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以梧桐落叶有机物为实验对象,研究不同氯胺消毒条件下亚硝氮在卤代硝基甲烷(HNMs)形成中的作用,从而识别其关键影响因子。结果表明,亚硝氮的加入对梧桐落叶有机物氯胺化过程中HNMs的形成有明显的促进作用,而且在高氯胺含量、非中性(酸性或碱性)及低温条件下促进作用更为明显。由极差分析得知,影响亚硝氮进入HNMs分子的最大影响因子是p H,其次是氯胺含量,反应时间影响最小。HNMs的分布以三卤硝基甲烷(以TCNM为代表)为主,二卤硝基甲烷(以DCNM为代表)为辅,一卤硝基甲烷(以CNM为代表)则均没有检测到。其中三卤硝基甲烷的相对含量随着氯胺含量的增多、时间的延长、温度的上升而增加,但随着p H的上升而降低。
To study the effect of nitrite nitrogen on the formation of halonitromethane (HNMs) under different chloramine disinfection conditions, the key influencing factors were identified. The results showed that the addition of nitrite promoted the formation of HNMs in chloroplasts of sycamore deciduous organic matter, and promoted the formation of HNMs under the condition of high concentration of chloramines, non-neutral (acidic or basic) and low temperature obvious. From the range analysis, it is found that the most influential factor influencing the nitrite nitrogen entering HNMs molecules is p H, followed by the chloramine content, and the reaction time has the least impact. The distribution of HNMs is dominated by trihalomitromethane (represented by TCNM), while halonitromethane (represented by DCNM) is secondary, while monohalonitromethane (represented by CNM) is not detected. The relative content of trihalomethanesulfonamide increased with the increase of chloramine content, time and temperature, but decreased with the increase of p H.