Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2014, Vol. 25 ›› Issue (1): 010301 doi: 10.13538/j.1001-8042/nst.25.010301


Bromate formation in bromide-containing waters irradiated by gamma-rays

ZHOU Yan,  CAO Chang-Qing,  WANG Min   

  1. 1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Contact: CAO Chang-Qing
  • Supported by:

    Supported by National Natural Science Foundation of China (No. 10979020)

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ZHOU Yan, CAO Chang-Qing, WANG Min. Bromate formation in bromide-containing waters irradiated by gamma-rays.Nuclear Science and Techniques, 2014, 25(1): 010301     doi: 10.13538/j.1001-8042/nst.25.010301


The formation of bromate, a classified potential carcinogen, is of great concern when disinfection processes are used for treating high-bromide drinking waters. Bromide-containing aqueous solutions with various additives were irradiated by 60Co source. With a 2:0 kGy irradiation of N2O-saturated solutions at initial bromide concentrations of 180:2 μg/l, 416:9 μg/l, 663:1 μg/l and 823:9 μg/l. 79.5%, 84.0%, 87.3% and 88.3% of bromide ions were transformed to bromate, respectively. Addomg CO3 2–/HCO3 – or NO3 – ions into N2Osaturated bromide solutions, the amount of bromate ions formed decreased with increasing concentrations of the additives. On the other hand, the bromate concentration was all below the detection limit of 1 μg/l whenever N2O was not added to quench eaq – and H. The results indicated that -rays irradiation could be used as a disinfection process, instead of ozonation, to comply with upcoming more stringent regulations, especially in waters containing high concentrations of bromide.

Key words: Bromide, Bromate, Gamma irradiation, Disinfection