Issue 10, 2006
From the journal:

Journal of Materials Chemistry

The thermodynamics of sequestration of toxic copper(ii) metal ion pollutants from aqueous media by l-cysteine methyl ester modified glassy carbon spheres

Biljana Šljukić,a   Gregory G. Wildgoose,a   Alison Crossley,b   John H. Jones,c   Li Jiang,d   Timothy G. J. Jonesd  and  Richard G. Compton*a  

* Corresponding authors

a Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford, OX1 3QZ, United Kingdom
E-mail: richard.compton@chem.ox.ac.uk

b Materials Department, University of Oxford, Parks Road, Oxford, OX1 3PH, United Kingdom

c Chemical Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, United Kingdom

d Schlumberger Cambridge Research, High Cross, Madingley Road, Cambridge, CB3 0EL, United Kingdom

Abstract

L-Cysteine methyl ester modified glassy carbon powder (CysOMe-GC) has been shown to have potential for the removal of toxic heavy metal ions, such as copper(II), cadmium(II) and arsenic(III), from “real” water samples. To develop this material for environmental applications we must develop an understanding of the thermodynamic parameters controlling the uptake of metal ions by the modified carbon powder. Here we characterise the material using X-ray photoelectron spectroscopy (XPS), before investigating the effect of varying the solution pH, the concentration of copper(II) ions and the mass of CysOMe-GC powder added to the solution using square wave voltammetry (SWV). This data allows us to understand the thermodynamics controlling the copper(II) ion uptake and elucidate that the adsorption of copper(II) onto the CysOMe modified surface is controlled by a Freundlich isotherm.

Graphical abstract: The thermodynamics of sequestration of toxic copper(ii) metal ion pollutants from aqueous media by l-cysteine methyl ester modified glassy carbon spheres

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Article information

DOI
https://doi.org/10.1039/B514819G
Article type
Paper
Submitted
19 Oct 2005
Accepted
19 Dec 2005
First published
09 Jan 2006

J. Mater. Chem., 2006,16, 970-976

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The thermodynamics of sequestration of toxic copper(II) metal ion pollutants from aqueous media by L-cysteine methyl ester modified glassy carbon spheres

B. Šljukić, G. G. Wildgoose, A. Crossley, J. H. Jones, L. Jiang, T. G. J. Jones and R. G. Compton, J. Mater. Chem., 2006, 16, 970 DOI: 10.1039/B514819G

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