Fig. 3

DG model output dose metrics. DG model dose metric output data (in bottom 10 μm) for SiO₂, Fe₂O₃, TiO₂ and CeO₂ nanomaterials (C ₀ = 0.1 mg ml⁻¹, column height = 3 mm, d _H = volume-averaged mean (Table 1), reflective boundary condition) from 0 to 120 h. a ENM mass concentration (mg ml⁻¹) and mass deposited per well bottom surface area (mg cm⁻²). b ENM surface area concentration (cm² ml⁻¹) and ENM surface area deposited per unit floor surface area (cm² cm⁻²). c Particle number concentration (N ml⁻¹) and particle number deposited per unit area (N cm⁻²)