摘要：

制备了聚合硫酸铁-阳离子改性淀粉（PFS-CS）复合混凝剂，并以普拉红B模拟染色废水为研究对象，考察了m（PFS）：m（CS）、熟化时间及混凝pH对复合混凝剂混凝性能的影响。结果表明，最佳制备条件：熟化时间4 h，m（PFS）：m（CS）=50：1。在最佳制备条件下，当PFS-CS投加量为5 mL，混凝时间为20 min，pH为10时，色度与COD去除率分别为96.84%、75.85%。与聚丙烯酰胺相比，在相同的混凝条件下，PFS-CS复合混凝剂的处理效果更好。

关键词: 染色废水, 阳离子淀粉, 复合混凝剂, 混凝

Abstract:

Polyferric sulfate-cationic modified starch(PFS-CS) composite coagulant was prepared, and used to treat Oprah Red B simulated dyeing wastewater. Then the effects of m(PFS):m(CS), curing time, and coagulation pH on coagulation performance of the composite coagulant were investigated. The results showed the optimal preparation conditions were as follows:curing time 4 h, m(PFS):m(CS) was 50:1. Under the optimum preparation condition, when the PFS-CS dosage was 5 mL, the coagulation time was 20 min and the pH was 10, the chroma and COD removal rates were 96.84% and 75.85%, respectively. Compared with polyacrylamide, PFS-CS composite coagulant had better treatment effect under the same coagulation condition.

Key words: dyeing wastewater, cationic starch, composite coagulant, coagulation

中图分类号: 

• X703