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Abstract The poly ( acrylamide-dimethyldiallylammonium chloride) ( PDA) -zinc polysilicate composite flocculant was prepared by aqueous solution polymerization method and the Congo red mock dye wastewater and kaolin simulated wastewater were treated by PDA and compound flocculant, respectively.Then scanning electron microscope was used to compare with PDA and compound flocculant respectively.The results showed that the composite flocculant had the best effect at pH = 8, and the decolorization rate was 90. 4% in dealing analog Congo red mock dye wastewater, which was 9. 1% higher than using PDA alone. The best optimum dosage was 1. 8 m L in the treatment of kaolin simulated wastewater. The removal of turbidity of the flocculant was 99. 5% at pH = 8, which was 16. 9% higher than using PDA alone.Finally, the complex flocculantby had more larger surface than the single bye the scanning electron microscopy, and this flocculant was more suitable for the flocculation of wastewater. Thus, in this experiment, the composite flocculant had a better performance than the PDA.
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Received: 02 April 2018
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2018, Vol. 31 
