论文部分内容阅读
含溴水源水在应用臭氧氧化过程中,存在致癌物溴酸盐生成或超标(10μg/L)的风险,过氧化氢投加能有效控制溴酸盐,然而在以往的研究中,不同的水源水应用过氧化氢控制溴酸盐的效果存在很大差异。以我国东部某水源水作为研究对象,考察水源水质因素中腐殖酸类有机物对溴酸盐生成与控制的影响。研究发现该水源臭氧氧化过程中溴酸盐生成量达到17.52μg/L,水中腐殖酸浓度(以DOC计)的增加使得体系内溴酸盐的生成量有所降低,当DOC增加2.0mg/L时,溴酸盐生成量降低到10.11μg/L。过氧化氢控制溴酸盐过程中,随着H_2O_2/O_3(g/g)的增加,溴酸盐生成量逐渐降低,当H_2O_2/O_3(g/g)为1.0时,溴酸盐被控制在标准以内,为6.32μg/L。当原水中腐殖酸含量增加时,溴酸盐生成量随H_2O_2/O_3(g/g)的增加而逐渐降低,且导致所需投加过氧化氢量减少,当DOC增加1.0 mg/L时,H_2O_2/O_3(g/g)为0.1,即能将溴酸盐控制在9.52μg/L,DOC增加2.0mg/L时,H_2O_2/O_3(g/g)为0.1,溴酸盐控制在7.92μg/L。
Brominated water sources In the application of ozone oxidation, there is a risk of carcinogen bromate formation or excess (10 μg / L). Hydrogen peroxide additions can effectively control bromate. However, in previous studies, different sources of water There is a big difference in the effect of using hydrogen peroxide to control bromate. Taking a water source water in the eastern part of our country as the research object, the effects of humic acid organic compounds on the generation and control of bromate were investigated. The results showed that the bromate generation reached 17.52μg / L in the ozone oxidation process. The increase of humic acid concentration in water (DOC) decreased the bromate production in the system. When DOC increased by 2.0mg / L, the amount of bromate reduced to 10.11μg / L. In the process of bromate control by hydrogen peroxide, the bromate production gradually decreases with the increase of H 2 O 3 / g (g / g). When the concentration of H 2 O 2 / g 3 is 1.0, bromate is controlled at Within the standard, 6.32μg / L. When the content of humic acid in raw water increased, the amount of bromate decreased with the increase of H 2 O 2 / O 3 (g / g), and resulted in the decrease of the amount of hydrogen peroxide needed. When DOC increased 1.0 mg / L , H_2O_2 / O_3 (g / g) was 0.1, that is, the bromate can be controlled at 9.52μg / L, DOC 2.0mg / L, H_2O_2 / O_3 μg / L.