Effect of Molecular Weight of Chitosan on Flocculation of Suspended Solids in Rhodamine 6G-Sodium Dodecyl Sulfate System

키토산 분자량에 따른 Rhodamine 6G-Sodium Dodecyl Sulfate계의 응집효과에 관한 연구

  • 김성현 (Regional Office of Kwangju-Chonnam Small and Medium Business) ;
  • 나재운 (Dept. of Polymer Science and Engineering, Sunchon National University) ;
  • 오정선 (Dept. of Chemistry, Chosun Univ.) ;
  • 송기동 (Dept. of Chemistry, Chosun Univ.)
  • Published : 19981200

Abstract

Chitin was extracted from crab shell of Portuns triberculatus and deacethylated to yield chitosan with various molecular weights. The absorption and the fluorescence spectra of Rhodamine 6G(Rh 6G)-sodium dodecyl sulfate(SDS) and Rh 6G-chitosan systems were obtained. From the spectra, we observed that the absorption and the fluorescence intensity of Rh 6G-SDS system decreased when S/D(the concentration of SDS to that of Rh 6G ratio) was below or at 32, while they increased when S/D was above 32. From the suspended solid(SS) removal rate and the transmittance of Rh 6G-SDS-chitosan system, we found that when S/D ratio was 32 its flocculating behaviour was much stronger than Rh 6G-SDS system. As the concentration and the molecular weight of chitosan increased, we also found that S/D range was extended from 32 to 100. With increasing the molecular weight of chitosan, the SS removal rate increased around pH 2~9 but decreased remarkably at pH>12.

Keywords

References

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