改良絮凝剂在高浊度及含油废水处理中的应用  

Modified flocculants for high turbidity and oily wastewater treatment

作　　者：刘蕊 吴佳瑶 LIU Rui;WU Jia-yao(Guiyang Aluminum Magnesium Design&Research Institute Company Limited,Guiyang 550081,China;School of Water and Environment,Chang’an University,Xi’an 710054,China)

机构地区：[1]贵阳铝镁设计研究院有限公司,贵州贵阳550081 [2]长安大学水利与环境学院,陕西西安710054

出　　处：《应用化工》2023年第9期2566-2570,共5页Applied Chemical Industry

基　　金：中央高校基本科研业务费资助项目(300102293204)。

摘　　要：依托Mannich反应在聚丙烯酰胺(PAM)上接枝二乙胺,合成叔胺型有机高分子阳离子絮凝剂(D-PAM),并用于高浊度水处理。通过比较不同的原料投料比、pH值、反应时间和反应温度,确定了制备D-PAM絮凝剂的最佳条件以及处理高浊度废水的最佳絮凝条件。结果表明,在摩尔比为PAM∶甲醛∶二乙胺=1∶0.7∶0.85、pH=9~11、反应温度45~50℃、甲醛反应时间t_(1)=1 h,二乙胺反应时间t_(2)=2 h,此时接枝效果最好。同时,该絮凝剂对高浊度废水有良好的处理效果,最佳絮凝条件为:在强酸或强碱条件下使用0.7 mL 1%D-PAM溶液、在300 r/min下快速搅拌4 min、然后180 r/min,搅拌7 min,静置沉降20 min,最高去浊率为99.81%。合成的絮凝剂在高浊度废水及含油废水的处理中具有一定优势,是一种可双功能处理废水的新型阳离子絮凝剂。Tertiary amine organic macromolecule cationic flocculant(D-PAM)was synthesized by grafting diethylamine onto polyacrylamide(PAM)based on Mannich reaction and used for high turbidity water treatment.The optimal conditions for preparing D-PAM flocculant and treating high turbidity wastewater were determined by comparing different raw material feed ratios,pH values,reaction time,and reaction temperatures.The results showed that when the molar ratio of PAM∶formaldehyde∶diethylamine=1∶0.7∶0.85,pH=9~11,reaction temperature 45~50℃,formaldehyde reaction time t_(1)=1 h,diethylamine reaction time t_(2)=2 h,the grafting effect was the best.At the same time,the flocculant has good treatment effect on high turbidity wastewater.The optimal flocculation condition is to use 0.7 mL of 1%D-PAM solution under strong acid or alkali conditions,quickly stir at 300 r/min for 4 min,then stir at 180 r/min for 7 min,settle for 20 min,and achieve a maximum turbidity removal rate of 99.81%.The synthesized flocculant can be used for the treatment of high turbidity wastewater and oily wastewater simultaneously,obtaining a new type of cationic flocculant that can treat wastewater with dual functions.

关 键 词：二乙胺接枝 胺化絮凝剂 阳离子聚丙烯酰胺 高浊度水 含油废水 

分 类 号：TQ424.1[化学工程] TQ316[环境科学与工程—环境工程] X52