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Vol. 30 No. 7 (2018): Vol 30 Issue 7

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Photocatalytic Degradation of Methylene Blue Dye Using Chitosan Silica Composite

https://doi.org/10.14233/ajchem.2018.21273
P. Saraswathi
Department of Chemistry, JCT College of Engineering and Technology, Pichanur, Coimbatore-641 105, India
M. Makeswari
Department of Chemistry, Karpagam Academy of Higher Education, Coimbatore-641021, India

Corresponding Author(s) : M. Makeswari

makeshvu3@gmail.com

Asian Journal of Chemistry, Vol. 30 No. 7 (2018): Vol 30 Issue 7

Abstract

The ability of chitosan silica composite for the degradation of methylene blue dye from aqueous solution is studied by direct sunlight irradiation. Batch mode adsorption experiments are carried out to know the degradation capacity of the composite. Maximum removal efficiency 89.05 % of methylene blue is achieved at pH 10 with composite dosage of 0.1 g. Langmuir and Freundlich adsorption isotherm models are used to fit the obtained adsorption data. The maximum adsorption capacity is found to be 11.467 mg/g for the adsorption of methylene blue. The kinetic data is well fitted with pseudo first order kinetics. Degradation ability of methylene blue is confirmed by UV spectra studies.

Keywords

Degradation Chitosan silica composite Adsorption isotherms Methylene blue
Saraswathi, P., & Makeswari, M. (2018). Photocatalytic Degradation of Methylene Blue Dye Using Chitosan Silica Composite. Asian Journal of Chemistry, 30(7), 1603–1607. https://doi.org/10.14233/ajchem.2018.21273
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