Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface

Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface

The sorption of some amino acids (Aa) onto a fumed silica surface in the presence of copper ions was studied over the pH range 4–8. The adsorption process was interpreted in terms of the surface complexation theory using the basic Stern model (BSM). Equilibrium parameters were determined using the G...

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Main Authors: Nataliya M. Vlasova, Ol'ga V. Markitan
Format: Article
Language:English
Published: Hindawi - SAGE Publishing 2007-02-01
Series:Adsorption Science & Technology
Online Access:https://doi.org/10.1260/026361707781485762
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spelling doaj-0160998537df4a2ab5c0f271a075978e2021-04-02T11:39:26ZengHindawi - SAGE PublishingAdsorption Science & Technology0263-61742048-40382007-02-012510.1260/026361707781485762Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica SurfaceNataliya M. VlasovaOl'ga V. MarkitanThe sorption of some amino acids (Aa) onto a fumed silica surface in the presence of copper ions was studied over the pH range 4–8. The adsorption process was interpreted in terms of the surface complexation theory using the basic Stern model (BSM). Equilibrium parameters were determined using the GRFIT program package. Only basic amino acids such as arginine, lysine and ornithine were sorbed from individual aqueous solutions onto the silica surface. Their sorption was modelled in terms of outer-sphere surface complexes. All these amino acids were sorbed onto silica in the presence of copper ions. Modelling of the amino acid sorption was based on ternary surface complexes. This allowed us to simulate the experimental data at different molar ratios Cu 2+ :Aa (1:1 and 1:2) over the total pH range studied.https://doi.org/10.1260/026361707781485762
collection DOAJ
language English
format Article
sources DOAJ
author Nataliya M. Vlasova
Ol'ga V. Markitan
spellingShingle Nataliya M. Vlasova
Ol'ga V. Markitan
Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
Adsorption Science & Technology
author_facet Nataliya M. Vlasova
Ol'ga V. Markitan
author_sort Nataliya M. Vlasova
title Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
title_short Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
title_full Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
title_fullStr Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
title_full_unstemmed Effect of Copper Ions upon the Sorption of Amino Acids onto a Fumed Silica Surface
title_sort effect of copper ions upon the sorption of amino acids onto a fumed silica surface
publisher Hindawi - SAGE Publishing
series Adsorption Science & Technology
issn 0263-6174
2048-4038
publishDate 2007-02-01
description The sorption of some amino acids (Aa) onto a fumed silica surface in the presence of copper ions was studied over the pH range 4–8. The adsorption process was interpreted in terms of the surface complexation theory using the basic Stern model (BSM). Equilibrium parameters were determined using the GRFIT program package. Only basic amino acids such as arginine, lysine and ornithine were sorbed from individual aqueous solutions onto the silica surface. Their sorption was modelled in terms of outer-sphere surface complexes. All these amino acids were sorbed onto silica in the presence of copper ions. Modelling of the amino acid sorption was based on ternary surface complexes. This allowed us to simulate the experimental data at different molar ratios Cu 2+ :Aa (1:1 and 1:2) over the total pH range studied.
url https://doi.org/10.1260/026361707781485762
work_keys_str_mv AT nataliyamvlasova effectofcopperionsuponthesorptionofaminoacidsontoafumedsilicasurface
AT olgavmarkitan effectofcopperionsuponthesorptionofaminoacidsontoafumedsilicasurface
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