季铵盐型高分子絮凝剂的制备及其在印染废水处理中的应用

 为增强絮凝剂的处理效果,用丙烯酰胺(AM)和聚2-羟基丙基二乙基氯化铵的水溶液聚合,制备一种阳离子型聚季铵盐丙烯酰胺接枝共聚物絮凝剂(PAQD),并将其用于印染废水的处理。结果表明:在常温、pH值为7.0、PAQD用量为7 mg/L的条件下,废水中色度、SS、CODCr的去除率分别为92.1%、89.3%和77.3%;与常规絮凝剂阴离子聚丙烯酰胺(APAM)、非离子聚丙烯酰胺(NPAM)相比,PAQD絮凝剂具有投量少,絮凝沉降速度快,滤饼含水率低,上清液透光性好等特点;PAQD的絮凝效果略优于进口阳离子聚丙烯酰胺(CPAM)。

Preparation of a quaternary ammonium flocculant and its application in treatment of dye house wastewater

For enhancing the treating effect of flocculants,polyquaternary ammonium acrylamide graft copolymer(PAQD) was prepared from acrylamide(AM) and poly2-hydroxylpropyldiethyl ammonium chloride and was used as flocculant in the treatment of dye house wastewater.The results showed that the removal rate of colourity,SS and CODcr was 92.1%,89.3% and 77.3% respectively under the conditions when temperature was normal,pH value was 7.0 and flocculant dosage was(7 mg/L).In comparison with conventional flocculants,such as anionic polyacrylamide(APAM) and nonionic polyacrylamide(NPAM),the flocculation performance of PAQD was the best.PAQD flocculant was characterized by less flocculant dosage,higher sedimentation rate,lower water content of filter cake and clearer supernatant.The flocculation effect of PAQD had a slight advantage over that of inward cationic polyacrylamide(CPAM).