有机和无机氮化合物在天然水中很常见 腐殖物质、氨基酸、胺、氨、亚硝酸盐和 硝酸盐。腐殖物质通常是存在于土壤中的大分子量化合物 土壤氨基酸和胺是生物体的分解产物 它们在天然水中的浓度从十亿分之几到百万分之几不等 水平（C.Le Cloirec，1983年）。这项研究跟踪了 天然水通过饮用水处理过程的每个阶段，以 观察它们在不同处理过程中对DBP形成的贡献。 基于 根据这些观察结果，该研究还评估了各种方法（pH值调整和 混凝剂和阳离子聚合物）最大限度地减少其对DBP形成的影响。 腐殖物质是三卤甲烷（THM）和THAA最常见的前体 但初步研究表明，氨基酸的自由氯化 有助于DBP的形成。约2%或更少的碳 原始氨基酸化合物转化为THMs和THAAs。氯化过程中 在氨基酸中，醛类通常作为中间阶段形成。醛类会 与氯进一步反应生成腈、酸或其他DBP。这项研究发现 甚至用作助凝剂的聚合物也可能是DBP形成的前体。 苯丙氨酸、丙氨酸、乙醛和乙二醛是所选择的化合物 在去离子水中氯化和氯胺化2小时。丙氨酸和丙氨酸的行为 苯丙氨酸在相同的氧化条件下在DBP中似乎没有太大差异 形成过程。氯仿转化为溴化THMs或腈 这两种氨基酸的速度比醛类慢。腈的反应机理 在这项研究中，氯胺化的形成尚不清楚。进行DBP分析 在不同治疗阶段的台架试验规模和全运行规模上。 结果 表明THM的形成在2分钟内达到终点，但THAS需要 6个多小时。需要进一步研究以了解反应机理。 为了减少DBP的形成，进行了一系列试验。是的 确定水源水的初始pH值是一个非常重要的参数 控制DBP的形成。在正确的凝固时刻，保持较低的pH值 显著减少DBP的形成，高达50%左右。当时是酸性明矾 作为混凝剂进行试验，以降低DBP浓度。结果是肯定的。 试验表明，当聚合物不用于反应器时，DBP的形成减少 治疗过程。其他测试表明，聚合物的添加顺序 可能影响DBP的形成。在明矾之前加入聚合物几乎可以达到相同的效果 与完全消除聚合物的效果相同。 包括6个参考文献、表格、图表和附录。

Organic and inorganic nitrogen compounds are common in natural water, and compounds such as humic substances, amino acids, amines, ammonia, nitrites, and nitrates. Humic substances are generally large molecular weight compounds existing in soil. Amino acids and amines are the decomposition products of the living bodies, and their concentration in natural water ranges from parts per billion to parts per million levels (C. Le Cloirec, 1983). This study followed the organic nitrogen species from natural water through each stage of the drinking water treatment process, in order to observe their contributions to the DBP formation in different treatment processes. Based on these observations, the study also evaluated methods (pH adjustment, and use of coagulants and cationic polymers) of minimizing their effect on DBP formation. Humic substances are the most common precursor for trihalomethanes (THM) and THAA formation, but a preliminary study showed that the free chlorination of amino acids also contributed to the formation of DBPs. Approximately 2% or less of the carbon in original amino acid compounds transformed to THMs and THAAs. During chlorination of amino acids, aldehydes usually form as an intermediate stage. The aldehydes will further react with chlorine to form nitriles, acids, or other DBPs. This study found that even the polymer used as a coagulant aid can be a precursor of DBP formation. Phenylalanine, alanine, acetaldehyde and glyoxal were the compounds selected for chlorination and chloramination in 2 hours in a DI water. The behavior of alanine and phenylalanine in the same oxidation condition seems not much different in the DBP formation process. Chloroform transformation to the brominated THMs or nitriles from these two amino acids was slower than for aldehydes. The mechanism of nitrile formation from chloramination was unclear in this study. DBP analysis was performed on both bench test scale and full operation scale in different treatment stages. The results show that THM formation reached its endpoint within 2 minutes, but that THAAs need more than 6 hours. Further study is needed to understand the mechanism of the reaction. A series of tests was conducted for minimizing DBP formation. It was determined that the initial pH of the source water was a very important parameter for controlling the DBP formation. A lower pH condition at the right moment of coagulation significantly decreased the DBP formation, up to about 50 percent. Acid alum was then tested as a coagulant in order to reduce the DBP concentration. The result was positive. Tests showed that the DBP formation was reduced when polymer was not used in the treatment process. Additional tests showed that the order in which the polymer was added could effect the DBP formation. Adding the polymer prior to the alum had nearly the same effect as eliminating the polymer completely. Includes 6 references, tables, figures, appendix.