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- Publisher
- Wiley
- Copyright
- "Copyright © 2010 Wiley Subscription Services, Inc., A Wiley Company"
- ISSN
- 1863-0650
- eISSN
- 1863-0669
- DOI
- 10.1002/clen.200900251
- Publisher site
- See Article on Publisher Site
Abstract
The removal of Malachite green (MG) from aqueous solutions by cross‐linked chitosan coated bentonite (CCB) beads was investigated and the CCB beads were characterized by Fourier Transform Infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) coupled with energy dispersive spectroscopy (EDS) and X‐ray diffraction (XRD) analysis. Solubility and swelling tests were performed in order to determine the stability of the CCB beads in acidic solution, basic solution and distilled water. The amount of MG adsorbed was shown to be influenced by the initial pH of the solution, contact time and the initial MG concentration. A kinetic study indicated that a pseudo‐second‐order model agreed well with the experimental data. From the Langmuir isotherm model, the maximum adsorption capacity of MG was found to be 435.0 mg g–1. Desorption tests were carried out at different concentrations of EDTA, H2SO4 and NaOH. However, all desorbing solutions showed zero recovery of MG at all concentrations.
Journal
Clean - Soil, Air, Water – Wiley
Published: Apr 1, 2010
Keywords: ; ; ; ;