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Development of novel polymeric flocculant based on grafted sodium alginate for the treatment of coal mine wastewater



Sodium alginate-g-polyacrylamide (SAG) was synthesized by ceric ion induced redox polymerization technique. Six grades of graft copolymers were prepared by varying as well as monomer concentrations. The graft copolymers were characterized by intrinsic viscosity measurements, IR, and 13C-NMR spectroscopies. Of the above grades, the graft copolymer of grade six (SAG-VI), which has longer polyacrylamide chains, was used for flocculation study. Two coking and noncoking coal fine suspensions were selected for the flocculation study. The flocculation performance of the graft copolymer was compared with commercial flocculants. In all cases, it was found that the graft copolymer showed better performance than the commercial flocculants. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 375–382, 2001

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