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

Arsenate, As (V), sorption onto synthetic disordered mackinawite (FeSam) follows Langmuir-type
\nbehaviour. As (V) is not reduced prior to or during sorption. Arsenite, As (III) sorption can be expressed by a
\nFreundlich isotherm. Comparison of the experimental sorption isotherms to field data describing the mobility of
\narsenic in a Bangladesh aquifer shows that arsenic mobility may be controlled by As (V) sorption onto FeSam in the
\naquifer sediment.