在低浊度、低碱度、含高浓度水生腐殖物质的水中，研究了混凝去除三卤甲烷前体的方法。使用明矾、高分子量聚合物、阳离子聚合物以及这些混凝剂的各种组合，对合成水和天然水进行了Jar试验。研究发现，在腐殖物质的凝聚方面，单独使用阳离子聚合物的效果不如明矾。高分子量聚合物作为助凝剂与明矾一起使用可改善浊度去除，但不改善前体去除，而作为助凝剂与明矾一起使用的高电荷密度阳离子聚合物在低明矾剂量下提供良好的前体去除。包括26个参考文献、表格和图表。

The removal of trihalomethane precursors by coagulation was studied with low turbidity, low alkalinity waters containing high levels of aquatic humic matter. Jar tests were conducted with synthetic and natural waters using alum, high-molecular-weight polymers, cationic polymers, and various combinations of these coagulants. Cationic polymers alone were found to be less effective than alum in the coagulation of humic substances. High-molecular-weight polymers used as coagulant aids with alum improved turbidity removal but not precursor removal, whereas high-charge-density cationic polymers with alum as a coagulant aid provided good precursor removals at low alum dosages. Includes 26 references, tables, figures.