Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
584376 | Journal of Hazardous Materials | 2007 | 8 Pages |
Abstract
The sorption of Cr(III) from aqueous solutions on kaolinite has been studied by a batch technique. We have investigated how solution pH, ionic strength and temperature affect this process. The adsorbed amount of chromium ions on kaolinite has increased with increasing pH and temperature when it has decreased with increasing ionic strength. The sorption of Cr(III) on kaolinite is endothermic process in nature. Sorption data have been interpreted in terms of Freundlich and Langmuir equations. The adsorption isotherm was measured experimentally at different conditions, and the experimental data were correlated reasonably well by the adsorption isotherm of the Langmuir, and the isotherm parameters (qm and K) have been calculated as well. The enthalpy change for chromium adsorption has been estimated as 7.0Â kJÂ molâ1. The order of enthalpy of adsorption corresponds to a physical reaction.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Pinar Turan, Mehmet DoÄan, Mahir Alkan,