Adsorption Behavior of Methylene Blue with Quaternary Ammonium Modified Chitosan Microspheres Resin
Chitosan (CTS) is the partly deacetylated product of Chitin. It contains hydrogen bond and ionic bond, which can form a cage-like molecular network structure and thus it has a strong adsorption. According to the presence of hydroxyl and amino groups of the chitosan, through chemical modification, introduces different groups in repeating units become possible. In this article, different component of the rectorite (REC) were used to intercalate the chitosan in order to have the quaternary ammonium modification. Through this process we could obtain three kinds of chitosan/rectorite modified products. Besides, their structures were observed by using the X-ray diffraction (XRD) and Fourier transform infrared (FT-IR). This paper also explained the examination of the adsorption effect of three kinds of chitosan/ rectorite modified products to the methylene blue under different conditions. Whats more, it also discussed the main factors of this effect. The results showed that the three adsorption behavior of adsorbents can be described by using the Freundlich isotherm model. In three kinds of chitosan/ rectorite modified products, 4:1 CTS/REC-ETA demonstrated the best adsorption. Followed was the 2:1 CTS/REC-ETA. And the 8:1 CTS/REC-ETA was the weakest.