Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9674209 | Journal of Hazardous Materials | 2005 | 7 Pages |
Abstract
The adsorption of phenol onto chitin, a naturally occurring material was studied as a function of initial pH, temperature and initial phenol concentration. The highest phenol adsorption capacity was determined as 21.5 mg gâ1 for 300 mg dmâ3 initial phenol concentration at pH 1.0 and 40 °C. Adsorption data were well described by the Freundlich Model, although they could be modeled by the Langmuir equation. The pseudo-first-order and pseudo-second-order kinetic models were applied to test the experimental data. The pseudo-second-order kinetic model provided the best correlation of the experimental data compared to the pseudo-first-order model. The thermodynamic constants of the adsorption process; ÎG°, ÎH° and ÎS° were evaluated as -19.4 kJ molâ1 (at 40 °C), 10.2 kJ molâ1 and 0.093 kJ molâ1 Kâ1, respectively. These showed that adsorption of phenol on chitin was endothermic and spontaneous.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Health and Safety
Authors
Arzu Y. Dursun, Ã. Seda Kalayci,