Title of article :
Removal of Methyl Orange From Aqueous Solution By Iraqi Bentonite Adsorbent
Author/Authors :
Al-heetimi, Dhafir T. Ajeel University of Baghdad - College of Education Ibn -Alhaitham - Department of Chemistry, Iraq , Dawood, A. H. University of Karbala - College of Science - Department of Chemistry, Iraq , Khalaf, Q. Z. University of Tikrit - College of Dentistry - Department of Chemistry, Iraq , Himdan, T. A. University of Baghdad - College of Education Ibn -Alhaitham - Department of Chemistry, Iraq
Abstract :
The adsorption behavior of methyl orange from aqueous solution on Iraqi bentonite was investigated. The effects of various parameters such as initial concentration of methyl orange, amount of adsorbent, ionic strength and temperature on the adsorption capacity has been studied. The percentage removal of methyl orange increased with the decrease of initial concentration of methyl orange and it increased with the increase of dose of adsorbent. The adsorbed amount of methyl orange decrease with increasing ionic strength and an increase in temperature. The equilibrium adsorption isotherms have been analysed by the linear, Langmuir and Temkin models. The Langmuir isotherms have the highest correlation coefficients. Thermodynamic parameters such as ΔG, ΔH and ΔS for the adsorption process were calculated. The adsorption process was found to be exothermic and spontaneous.
Keywords :
adsorption , methyl orange , Langmuir and Temkin isotherms , ionic strength , thermodynamic parameters
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
Journal title :
Ibn Alhaitham Journal For Pure and Applied Science
