Figure 3: Porewater ultrafiltration.
From: Mobile uranium(IV)-bearing colloids in a mining-impacted wetland
The ultrafiltration results obtained from selected porewater samples from spot A collected in July 2012. Purple: 500 kDa–0.22 μm; green: 500 kDa–10 kDa; orange: <10 kDa. (a) For porewater at 15–25 cm depth, the total U, Fe and OC concentrations in the aqueous phase filtered with 0.22 μm pore-size membrane are 0.81 μM, 427 μM and 3.74 mM, respectively. (b) For porewater at 60–75 cm depth, the total U, Fe and OC concentrations in the aqueous phase filtered with 0.22 μm pore-size membrane are 0.90 μM, 402 μM and 2.61 mM, respectively. (c) For porewater at 115–130 cm depth, the total U, Fe and OC concentrations in the aqueous phase filtered with 0.22 μm pore-size membrane are 1.08, 423 and 2.35 mM, respectively. The s.d. (Δ) is <5% of the reported values based on three replicate measurements and is not shown.
