Removal of Toxic Azo Dyes from Wastewater using Bottom Ash - Equilibrium Isothermal Modeling

This article describes the use of a power plant waste-Bottom Ash, as effective adsorbent for the removal of toxic Azo dyes Carmoisine and Chrysoidine Y from their aqueous solution. The paper incorporates comparative study and discussion of the adsorption characteristics of these dyes on the economically effective adsorbent with special emphasis on the effects of time and temperature. The characterizations of the adsorbent have been carried out by standard analytical techniques. The adsorption behavior of the dyes has been studied using some well-known Isotherms like Freundlich, Langmuir, Tempkin and Dubinin-Radushkevich adsorption isotherm models. The experimental results confirmed that both the dyes were potentially adsorbed by the power plant waste.