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臭氧氧化四溴双酚A过程中溴离子和溴酸盐生成的影响因素

张丹丹1,2,于 鑫1,何士龙2   

  1. 1中国科学院城市环境研究所城市环境与健康重点实验室,福建 厦门 361021; 2中国矿业大学环境与测绘学院,江苏 徐州 221116
  • 出版日期:2012-06-05 发布日期:2012-06-25

Effect of different influence factors on Br- and BrO3- generation during ozonation of TBBPA

ZHANG Dandan1,2,YU Xin1,HE Shilong2   

  1. 1Key Laboratory of Urban Environment and Health,Institute of Urban Environment,Chinese Academy of Sciences,Xiamen 361021,Fujian,China;2School of Environment and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,Jiangsu,China
  • Online:2012-06-05 Published:2012-06-25

摘要: 为了研究控制四溴双酚A(TBBPA)臭氧化过程中溴酸盐生成的影响因素,通过实验对不同的水质参数和臭氧投加量条件下臭氧氧化TBBPA过程中溴离子(Br-)及溴酸根离子(BrO3-)的生成量进行了考察。结果表明,臭氧氧化TBBPA生成BrO3-分为两阶段:第一阶段为臭氧氧化降解TBBPA生成Br-,即Br-累积阶段;第二阶段为臭氧化Br-生成BrO3-,即BrO3-生成阶段。Br-及BrO3-的生成量随着TBBPA初始浓度的增加而增加,生成速率随臭氧投加量增加而提高。25~55 ℃条件下反应40 min后,BrO3-生成量随温度升高增加了4.5倍。pH值8~11内,pH值降低对Br-及BrO3-生成量有明显的抑制作用。

关键词: 臭氧氧化, 四溴双酚A, 溴离子, 溴酸盐

Abstract: The generation of bromide (Br-) and bromated (BrO3-) in tetrabromobisphenol A (TBBPA) ozonation process was investigated at different water quality parameters and ozone dose. The purpose of the experiment was to find out the main factors that control the formation of BrO3- during the ozonation of TBBPA. The results showed that there were two stages in the ozonation of TBBPA. In the first stage,the TBBPA was oxidized and Br- was released. The second stage was the ozonation of Br- to BrO3-. More Br- and BrO3- were generated at higher initial concentrations of TBBPA. The formation rate was improved with the increasing of ozone dose. The concentration of BrO3- increased 4.5 times with the temperature increased from 25 ℃ to 55 ℃. The levels of Br- and BrO3- decreased as the pH decreased from 11 to 8.

Key words: ozonation, TBBPA, bromide, bromate