ИЗУЧЕНИЕ АДСОРБЦИИ И КИНЕТИКИ АДСОРБЦИИ МЕТИЛЕНОВОГО СИНЕГО ИЗ ВОДНЫХ РАСТВОРОВ НА ТРЕПЕЛЕ

Елена ТУТОВАН, Татьяна ИСАК-ГУЦУЛ Молдавский государственный университет

Abstract

STUDY OF THE ADSORPTION AND OF THE ADSORPTION KINETICS OF METHYLENE BLUE FROM AQUATOUS SOLUTIONS ON TRIPOL

The adsorption of methylene blue dye (MB) on native natural tripol was studied. It has been established that MB adsorption on tripol increases with the growth of pH. The form of the MB adsorption isotherm on tripol is of the Langmuir type. There were determined the constants from the Langmuir isotherm (qmax = 107.527 mg/g, K = 0.046 L/mg) and Freundlich isotherm ( = 10.021 mg/g, 1/n = 0.517) and it was established that the adsorption process is more accurately described by Langmuir model. It was detected that the equilibrium is established practically after 8 hours of the MB solution contacting with the tripod. In general, the kinetics of the MB adsorption process on tripol is described by the pseudo-two order kinetic model (к2 = 2.13  10-2 gh-1mg-1). Keywords: methylene blue, tripol, adsorption, adsorption isotherm, adsorption kinetics.