Abstract:

Using zinc chloride，aluminum chloride，hydrochloric acid and polyacrylamide as main raw materials，the inorganic-organic zinc-base composite flocculant has been prepared. Turbidity removal rate is the investigation norm. The impact of the dosages of ZnCl₂、AlCl₃、PAM and HCl on the flocculating efficiency of zinc-base composite flocculant is discussed. The results show that the optimum preparation conditions of zinc-base composite flocculant are as follows：the mass fractions of ZnCl₂，AlCl₃，PAM and HCl are 10%，10%，0.015% and 3%，respectively. In comparison with aluminum-salt composite flocculant and iron-salt composite flocculant，the zinc-base composite flocculant is characterized by quick flocculating settling and small sludge volume.

Key words: composite flocculant, turbidity, zinc salt

摘要：

以氯化锌、氯化铝、盐酸和聚丙烯酰胺为主要原料，制备了无机-有机锌基复合絮凝剂。以浊度去除率为考察指标，探讨了制备过程中ZnCl₂、AlCl₃、PAM 和HCl的投加量对锌基复合絮凝剂絮凝效果的影响。结果表明，锌基复合絮凝剂的最佳制备条件：ZnCl₂质量分数为10%，AlCl₃质量分数为10%，PAM 质量分数为0.015%，HCl 质量分数为3%。与铝盐复合絮凝剂和铁盐复合絮凝剂相比，锌基复合絮凝剂具有絮凝沉降快、污泥体积小等特点。

关键词: 复合絮凝剂, 浊度, 锌盐

CLC Number: 

• TQ314.2