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以我国南方某市饮用水源为研究对象,分析了不同反应条件下的三氯乙醛(CH)生成情况、CH与常规消毒副产物(DBPs)的相关关系及水质指标与CH生成势(CHFP)的相关关系。结果表明,5~35℃温度范围内,CH生成量随着温度的升高而逐渐升高,45℃时,反应约30 h后CH降解速率大于生成速率,生成量逐渐减少;CH生成量随着p H的升高而逐渐降低,当p H=11时,CH已经完全降解;Cl_2∶TOC=1∶1~4∶1(质量比)时,CH的生成量随着加氯量的增加而增加,但是当Cl_2∶TOC>4∶1时,CH的生成量基本保持不变。CH与两类常规DBPs(三卤甲烷(THMs)和卤乙酸(HAAs))之间均为正相关关系,且CH与卤乙酸(HAAs)的相关关系更为显著。与UV_(254)和SUVA_(254)相比,CHFP与TOC线性关系更为显著,可以根据原水的TOC来简单预测水体中的CHFP。
Taking the source of drinking water in a city in southern China as the research object, the formation of CHC under different reaction conditions, the correlation between CH and DBPs and the relationship between water quality index and CH production potential (CHFP ) Of the relationship. The results showed that the CH production increased gradually with the increase of temperature at 5 ~ 35 ℃. After 45 ℃ reaction for 30 h, the CH degradation rate was higher than that of the formation rate, and the production of CH decreased gradually. While p H = 11, CH has been completely degraded. When Cl_2: TOC = 1: 1 ~ 4:1 (mass ratio), the formation of CH increases with the increase of chlorination However, when Cl_2: TOC> 4:1, the formation of CH remained almost unchanged. There was a positive correlation between CH and two kinds of conventional DBPs (THMs and HAAs), and the correlation between CH and HAAs was more significant. The linear relationship between CHFP and TOC is more significant than that of UV 254 and SUVA 254, and CHFP in water can be easily predicted based on the TOC of raw water.