Zusammenfassung
A hybrid silica mesoporous material with l-glutathione (LG) (SG-LGPS) was synthesized by a modified sol-gel process. The chemical and structural characterization of the SG-LGPS material was achieved by Fourier transform infrared, solid-state C-13 and Si-19 NMR, and X-ray diffraction. Surface analysis showed a specific surface area of 466.8 m(2) g(-1). X-ray photoelectron spectroscopy and energy ...
Zusammenfassung
A hybrid silica mesoporous material with l-glutathione (LG) (SG-LGPS) was synthesized by a modified sol-gel process. The chemical and structural characterization of the SG-LGPS material was achieved by Fourier transform infrared, solid-state C-13 and Si-19 NMR, and X-ray diffraction. Surface analysis showed a specific surface area of 466.8 m(2) g(-1). X-ray photoelectron spectroscopy and energy dispersive X-ray spectrometry measurements demonstrated the chemical composition of the hybrid material and the presence of As(V) after the uptake process. The adsorption performance for SG-LGPS reached a maximum arsenic uptake of 45.22 mg g(-1) at pH = 4; kinetics and equilibrium results were better described by the pseudo-second-order and Temkin models, respectively. Competitive ion adsorption studies were also performed. The uptake mechanism proposed for this material is a bidentate arsenic-glutathione complex. The present material proposed is as follows: (1) a new scope for environmentally friendly materials with amino acids and (2) a versatile adsorption application extended to other heavy metal ions due to the LG functional group composition.
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