In the presence of alkaline catalyst NaOH

natural polymer polysaccharide based cationic starch (CS)

the adsorbent for reactive dye

was synthesized by corn starch as raw material and 3-chloro-2-hydroxypropyltrimethyl ammonium chloride as cationic agent. The etherification reaction mechanism was studied and the influences of the reaction conditions on the degree of substitution (DS) and reaction efficiency (RE) were investigated. Structure of the product confirmed by scanning electron microscopy (SEM)

Raman spectra (RAM) and X-ray powder diffraction (XRD) indicated that the cationic groups were successfully introduced into corn starch. The results showed that when the DS is 0.12 and the solution pH is 8

the adsorption amounts of the product on reactive red dye 195 and reactive golden yellow dye K-2RA were 21.0 mg·g-1 and 20.4 mg·g-1

respectively

and the removal rates were 84.1% and 81.6%

respectively

which were better than those of inorganic adsorption material active carbon. The regeneration property of the CS dye adsorbing material was also investigated. It was found that the CS dye adsorbing material with favorable regeneration performance could use circularly and was expected to be an ideal substitute for inorganic adsorbent and synthetic resin adsorbent applying in the treatment of industrial dye wastewater.