复合混凝剂PAC/PDM存储稳定性研究

The research on storage stability of composite coagulants PAC/PDM

摘要:

该文研究了由聚合氯化铝（PAC）和聚二甲基二烯丙基氯化铵（PDM）制成的复合混凝剂PAC/PDM的存储稳定性。采用Al-Ferron逐时络合比色法考察了经常温存储和水浴高温80℃存储前后复合混凝剂铝形态分布的变化，并用混凝烧杯实验考察了存储前后复合混凝剂的混凝脱浊性能和对CODMn去除率的变化。结果表明，经常温存储180d和高温80℃水浴存储10d后，未观察到Ala、Alb、Alc含量有明显变化；针对所用模拟水，不同温度下存储不同时间后复合混凝剂的混凝脱浊曲线几乎重合，CODMn去除率也基本不变。由此推得复合混凝剂PAC/PDM具有良好的存储稳定性能。

Abstract:

To research the storage stability of composite coagulants PAC/PDM prepared using Polyaluminum Chloride (PAC) and Polydimethyldiallylammonium Chloride (PDM), Al-Ferron complexation timed spectrophotometry was used to test the changes of the species distribution of Aluminum in the composite coagulations before and after stored at room temperature or at 80℃ in water bath, and the jar test was also used to evaluate their variation of coagulation performance. The results showed that none obvious change of the species distribution of Aluminum in the composite coagulants, caused by stored in different time at room temperature or at 80℃,could been observed. The jar test results indicated that the obvious changes of removal efficiency in turbidity and CODMn of composite coagulants resulted from storage were still not measured. Therefore, composite coagulants PAC/PDM had behaved a good storage stability.