| Kinetic, isotherm and sorption characteristics of some dyes using lupine peel powder |
| Paper ID : 1079-ISCBAS |
| Authors |
|
Nada Mohammed Sayed * Chemistry department, Faculty of Science, Al-Azhar University (Girls branch), Cairo, Egypt |
| Abstract |
| Synthetic dyes are considered harmful compounds to the environment even at slight quantity. Low cost natural adsorbents have been proved helpful for water treatment. In the present study, Lupine peel was used in inactivated (IL) and activated (AL) forms to remove Basic Fuchsine (BF) and Eosin (E) dyes from aqueous media. Adsorbents were characterized using FTIR and SEM analysis. Parameters such as solution pH, initial dye concentration, adsorbent dosage and size, contact time and temperature were performed in a batch system for controlling the operating conditions. Experimental data indicated that the adsorption process is a fast and spontaneous. A pseudo-second-order kinetic model provides the best fit to the experimental data of BF and E dyes adsorption onto IL and AL. The adsorption isotherm data of BF adsorption were fitted well to the Freundlich model, while E adsorption were well fitted to Langmuir adsorption isotherm. The maximum adsorption capacities of 1.5344, 2.9913, 0.7983 and 1.0921 mg/g for BF and E adsorption onto IL and AL respectively. According to (D-R) isotherm model, the values of E were in the range from 0.05 to 2.357 KJ/mol which indicating a physical sorption process. The activation parameters (∆Go, ∆Ho, ∆So) were calculated. The adsorption was endothermic and spontaneous with a higher preference of BF than E onto IL and AL. The results suggest that the lupine peel could be used as an inexpensive adsorbent for the removal of BF and E dyes from aqueous solutions. |
| Keywords |
| Lupine, Basic Fuchsine, Eosin, Adsorption, Kinetics, Isotherms |
| Status: Abstract Accepted (Poster Presentation) |