Abstract

THERMODYNAMIC STUDY OF THE ADSORPTION OF INDYSTRIAL DYES BY WESTERN DESERT BENTONITE CLAY

Abdullah Kh. Al-Niemi* and Safwan AS. Al-dbouni

ABSTRACT

This research involved studying the adsorption of two dyes (Brilliant green and Brilliant Yellow) using Western Desert bentonite clay for the purpose of removing them from their aqueous solutions. The optimal conditions for the process of adsorption of these two dyes such as the effect of the amount of adsorbent, initial concentration and temperature were identified. The results of the study showed that the forces controlling the adsorption process were of a physical nature, and that the adsorption process occurs by attaching the dye to the surface of the adsorption spontaneously to form a less random system. Several models of isothermic equations such as (Lankmeyer, Frindlach) were applied on the practical results of adsorption, this study showed their application agreement with mentioned isotherms, by obtaining a linear relationship and a high correlation coefficient (R) except the) Brilliant Yellow) dye its practical resells did not agreement to the Lankmeyer isotherm because its correlation coefficient (R) values are low.

Keywords: Thermodermic, adsorption, bentonite clay, dyes, isotherm.