复合混凝剂PAC/PDM存储稳定性研究  

A Study on the Storage Stability of Composite Coagulants PAC/PDM

作　　者：徐晶晶[1] 张跃军[1] 李潇潇[1] 

机构地区：[1]南京理工大学化工学院,江苏南京210094

出　　处：《精细化工》2011年第9期899-903,932,共6页Fine Chemicals

基　　金：南京市科技计划项目(04d251016)~~

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180 d和高温80℃水浴存储10 d后,未观察到Ala、Alb、Alc(摩尔分数)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。由此可知,复合混凝剂PAC/PDM具有良好的存储稳定性。A study was carried out on the storage stability of composite coagulants PAC/PDM prepared from polyaluminum chloride （ PAC ） and polydimethyldiallylammonium chloride （ PDM ）. Al-Ferron complexation timed speetrophotometry was used to investigate the changes of the species distribution of aluminum in the composite coagulants 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 show that no obvious change of the species distribution of aluminum in the composite coagulants could been observed, either caused by being stored in different time at room temperature or at 80℃. The jar test results indicate that the obvious changes of removal efficiency in turbidity and CODMn of composite coagulants resulting from storage were still not measured. Therefore, composite coagulants PAC/PDM exhibit good storage stability.

关 键 词：PAC PDM 复合混凝剂 Al-Ferron逐时络合比色法 混凝 稳定性 水处理技术 

分 类 号：TQ423.9[化学工程]