For the aim of getting macromolecular flocculant

we studied the copolymerization of acrylic acid onto Rhi．oryzae cell wall structural polysaccharide by the initiation of cefic ammonium nitrate．The effect of concentration of initiator and monomer

reaction temperature and reaction time on grafting percentage was investigated．To Rhi．oryzae cell wall structural polysaccharide the maximal grafring percentage of 135．5％ was achieved at [Ce+4]=5mmol／L

[AA]=lmol／L

T=60℃

t=3h．Then choosing organic dyes as the flocculated substances

by comparing with the chitosan

polyacrylamide and Rhi．oryzae cell wall structural polysaccharide hefore grafting

we studied the flocculent capability of Rhi．oryzae cell wall structural polysaccharide after grafting acrylic acid．The grafting product had excellent flocculent effect on basic and neutral dyes．