密西西比河水的混凝改善了颗粒活性炭对总有机碳（TOC）和三卤甲烷前体的去除。这种去除率的增加被认为是由于TOC和通过混凝实现的低吸附高分子量有机物的减少。成本分析表明，在预处理过程中需要非常高的混凝剂剂量，以将化学处理的总体成本降至最低。包括14个参考文献、表格和图表。

Coagulation of Mississippi River water improved the removal of total organic carbon (TOC) and trihalomethane precursors by granular activated carbon. This increased removal is thought to be due to the reductions in TOC and in poorly adsorbed higher-molecular-weight organics that are achieved by coagulation. A cost analysis indicated that very high coagulant dosages would be needed during pretreatment to minimize the overall costs of chemical treatment. Includes 14 references, tables, figures.