Transport properties of iodide in a sandy aquifer: Hydrogeological modelling and field tracer tests

•A new hydrogeological model was built in order to predict the behaviour of species.•To perform the model, two in-situ tracer tests with Dirac injection were led.•An anionic exclusion porosity of 2.5% was found for bromide and iodide tracers.•A sensitivity analysis was done where the Kd value was changed from 0.01 to 0.05: a limit value of 0.025L/kg can be given.