Figure 2: Porewater chemistry.
From: Mobile uranium(IV)-bearing colloids in a mining-impacted wetland
The profiles of (a) DO, (b) SO42−, (c) Fe(II), (d) FeTotal and (e) U in the porewater at spots A and B in November 2011 and July 2012. Blue circle: spot A November 2011; red circle: spot A July 2012; blue-crossed square: spot B November 2011; red-crossed square: spot B July 2012. The samples were filtered with 0.22 μm pore-size membrane. The porewater pH value is 5.8±0.2 in both seasons (Supplementary Fig. S1). The measured porewater temperature is 7–10 °C and 17–22 °C in November and July, respectively. Relatively fewer data points are available at spot B as compared with spot A because of the fact that numerous sampling chambers at spot B did not hold sufficient water to allow reliable porewater collection. The s.d. (Δ) is <5% of the reported values based on three replicate measurements and is not shown.
