该项目的重点是调查各种参数对沉积物形成的影响 饮用水处理用有机聚合物氯胺化的NDMA。明确地 该项目旨在回答以下问题: 饮用水处理中使用的阴离子或非离子聚合物是否也会形成NDMA； 聚合物剂量对NDMA形成的影响是什么； 氯胺接触时间对NDMA形成有何影响； 氨添加上游的游离氯接触时间对 NDMA组下游； 水的pH值对聚合物形成NDMA有什么影响；和 聚合物储存条件是否影响其形成NDMA的可能性？而测试是在有机溶剂中进行的- 自由去离子实验室水，其 研究结果应为水机构提供如何管理氯胺聚合物的具体见解 相互作用，并尽量减少NDMA在其植物中的形成。 所有实验室规模的活动均由环境工程部的水质与处理解决方案（WQTS）进行 洛杉矶加利福尼亚大学实验室（UCLA）。分析了NDMA样品 南加州大都会水区水质实验室 （MWDSC）。所有DMA样本均由David Sedlak博士的研究小组在 加利福尼亚大学伯克利分校（UCB）。在项目开始时，WQTS进行了 赞助机构使用的聚合物调查。 根据调查结果， WQTS和就项目向WQTS提供建议的机构代表选择了12个 待评估的聚合物。其中八种是阳离子聚合物，两种是阳离子聚合物 阴离子聚合物和两种非离子聚合物。 实验室规模的试验集中于在不同条件下将聚合物溶液与氯胺接触 水质和实验条件，并分析NDMA和DMA的产品水。 最初计划进行七次测试，并进行了测试 进行了测试，但后来在项目中又增加了两项测试。在所有测试中，各种 聚合物溶液在Nanopure®水中制备。除测试3外，测试 化学添加顺序是氯，其次是氨，然后是聚合物。 氯胺化水首先在碳酸氢盐缓冲的Nanopure®水中制备。这个 以CaCO₃的形式，缓冲水的碱度保持在95至100 mg/L之间。这个 然后，氯胺化水被分成琥珀色玻璃瓶，目标聚合物被注入其中 添加了。所有化学溶液均在Nanopure®水中制备。包括11个参考文献、表格、图表。

This project focused on investigating the impact of various parameters on the formation of NDMA upon chloramination of organic polymers used in drinking water treatment. Specifically, the project was designed to answer the following questions: do anionic or nonionic polymers used in drinking water treatment also form NDMA; what is the impact of polymer dose on NDMA formation; what is the impact of chloramine contact time on NDMA formation; what is the impact of free chlorine contact time, upstream of ammonia addition, on downstream NDMA formation; what is the impact of water pH on NDMA formation from polymers; and, do the polymer storage conditions affect its potential to form NDMA? While the testing was conducted in organic-free deionized laboratory water, its results should provide specific insights to water agencies on how to manage the chloramine-polymer interaction and minimize NDMA formation at their plants. All bench-scale activities were conducted by Water Quality & Treatment Solutions (WQTS) at the Environmental Engineering Laboratory of the University of California, Los Angeles (UCLA). NDMA samples were analyzed by the Water Quality Laboratory of the Metropolitan Water District of Southern California (MWDSC). All DMA samples were analyzed by Dr. David Sedlak's research group at the University of California Berkeley (UCB). At the beginning of the project, WQTS conducted a survey of the polymers used by the sponsoring agencies. Based on the results of the survey, WQTS and the agency representatives advising WQTS on the project selected twelve polymers to be evaluated. Eight of these polymers were cationic polymers, two were anionic polymers, and two were nonionic polymers. The bench-scale tests focused on contacting polymer solutions with chloramine under various water quality and experimental conditions, and analyzing the product water for NDMA and DMA. Seven tests were initially planned and conducted, but two additional tests were added later on in the project. In all tests, various solutions of polymers were prepared in Nanopure® water. With the exception of Test 3, the chemical addition sequence was chlorine, followed by ammonia, and then followed by polymer. The chloraminated water was first prepared in bicarbonate-buffered Nanopure® water. The alkalinity of the buffered water was maintained between 95 and 100 mg/L as CaCO₃. The chloraminated water was then split into amber glass bottles to which the target polymer doses were added. All chemical solutions were prepared in Nanopure® water. Includes 11 references, tables, figures.