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


Vol. 42,  No. 6, pp. 672-678, Dec.  1998


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  Abstract

산업폐기물인 꽃게의 껍질로부터 chitin을 탈아세틸화시켜 분자량이 서로 다른 chitosan을 제조하였다. Rhodamine 6G(Rh 6G)-sodium dodecyl sulfate(SDS)계 및 Rh 6G-chitosan계들의 흡수 및 형과 spectra를 조사하였고, chitosan의 분자량 및 pH에 따른 Rh 6G-SDS-chitosan계의 응집효과에 대해 조사하였다. Rh 6G-SDS계의 흡광도나 형광세기는 S/D(SDS 농도/Rh 6G 농도)=32 이하에서 감소하다가 그 이상에서 다시 증가하였다. 부유물질(SS) 제거율이나 투광도로부터 S/D=32에서 chitosan을 첨가한 Rh 6G-SDS-chitosan계의 응집 성능이 Rh 6G-SDS계에 비해 훨씬 우수함을 알 수 있었다. 그리고 chitosan의 농도나 분자량이 크면 클수록, S/D 첨가 범위는 32에서 100까지 확대되는 것을 알 수 있었다. 부유물질의 제거율은 chitosan의 분자량이 클수록 pH 2∼9에서 우수한 성능을 가지느 s반면, pH 12 이상에서 부유물질의 제거율은 현저히 저하되는 것을 알 수 있었다. Chitin was extracted from crab shell of Portuns triberculatus and deacethylated to yield chitosan with various molecular weights. 'ne 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.

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  Cite this article

[IEEE Style]

S. Kim, J. Nah, J. Oh, K. Song, "Effect of Molecular Weight of Chitosan on Flocculation of Suspended Solids in Rhodamine 6G-Sodium Dodecyl Sulfate System," Journal of the Korean Chemical Society, vol. 42, no. 6, pp. 672-678, 1998. DOI: .

[ACM Style]

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

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