Arsenic sorption onto disordered mackinawite as a control on the mobility of arsenic in the ambient sulphidic environment

M. Wolthers , L. Charlet (1) , C. H. van Der Weijden

1 LGIT - Laboratoire de Géophysique Interne et Tectonophysique

Arsenate, As (V), sorption onto synthetic disordered mackinawite (FeSam) 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 FeSam in the aquifer sediment.

Domains: Sciences of the Universe [physics]

M. Wolthers, L. Charlet, C. H. van Der Weijden. Arsenic sorption onto disordered mackinawite as a control on the mobility of arsenic in the ambient sulphidic environment. Journal de Physique IV (Proceedings), 2003, 107, pp.1377-1380. ⟨10.1051/jp4:20030558⟩. ⟨insu-03607101⟩