Oxidative decolorization of indigo caramine dye with chloramine-T catalyzed by cobalt(II)

Venkatesha, B. M. and Radhika, R. T. and Ananda, S. and Byrappa, K. (2011) Oxidative decolorization of indigo caramine dye with chloramine-T catalyzed by cobalt(II). RESEARCH ON CHEMICAL INTERMEDIATES, 37 (2-5). pp. 195-199. ISSN 0922-6168

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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.

Item Type:	Article
Additional Information:	2nd International Solvothermal and Hydrothermal-Association Conference (ISHA 2010), Beijing, PEOPLES R CHINA, JUL 27-29, 2010
Uncontrolled Keywords:	Decolorization; Indigo caramine dye; Chloramine-T; Co(II); Catalysis
Subjects:	C Chemical Science > Chemistry
Divisions:	Department of > Chemistry
Depositing User:	Users 23 not found.
Date Deposited:	04 Jul 2019 07:53
Last Modified:	04 Jul 2019 07:53
URI:	http://eprints.uni-mysore.ac.in/id/eprint/2525

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