Preparation and Flocculating Performance of Cationic Polyacrylamide

Cationic polyacrylamide was prepared,and effects of various factors such as oxidant-reductant concentration,azo-compound concentration,and cationic degree on the intrinsic viscosity of the product were studied.The influence of pH,the intrinsic viscosity,cationic degree,and the dosage of the cationic polyacry-lamide on the flocculating performance were also studied.When the(NH4)2S2O8 and CH3NaO3S·2H2O concentrations were 0.015 0%,the azo-compound concentration was 0.012 5%,the monomer concentration was 40%,and the cationic degree was 40%,the intrinsic viscosity of the product was 13.1 dL/g.The obtained optimum flocculating conditions were that the pH of the wastewater was 6.0,the intrinsic viscosity of the cationic polyacrylamide was 11.9 dL/g,the cationic degree was 40%,and the dosage was 0.027%.Under the above conditions,the transmittance of visible light for the wastewater after treatment was 98.0%,and the flocculating rate was 66.0%,and the dewatering rate was 70.0%.