通过一系列使用不同有机物、pH值和混凝剂的罐式试验，在实验室规模上研究了预分区对混凝剂、颗粒物和天然有机物之间相互作用的影响。当明矾用作混凝剂时，在试验条件下，预分区会阻碍浊度和溶解有机物（DOM）的去除。然而，当使用阳离子聚合物作为凝聚剂时，预分区会导致浊度和DOM的去除率略有增加，但在统计学上显著增加。当聚合氯化铝用作几种天然水体的混凝剂时，在一种情况下，预分区有助于浑浊和DOM的去除，而在另一种情况下则阻碍颗粒物和有机物的去除。作者假设，预分区减少了颗粒物的表面电荷，从而通过电荷中和产生更好的凝聚。 包括12个参考文献、表格和图表。

The effects of preozonation on interactions among coagulants, particles, andnatural organic matter were examined at bench scale through a series of jar testsusing different organic matter, pH values, and coagulants. When alum was used asa coagulant, preozonation hindered turbidity and dissolved organic matter (DOM)removal at the conditions tested. When cationic polymers were used as thecoagulant, however, preozonation led to small but statistically significantincreases in the removal of both turbidity and DOM. When polyaluminum chloridewas used as the coagulant for several natural waters, preozonation aidedturbidity and DOM removal in one instance and hindered removal of particles andorganic materials in another instance. The authors hypothesize that preozonationreduces the surface charge of particulates, leading to better coagulation bycharge neutralization. Includes 12 references, tables, figures.