Research on the Adsorption Abilities and Mechanism of the Grafted Composite Adsorption Material PEI/SiO2 towards p-Nitrophenol

Rui Kui Du; Fu Qiang An

doi:10.4028/www.scientific.net/AMR.634-638.2009

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 634-638Research on the Adsorption Abilities and Mechanism...

Research on the Adsorption Abilities and Mechanism of the Grafted Composite Adsorption Material PEI/SiO₂ towards p-Nitrophenol

Abstract:

Functional macromolecule polyethyleneimine (PEI) is grafted onto the surface of silica gel particles with the “graft to” method using γ-chloropropyl trimethoxy silane as coupling agent, and the grafted composite adsorption material PEI/SiO₂ is prepared. The adsorption abilities and mechanism of PEI/SiO₂ towards p-nitrophenol are also studied. The results show that PEI/SiO₂ possesses very strong adsorption ability for p-nitrophenol by hydrogen bond interaction. The adsorption amount can reach to 78.6mg•g⁻¹. The adsorption is physical adsorption of a monomolecular layer and conforms to the Freundlich adsorption model. The pH and temperature have great influence on the adsorption capacity. As sodium hydroxide solution is used as eluent, and the adsorbed phenol is eluted easily from PEI/SiO₂.

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Advanced Materials Research (Volumes 634-638)

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2009-2013

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https://doi.org/10.4028/www.scientific.net/AMR.634-638.2009

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January 2013

Authors:

Rui Kui Du, Fu Qiang An

Keywords:

Adsorption, Mechanism, p-Nitrophenol, Polyethyleneimine

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