本研究的重点是评估有机物（OM）的相变 使用金属盐混凝剂处理含有明显溶解有机物（DOM）的源水时的行为 浓度。这里使用的OM相位转换协议由三个OM大小组成 类别——溶解的、胶体的和颗粒的——在操作上由过滤技术定义。 颗粒有机物， DOM与铝或铁混凝剂相互作用形成，定义为 OM由1µm玻璃纤维（GF）过滤器保留。通过1µm GF过滤器的OM分数 但被30千道尔顿（kDa）的超滤膜（UF）保留的物质被称为胶体 有机物，而凝固后通过30 kDa超滤膜的任何有机物 被认为是溶解的有机物。在饮用水凝固过程中形成胶体可能是实现 在较低的混凝剂剂量下，可接受的OM和浊度去除，前提是胶体 形成的物质可通过后续过滤过程进行固液分离。这个 本研究的主要目的是评估凝固剂的类型和剂量以及水的浓度 化学参数，包括pH值、浊度、温度和DOM浓度，会影响 用明矾和硫酸铁混凝源水时胶体物质的形成。 此外，还对这些混凝剂的相对性能进行了评估，并对其相结构进行了分析 在选定的混凝条件下比较DOM和混凝剂金属的转化。包括27个参考文献、表格和图表。

This research study focused on evaluating the organic matter (OM) phase-transformation behavior when using metal-salt coagulants to treat source waters containing appreciable dissolved organic matter (DOM) concentrations. The OM phase-transformation protocol used here consists of three OM size categories - dissolved, colloidal, and particulate - operationally defined by filtration techniques. Particulate organic matter, formed by interaction of DOM with aluminum or iron coagulants, was defined as the fraction of OM retained by a 1 µm glass-fiber (GF) filter. The fraction of OM that passed a 1 µm GF filter but was retained by a 30 kiloDalton (kDa) ultrafiltration (UF) membrane was termed colloidal organic matter, whereas any organics that passed a 30 kDa UF membrane following coagulation were considered dissolved organic matter. Colloid formation during coagulation of drinking water may provide a means to achieve acceptable OM and turbidity removal at lower coagulant dosages, provided that the colloidal matter formed is amenable to solid-liquid separation by subsequent filtration processes. The primary objective of this research was to evaluate how coagulant type and dose, as well as water chemistry parameters including pH, turbidity, temperature, and DOM concentration, affect the formation of colloidal matter during coagulation of source waters with alum and ferric sulfate. Additionally, the relative performance of these coagulants was evaluated and the phase transformation of DOM and coagulant metal compared for selected coagulation conditions. Includes 27 references, table, figures.