Removal of anionic dye using amine-functionalized mesoporous hollow shells prepared from corn cob silica

Removal of anionic dye using amine-functionalized mesoporous hollow shells prepared from corn cob... This study evaluated the performance of amine-functionalized mesoporous hollow spheres obtained using corn cob (an agriculture byproduct) nanosilica as support material for amine immobilization (NH2-MHS) for removal of Congo Red (CR) dye from aqueous solution. Physical characteristics of adsorbents were studied using zeta potential, N2 adsorption–desorption isotherms, surface area, high-resolution transmission electron microscopy, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy. The effects of various physiochemical parameters such as pH (3–9), different adsorbents, temperature (15, 25, and 35 °C), initial dye concentration (10–500 mg/L), and adsorbent dosage (0.1–1.0 g) on the CR removal efficiency were investigated. The equilibrium adsorption data were well fit by the Freundlich model. The maximum adsorption capacity of CR onto NH2-MHS according to the Langmuir isotherm model was 98.72 mg/g at 35 °C and pH 7. The adsorption kinetics were well fit using a pseudo-second-order kinetic model. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Removal of anionic dye using amine-functionalized mesoporous hollow shells prepared from corn cob silica

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Publisher
Springer Netherlands
Copyright
Copyright © 2016 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-015-2415-5
Publisher site
See Article on Publisher Site

Abstract

This study evaluated the performance of amine-functionalized mesoporous hollow spheres obtained using corn cob (an agriculture byproduct) nanosilica as support material for amine immobilization (NH2-MHS) for removal of Congo Red (CR) dye from aqueous solution. Physical characteristics of adsorbents were studied using zeta potential, N2 adsorption–desorption isotherms, surface area, high-resolution transmission electron microscopy, Fourier-transform infrared spectroscopy, and field-emission scanning electron microscopy. The effects of various physiochemical parameters such as pH (3–9), different adsorbents, temperature (15, 25, and 35 °C), initial dye concentration (10–500 mg/L), and adsorbent dosage (0.1–1.0 g) on the CR removal efficiency were investigated. The equilibrium adsorption data were well fit by the Freundlich model. The maximum adsorption capacity of CR onto NH2-MHS according to the Langmuir isotherm model was 98.72 mg/g at 35 °C and pH 7. The adsorption kinetics were well fit using a pseudo-second-order kinetic model.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Jan 27, 2016

References

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