KINETICS OF THE OXIDATIVE DECOLORIZATION OF AMARANTH RED BY ACIDIC BROMATE
abougamra, zeinab; H. A. A. Medien;
Abstract
The kinetics of the oxidative decolorization of amaranth with KBrO3 acidified by H2SO4 was followed up by monitoring the decrease of the
absorbance of amaranth at max = 520 nm. The reaction was carried out under pseudo-first-order conditions. The concentration of BrO3
- was
ca 300 greater than that of amaranth. The rate of reaction increased with increasing concentration of H2SO4 and BrO3
-, while amaranth had
no effect on the rate of reaction. The effects of the ions, Cl-, Br- and SO4
-- were investigated and the reaction rate increased with increasing
concentrations of chloride and bromide while it decreased with increasing concentration of SO4
--. A reaction mechanism has been proposed.
absorbance of amaranth at max = 520 nm. The reaction was carried out under pseudo-first-order conditions. The concentration of BrO3
- was
ca 300 greater than that of amaranth. The rate of reaction increased with increasing concentration of H2SO4 and BrO3
-, while amaranth had
no effect on the rate of reaction. The effects of the ions, Cl-, Br- and SO4
-- were investigated and the reaction rate increased with increasing
concentrations of chloride and bromide while it decreased with increasing concentration of SO4
--. A reaction mechanism has been proposed.
Other data
| Title | KINETICS OF THE OXIDATIVE DECOLORIZATION OF AMARANTH RED BY ACIDIC BROMATE | Other Titles | - | Authors | abougamra, zeinab ; H. A. A. Medien | Issue Date | 13-Jun-2014 | Journal | Eur. Chem. Bull. | DOI | 10.17628/ecb.2014.3.729-733 |
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