Abstract
Decolorization of indigo caramine dye by oxidation process using chloramine-T as oxidant and Co(II) as catalyst in acidic buffer media, pH 5.8 has been kinetically studied at 300 K. Decolorization of indigo caramine dye was followed spectrophotometrically. Decolorization and oxidation led to a decrease in Chemical Oxygen Demand of the dye. The Co(II)-catalyzed reaction shows first-order dependence of the rate on chloramine-T and indigo caramine concentrations. It also shows fractional order dependence on [Co(II)] and [H+]. Addition of halide ions or reduction product of chloramine-T toluenesulfonamide, and variation of ionic strength and dielectric constant of the medium do not have any significant effect on the reaction rate. Activation parameters are evaluated from the Arrhenius plot, and a mechanism is proposed for the reaction.
Similar content being viewed by others
References
E. Curr, Encyclopedia of microscopic stain (Loenard Hall, London, 1960), p. 235
E.H. Rodd, Chemistry of Corbon compounds, vol. IVB (Elsevier, Amsterdam, 1960), p. 136
P.V.S. Rao, K.V. Subbaiah, P.S.N. Murthy, React. Kinet. Catal. Lett. 10, 79 (1979)
K. Srinivas, M. Vijayashree, P.V.S. Rao, Indian J. Chem. 21A, 773 (1982)
S. P. Jonnalagadda, R. H. Smoyi, G. K. Muthakia, J. Chem. Soc. Perkin Trans. II, 1111 (1988)
Puttaswamy, D.S. Mahadevappa, K.S. Rangappa, Bull. Chem. Soc. Jpn. 62, 3343 (1989)
Puttaswamy, D.S. Mahadevappa, N.M. Madegowda, Int. J. Chem. Kinet. 23, 27 (1991)
S. Ananda, B.M. Venkatesha, D.S. Mahadevappa, Ind. J. Chem. 34B, 508 (1995)
S. Ananda, B.M. Venkatesha, D.S. Mahadevappa, N.M.M. Gowda, Int. J. Chem. Kinet. 27, 663 (1995)
S. Ananda, M.B. Jagadeesha, B.M. Venkatesha, N.M.M. Gowda, Int. J. Chem. Kinet. 29, 453 (1995)
E. Bishop, Y.J. Jennings, Talanta 1, 197 (1958)
T. Higuchi, K. Ikeda, A. Hussain, J. Chem. Soc. (B) 546 (1967)
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Venkatesha, B.M., Radhika, R.T., Ananda, S. et al. Oxidative decolorization of indigo caramine dye with chloramine-T catalyzed by cobalt(II). Res Chem Intermed 37, 195–199 (2011). https://doi.org/10.1007/s11164-011-0266-2
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s11164-011-0266-2