对含有天然有机物（NOM）的水源进行预分区可能会改变混凝剂的要求、通过混凝去除的总有机碳（TOC）以及成品饮用水中铝和铁的浓度。在这项工作中，对这些现象进行了调查，并将其解释为（1）在臭氧氧化的NOM存在下形成的沉淀物（絮体）的zeta电位的变化；（2） NOM分子氧化和挥发导致TOC轻微损失；（3）通过沉淀和吸附去除的TOC数量的变化。包括24个参考文献、表格和图表。

Preozonation of water sources containing natural organic matter (NOM) may alter coagulant requirements, the total organic carbon (TOC) removed by coagulation, and the concentration of aluminum and iron in the finished drinking water. In this work, these phenomena were investigated and interpreted as resulting from (1) changes in the zeta potential of precipitates (flocs) that form in the presence of ozonated NOM; (2) slight losses of TOC by oxidation and volatilization of NOM molecules; and (3) changes in the quantity of TOC removed by precipitation and sorption. Includes 24 references, tables, figures.