The Synthesis And The Dye Decolorization Of A New Type Chitosan Coagulant

Research of new pattern of coagulation is becoming the hotspot in the fiel d of environment due to the deepening of industry. Using the proper coagulatio n can bring both economic and environmental interests.In this paper, a new kind of highly efficient decolorizer was synthesized with chitosan to treat the dye wastewater. The decolorization rates of the 2 typ es of dye chosen under the tests were all over 90%. The results of experiment showed that under the conditions of the reaction temperature is 60℃, chitosan / dicyandiamine / catalyzer / formaldehyde / hydrochloric acid (mass ratio)= 1: 5: 1.25: 6: 6, the decolourization rate of decolouriser is best.In addition, a study on the decolouration of reactive red 195 by single chi tosan is presented. The study also discussed elementarily the reaction between chitosan and reactive red 195, and the effects of adsorption interferents. This study forms the basis for exploring the new type of decolouriser.