عنوان المقالة:Removal of chromium trivalent ions from aqueous solutions using bypass cement kiln dust and its application to tannery wastewater treatment
H. G. Ibrahim, M. Al-Meshragi, H. A. Elakrami, A. Y. Okasha
Abstract
The studies on adsorption of trivalent chromium Cr(III) onto bypass cement kiln dust (BCKD) were conducted by varying
various parameters such as contact time, initial chromium ion concentration, BCKD dose and initial pH. Langmuir and
Freundlich isotherm models were applied to the equilibrium data. The percentage adsorption increased with decrease in
pH and showed maximum removal of Cr(III) at initial pH value 2.5. Thermodynamic parameters such as standard Gibbs
energy ΔGo
, heat of adsorption ΔHo
and entropy ΔSo
were calculated. These thermodynamic parameters showed the
process to be endothermic in nature. Desorption of Cr(III) from the spent BCKD has also been investigated. Desorption
process suggest that the adsorption of Cr(III) ions on BCKD involves physisorption mechanism. Removal of Cr(III) from
tannery wastewater by BCKD was testified.
Publication Date
8/28/2010
Publisher
13th Conference on Process Integration, Modelling and Optimisation for Energy Saving and Pollution Reduction
علي يوسف عكاشة | Aly Y. Okasha | 10308