implied that OUT could not be used to calculate bromate production as ct.
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2009年第8期64-68,共5页
Journal of Hunan University:Natural Sciences
基金
国家自然科学基金资助项目(50878163)
国家水体污染控制与治理科技重大专项项目(2008ZX07421-001)
关键词
溴酸根
臭氧化
长江
黄浦江
bromate
ozonation
the Yangtze River
the Huangpu River
