Adsorption of rhodamine 6G from aqueous solutions on activated carbon
Journal
Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Journal Volume
36
Journal Issue
5
Pages
715-725
Date Issued
2001
Author(s)
Abstract
The effects of particle size (0.5 ? 1.0 mm), temperature (30 ? 60¢XC), and solution pH (7 ? 9) on the adsorption equilibrium of dye Rhodamine 6G by activated carbon were studied in batch modes. The isotherm data could be well described by the Langmuir equation. Under the ranges tested, a maximum adsorption capacity of 44.7 mg/g was obtained. Batch kinetic parameters such as the Lagergren's rate constant and intraparticle diffusion coefficient of adsorption were determined. It has been shown that the intraparticle diffusion of dye molecules within the adsorbents was identified as the rate-limiting step in the present adsorption process.
Subjects
Activated carbon
Adsorption
Equilibrium
Kinetics
Rhodamine 6G
Type
journal article