Study on Effect and Mechanism of Chitosan Coagulation Aid in Flocculation Treatment of Water Supply

Abstract:

The aim of this work is to remove residual turbidity and index of Potassium permanganate of the drinking water by PAC/Chitosan coagulation treatment. The experiments were performd the efficiency of coagulation by PAC/Chitosan at different chitosan dosages , molecular weight and pH value. Zeta potential instrument and Nikon electron microscope were used to test Zeta potential and observe flocs morphology. It turn out that Chitosan enhance the flocculation treatment of the surface water of raw water of Yellow River by polymeric aluminum chloride (PAC)when PAC dosage is 35 mg•l-1 and Chitosan is 0.15 mg•l-1 and infer coagulation aid mechanism was interpartical bridging rather than the electrical neutralization. Microscope and image analysis system of flocs morphology show that fractal dimension of morphology of PAC and PAC/Chitosan were 1.294,1.385, respectively.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 1857-1863
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.1857
• Online since: January 2012
• Authors: Bing Tao Liu, Wei Wu, Hai Yang Cong
• Keywords: Chitosan, Coagulation Aid, Polymeric Aluminum Chloride, Water Supply

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