在一项实验室研究中，使用作为公共供水来源的天然水样本，明矾和三氯化铁的混凝被证明是去除三卤甲烷前体的可行方法。明矾比三氯化铁更有效地降低各种水体的总有机物和三卤甲烷生成电位（THMFP），但工艺变量和原水特性影响金属混凝的效果。结合明矾和三氯化铁对各种助凝剂进行了评估。在大多数情况下，混凝剂-助凝剂组合提高了THMFP的去除率。包括18个参考文献、表格、图表。

In a laboratory study using samples of natural waters that are sources for public water supplies, coagulation with alum and ferric chloride was shown to be viable for removing trihalomethane precursors. Alum was more effective than ferric chloride in reducing total organic and trihalomethane formation potential (THMFP) of the various waters, but process variables and raw water characteristics influenced the effectiveness of metal coagulation. Various coagulant aids were evaluated in conjunction with alum and ferric chloride. In most cases, the coagulant-coagulant aid combination increased THMFP removal. Includes 18 references, tables, figures.