含溴水臭氧化过程中各溴类物质的生成和分布

Formation and distribution of bromine species during ozonation in filtered surface water containing bromide

为寻求控制各溴类副产物生成的有效途径,研究了含溴水在臭氧氧化过程中,Br-质量浓度和臭氧投量综合作用对溴酸盐(BrO3-)和溴代三卤甲烷生成势(THMFP-Br)生成量的影响,以及臭氧投量和臭氧接触时间对THMFP-Br、BrO3-、总有机溴(TOBr)等溴类物质分布的影响.结果表明,不同Br-质量浓度下臭氧对THMFP-Br均有去除效果,低Br-质量浓度水中臭氧投量高时才有BrO3-生成.臭氧投量对TOBr中溴元素占初始Br-比例影响显著,而对THMFP-Br影响不大.臭氧化时间延长使BrO3-生成量增加,TOBr减少.

To investigate the effects of bromide concentration and ozone dosage on the formation of brominated trihalomethane formation potential （THMFP- Br） and BrO3^-in ozonation, the effects of ozone dosage and reaction time on the distribution of bromide species were studied. The results show that THMFP - Br can be removed by ozone in water with different bromide concentrations. In low bromide concentration, BrO3^ - is formed only in high ozone dosage. Ozone dosage has great influence on the amount of total organic bromine （TOBr） on the percent conversion of Br^- , but has no obvious effect on THMFP - Br. The generated BrO3^ - increases and the amount of TOBr decreases with the extended reaction time of ozonation.