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Effect of Molecular Weight of Chitosan on Flocculation of Suspended Solids in Rhodamine 6G-Sodium Dodecyl Sulfate System
Effect of Molecular Weight of Chitosan on Flocculation of Suspended Solids in Rhodamine 6G-Sodium Dodecyl Sulfate System
Journal of the Korean Chemical Society. 1998. Dec, 42(6): 672-678
  • Published : December 00, 1998
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Kim, Sung Hyun
Nah, Jae Woon
Oh, Jeong Sun
Song, Ki Dong

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.??Ѥ?????????��????��?????����????��???????????����????????????????�??ִ???????????????Ѥ??