中文

Journal of Shanghai University（Natural Science Edition） ›› 2010, Vol. 16 ›› Issue (5): 498-502.

• Environmental and Chemical Engineering • Previous Articles     Next Articles

Bromate Formation During Ozonation in Bromide-Containing Huangpu River Water

  

  1. 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

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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

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