The effect of different particle sizes of bentonite from the Bogovina deposit on the Briggs-Rauscher oscillatory reaction

Abstract

The Briggs-Rauscher oscillatory reaction, which represents the oxidation of malonic acid in the presence of hydrogen peroxide and potassium iodate catalyzed by manganese ion in an acidic environment, proved to be extremely sensitive for testing insoluble materials, such as bronzes and clays. It was shown that origin of bentonite has high impact on the length of the oscillation time. In this work, the influence of different sizes of bentonite particles from the Bogovina deposit on the Briggs-Rauscer oscillatory reaction in the conditions of a closed reactor was investigated. Five particle sizes of bentonite, (< 25 µm, < 50 µm, < 75 µm, < 150 µm and < 300 µm) having identical mass of 0.15 g, were tested. The addition of different particle sizes of Bogovina clay does not significantly influence the basic BR oscillogram.