| Numéro |
J. Phys. IV France
Volume 107, May 2003
|
|
|---|---|---|
| Page(s) | 1377 - 1380 | |
| DOI | https://doi.org/10.1051/jp4:20030558 | |
J. Phys. IV France 107 (2003) 1377
DOI: 10.1051/jp4:20030558
Arsenic sorption onto disordered mackinawite as a control on the mobility of arsenic in the ambient sulphidic environment
M. Wolthers1, L. Charlet2 and C. H. van der Weijden11 Department of Geochemistry, Faculty of Earth Sciences, Utrecht University, P.O. Box 80021, 3508 Utrecht, The Netherlands
2 OSUG, Université Grenoble 1, CNRS, LGIT, BP. 53, 38041 Grenoble cedex 9, France
Abstract
Arsenate, As (V), sorption onto synthetic disordered mackinawite (FeS
) follows Langmuir-type
behaviour. As (V) is not reduced prior to or during sorption. Arsenite, As(III) sorption can be expressed by a
Freundlich isotherm. Comparison of the experimental sorption isotherms to field data describing the mobility of
arsenic in a Bangladesh aquifer shows that arsenic mobility may be controlled by As(V) sorption onto FeS
in the
aquifer sediment.
© EDP Sciences 2003