Extended Data Table 3 Measured and modelled initial concentration of minerals, arsenic solid phase and organic matter. Units are in [mol/L of bulk aquifer volume]. Sorbed initial concentrations are not predefined in the model but the product of initial dissolved concentrations (extended data Table 2) and iron oxide concentration in the sediment (extended data Table 3) (nd = not determined; n/a = not applicable)

From: The river–groundwater interface as a hotspot for arsenic release