ABSTRACT ud udEka Rakhmawati, 2007. THE USAGE OF CHITOSAN PRODUCED BY udDEACETYLATION OF ACHATINA SHELL CHITIN AS REMAZOL YELLOW udDYE ADSORBENT. Thesis. Department of Chemistry. Mathematic and Science udFaculty. Sebelas Maret University. ud udChitosan has been made from achatina shell chitin by deacetylation udprocess. Isolation of chitin from achatina shell was done by deproteination and uddemineralization The chitosan was studied for its ability in adsorbing Remazol udYellow dye. Characterizations of the chitosan are involving determination of water udand mineral content, molecular weight, polymerization degree, and degree of uddeacetylation which is measured by Infrared spectroscopic method. Remazol udYellow dye adsorption by chitosan was done by variation of pH and contact time udin order to determine optimum condition of adsorption. Variation of concentration udwas done to determine isotherm adsorption type that occurred during the udadsorption process. The types of the adsorption isotherm were analyzed by udLangmuir and Freundlich isotherm. Adsorption and desorption of Remazol Yellow uddye in waste water by the chitosan were measured in the optimum condition. udThe yield of deacetylation process of achatina shell chitin was chitosan udwith rendement of 9.59 ± 0.71 %. It was odorless, brownish white powder. The udchitosan was characterized with 2.06 ± 0.82 % of water content and 26.11 ± 0.45 ud% of mineral content. The molecular weight average of chitosan was 2 kilodaltons udwith degree of polimerisation and degree of deacetylation were 12 and 74.95 % udrespectively. The optimum condition of Remazol Yellow dye adsorption was pH of ud2 and contact time of 24 hours. The dominant adsorption isotherm for Remazol udYellow dye adsorption by chitosan was Langmuir isotherm. The chitosan capacity udof adsorption in Remazol Yellow dye waste water was 0.40 mg/g with 23.34 % of udaverage desorption percentage.
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