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Please use this identifier to cite or link to this item: http://hdl.handle.net/1812/561

Title: Use of Chlorella vulgaris immobilized in alginate for color removal from textile dyes
Authors: Isra Khider Ahmed Taha
Keywords: Chlorella vulgaris immobilized
Alginate
Color removal
Textile dyes
Lanaset Red 2GA
Issue Date: Dec-2007
Publisher: University Malaya
Abstract: Lanaset Red 2GA is one of the widely used dyes in textile industries which is very hazardous to human and the environment. Immobilized Chlorella vulgaris is an efficient biological method for removing color from textile dyes. The objective of this study was to improve the percentage of color removal from Lanaset Red 2GA by immobilized Chlorella vulgaris exposed to different parameters. Immobilized Chlorella vulgaris in 2% sodium alginate was used for all experiments in this study. It was found that immobilized cultures grew as good as suspension cultures in BBM with and without dye. Morphological study of immobilized Chlorella vulgaris grown in BBM and in dye for 15 days showed the increase in cell number and size, the division of immobilized cells seemed to be like budding, immobilized cells grown in dye appeared to be turned to red color. Increasing the initial cell density decreased the growth rate but increased in the final percentage of color removal. It was observed that the percentage of color removal increased with increasing the dye concentrations. Nitrogen and Phosphorus supplementation appeared to enhance the growth of suspension and immobilized cultures leading to the enhancement of color removal. It was found that buffering and non-buffering BBM medium doesn’t affect the growth of suspension and immobilized cultures. Immobilization of Chlorella vulgaris in different shapes showed different growth rates and different efficiencies in the removal of color; immobilized cultures in disk shapes showed highest growth rates and more efficient in color removal compared those immobilized in beads and cubes shape. In general, enhancing the growth of suspension and immobilized appeared to be increasing the ability of color removal. The highest percentage of color removal obtained from this study was 35.3% from 20mgL-1 of Lanaset Red 2GA by immobilized Chlorella vulgaris in disk shape grown in BBM with nitrogen concentration of 4.9M. A biosorption study showed that suspension and immobilized Chlorella vulgaris were efficient in the biosorption of Lanaset Red 2GA. The adsorption capacity increased with the increase in the initial dye concentration.
Description: Dissertation -- Faculty of Science, University of Malaya, 2007.
URI: http://dspace.fsktm.um.edu.my/handle/1812/561
Appears in Collections:Masters Dissertations : Science

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