Title of article
Adsorption Study for Chromium (VI) on Iraqi Bentonite
Author/Authors
Al-Sa’adie, Khulood A. University of Baghdad - College of Science - Department of Chemistry, Iraq , Jassim, Sara Badrie University of Baghdad - College of Science - Department of Chemistry, Iraq
From page
1
To page
12
Abstract
The subject of this research involves studying adsorption to remove hexavalent chromium Cr(VI) from aqueous solutions. Adsorption process on bentonite clay as adsorbent was used in the Cr(VI) concentration range (10-100) ppm at different temperatures (298, 303, 308 and 313)K, for different periods of time. The adsorption isotherms were obtained by obeying Langmuir and Freundlich adsorption isotherm with R2 (0.9921-0.9060) and (0.994-0.9998), respectively. The thermodynamic parameters were calculated by using the adsorption process at four different temperatures the values of ΔH, ΔG and ΔS was [(+6.582 - +6.547) kJ.mol-1, (-284.560 - -343.070) kJ.mol-1 and (+0.977 - +1.117) kJ.K-1.mol-1] respectively. This data indicates the spontaneous sorption process. The kinetic study of adsorption process was studied depending on three kinetic equations: 1- Lagergren equation 2- Morris-Weber equation 3- Reichenberg equation
Keywords
Study , Adsorption , Chromium , Bentonite
Journal title
Baghdad Science Journal
Journal title
Baghdad Science Journal
Record number
2688624
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