Adsorption kinetics and thermodynamics of anionic dyes onto sewage sludge derived activated carbon Online publication date: Wed, 16-Mar-2011
by Jian-kun Xie, Qin-yan Yue, Bao-yu Gao, Qian Li
International Journal of Environment and Pollution (IJEP), Vol. 45, No. 1/2/3, 2011
Abstract: The adsorption kinetics and thermodynamics of two anionic dyes (Reactive Brilliant Red K-2BP and Acid Scarlet GR) on the Sewage Sludge Derived Activated Carbon (SAC) were studied by batch adsorption tests. It was found that, for Reactive Brilliant Red K-2BP, four kinetic models, i.e., the pseudo-second-order model, the modified pseudo-first-order model, the pseudo-first-order model, and the intra-particle diffusion model, all showed acceptable applicability for the adsorption process. For Acid Scarlet GR, the adsorption process conformed only to the pseudo-second-order kinetic model. The adsorption processes of two dyes on the SAC were spontaneous (ΔG0 < 0), endothermic in nature (ΔH0 > 0), and accompanied by an increase in entropy (ΔS0 > 0).
Online publication date: Wed, 16-Mar-2011
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Environment and Pollution (IJEP):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email email@example.com