使用颗粒活性炭微型柱进行的研究表明，pH值在从凝结的密西西比河中去除总有机碳和三卤甲烷前体中的重要性。当pH值降至5时，通过凝固减少有机物的效果显著提高。pH值对混凝和吸附的综合影响突出了pH值控制的必要性。包括15个参考文献、表格和图表。

Research conducted using miniature columns of granular activated carbon has demonstrated the importance of pH in the removal of total organic carbon and trihalomethane precursors from coagulated Mississippi River. The reduction of organics by coagulation improves dramatically as the pH is decreased to 5. The combined effects of pH on coagulation and adsorption highlight the need for pH control. Includes 15 references, tables, figures.