含溴黄浦江水臭氧化过程中溴酸根的生成

上海大学学报(自然科学版) ›› 2010, Vol. 16 ›› Issue (5): 498-502.

含溴黄浦江水臭氧化过程中溴酸根的生成

1.上海大学环境与化学工程学院，上海 200444；2.上海城市水资源开发利用国家工程中心有限公司，上海 200082

收稿日期:2010-05-28 出版日期:2010-10-30 发布日期:2010-10-30
通讯作者: 丁国际(1955～)，男，教授，博士生导师,博士,研究方向为水处理理论与技术. E-mail:gjding@shu.edu.cn
基金资助:
国家科技重大专项资助项目（2008ZX07421002）；国家自然科学基金资助项目（50908138）；上海市重点学科建设资助项目(S30109)

Bromate Formation During Ozonation in Bromide-Containing Huangpu River Water

1. School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China; 2. Shanghai Engineering Research Center of Urban Water Resources, Shanghai 200082, China

Received:2010-05-28 Online:2010-10-30 Published:2010-10-30

摘要/Abstract

摘要：

2010年1—6月的水质调查结果表明，黄浦江水中溴离子（Br^-）含量为204.9~394.6 μg/L.溴离子在臭氧氧化和氯消毒工艺中消耗显著，但在混凝工艺中变化很小.水厂溴酸根离子（BrO^-₃）检出率较低（7.5％）.经过生物活性炭（biological activated carbon,BAC）处理后的出水溴离子有一定增加，可能源于活性炭还原了经臭氧氧化形成的高价态溴.臭氧小试实验表明，当黄浦江原水中稳态溶解臭氧浓度大于0.23 mg/L时，溴酸根离子生成速率大幅度增加，但此后随着臭氧浓度的增加，溴酸根生成速度几乎不变.臭氧暴露值ct与BrO^-₃具有良好的线性关系，计算得到的溴酸根生成势k(μgBrO^-₃/(mgO₃·min))受水中稳态溶解臭氧浓度值影响较大.原水中高浓度的氨氮和有机物是抑制溴酸根离子在臭氧化过程中形成的主要因素.

关键词: 溴酸根；臭氧；溴离子；黄浦江；氨氮

Abstract:

Bromide (Br^-) in Huangpu river water was detected within the range of 204.9~394.6 μg/L, as a result of investigation conducting from January to June, 2010. Noticeable bromide was consumed at ozonation and chlorine disinfection, whereas nearly no removal was found in coagulation. However, bromate detection rate was very low (7.5%). Bromide increased after contacting with fresh biological activated carbon （BAC）, which may result in reduction of high valence bromine by activated carbon. Batch experiment of ozonation was conducted. Formation rate of bromate increased significantly when steady state concentration of dissolved ozone was beyond 0.23 mg/L, and increased a little when concentration of dissolved ozone further increased. There is good linearity between ozone exposure (ct) and bromate amount. Bromate formation potential (k, μgBrO^-₃/(mgO₃.min)) is influenced greatly by concentration of dissolved ozone. High level of ammonia and dissolved organic carbon (DOC) in raw water are the main factors inhibiting bromate formation during ozonation. 

Key words: bromate; ozone; bromide; Huangpu river; ammonia

中图分类号:

TU 991

黄鑫1 梅红1 丁国际1 卢宁2. 含溴黄浦江水臭氧化过程中溴酸根的生成[J]. 上海大学学报(自然科学版), 2010, 16(5): 498-502.

HUANG Xin-1, MEI Hong-1, DING Guo-Ji-1, LU Ning-2. Bromate Formation During Ozonation in Bromide-Containing Huangpu River Water[J]. Journal of Shanghai University（Natural Science Edition）, 2010, 16(5): 498-502.