Jump to main content
Jump to site search

Issue 75, 2014
Previous Article Next Article

Equilibrium and kinetics of aniline adsorption onto crosslinked sawdust-cyclodextrin polymers

Author affiliations

Abstract

A natural origin adsorbent was prepared by sawdust and beta-cyclodextrin (β-CD) for the removal of an organic compound (aniline) during water pollution accidents. The results of BET, SEM and FTIR analyses indicated that β-CD attaches on the sawdust surface and forms an organic film. Batch tests show that the optimum pH for aniline adsorption is in the range of 4–8. Adsorption equilibrium is achieved in 30 minutes, and the adsorption kinetics follows a pseudo-second-order kinetic model. The Langmuir model appears to fit the isotherm data better than the Freundlich model at 15 °C compared with that at 30 °C and 45 °C. The maximum adsorption capacity is estimated to be 84.03 mg g−1 at 15 °C (R2 > 0.99). The negative value of the standard entropy (ΔHo) and standard free energy (ΔGo) indicates an exothermic and spontaneous nature of the adsorption interaction. Moreover, the results of FTIR suggest that the formation of an inclusion complex between the β-CD and aniline molecules through host–guest interactions enhances the adsorption capability.

Graphical abstract: Equilibrium and kinetics of aniline adsorption onto crosslinked sawdust-cyclodextrin polymers

Back to tab navigation

Article information


Submitted
12 jún. 2014
Accepted
15 ágú. 2014
First published
15 ágú. 2014

RSC Adv., 2014,4, 40071-40077
Article type
Paper
Author version available

Equilibrium and kinetics of aniline adsorption onto crosslinked sawdust-cyclodextrin polymers

Q. Hu, D. Gao, H. Pan, L. Hao and P. Wang, RSC Adv., 2014, 4, 40071
DOI: 10.1039/C4RA05653A

Social activity

Search articles by author

Spotlight

Advertisements