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Citation: LEI Hai-Bo, GAO Bao-Jiao, SHEN Yan-Ling. Adsorption Property of Novel Composite Material PEI/SiO₂ for Bilirubin[J]. Chinese Journal of Applied Chemistry, ;2007, 24(5): 580-584. shu

Adsorption Property of Novel Composite Material PEI/SiO₂ for Bilirubin

1.
Chemical Engineering Department, North University of China, Taiyuan 030051

Corresponding author: GAO Bao-Jiao,
Received Date: 2 June 2006
Available Online: 18 November 2006

Polyethylenimine (PEI) was grafted on silica gel particle surface with γ-chloropropyltrimethoxysilane as the coupling agent,and novel composite adsorption material PEI/SiO₂ for biomedical application was prepared.The effect of pH,ionic strength of the medium and the bound amount of PEI on PEI/SiO₂ on the adsorption quantity of PEI/SiO₂ for bilirubin was examined.The static adsorption experiment results show that PEI/SiO₂ has a strong adsorption ability for Bilirubin.The PEI macromolecules on silica particles can produce a strong adsorption effect for bilirubin by means of electrostatic interaction.The isothermal adsorption obeyed the Freundlich equation,and the equilibrium adsorption amount reached 13.17 mg/g as the preliminary concentration of bilirubin was 0.590 g/L.The pH value of the aqueous solution has a great effect on the adsorption property of PEI/SiO₂.In a near neutral solution (pH=6),there was a maximum adsorption amount,and in acidic and basic solutions,the adsorption actions were all weak.
- bilirubin,
- adsorption material,
- polyethyleneimine,
- electrostatic interaction,
- adsorption
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Adsorption Property of Novel Composite Material PEI/SiO₂ for Bilirubin