Adsorption and desorption of methylene blue dye from waste water using multiple biosorbent technology


Abstract:
Dyes are intensely coloured complex organic compounds. The most significant industrial use of dye is in the textile dyeing process. Increased usage of dyes in the industrial scale is sequentially associated with the release of processed dye wastes in the water resources. These dye pollutants in waste water are the principle sources of aqueous contamination, since they are designed to be chemically and photolytically stable and are highly resistant in natural environment. The toxicological aspects of these dyes include, allergic reactions, prevention of oxygen binding and carcinogenic activity. Hence, the treatment of waste water to remove these contaminating dyes is inevitable and such treatment can be accomplished by physical, chemical and biological methods. Accordingly, our current research work focuses on removal of such basic dye called methylene blue from industrial waste water by physical adsorption methodology using biological materials as adsorbents (biosorbents). The first part of our study involves the analysis of different biosorbent materials derived from sawdust, banana fibres and coconut fibres on removal of methylene blue dye. The biosorbents were characterised for their dye adsorbing efficiency and analysed for various parameters, such as adsorbing temperature, dye concentration, etc. The second part of our study involves the usage of combination of biosorbents for an effective removal of methylene blue dye. The results of this two-part study indicated that, the mixed biosorbents have more adsorption capacity than the individual biosorbent material. In addition, the desorption of dye was also performed to make the re-use of biosorbents.

Keywords:
Effluents; Adsorption; Biosorbents; Methylene blue; Desorption

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How to cite this article:
Madhan R, Sundar R, Aswin Kumar B, Selvakumar K. Adsorption and desorption of methylene blue dye from waste water using multiple biosorbent technology. Journal of Biological and Information Sciences. 2012. 1 (3). 3-6.
Available from: http://archive.biolim.org/jbis/read/BOJ001A0013.