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Table 3 Summary of selected chemical constituent concentrations and physico-chemical parameters in samples from wells screened in the first and second aquifers

From: Vivianite formation as indicator of human impact in porous sediments

  1st aquifer 2nd aquifer
  pond nearby ICE-113 background pond nearby ICE-113 background
PO43− (mg/dm3) 10–40 0.6 (0.5–2.0)  < 0.5 5–20 0.4 (0.1–1.0)  < 0.5
SO42− (mg/dm3) 150–400 50 (30–100)  < 100 100–270 30(20–43)  < 50
pH 7.4–7.5 7.4 (7.3–7.6) 7.0–7.5 7.15–7.4 7.4 6.5–7.5
Eh (mV) 20–180 250 200–260 80–90 100 100–190
DO (mg/dm3) 0.3–0.4 0.5 0.5–2.0 0.3–0.35 0.25 0.25–0.4
NO3 (mg/dm3) 2–9 1.6 1–10 2–6 0.8  < 2
Fe (mg/dm3) 1.5–3.5 0.5  < 1.0 4–11 1.5 1–3
Mn (mg/dm3) 0.2–0.5 0.3 0.5–2.0 0.3–0.5 0.5  < 0.5
CO32− (mg/dm3)  < 1.0  < 1.0  < 1.0  < 1.0  < 1.0  < 1.0
HCO3 (mg/dm3) 1600–4800 350–600 400–700 1100–2600 500–650 500–650
General redox categories and processes Mixed (anoxic) NO3-Fe3+/SO4 Mixed (oxic-anoxic) O2-Fe3+/SO4 Mixed (anoxic) NO3-Fe3+/SO4
  1. Redox categories in the groundwater were identified by Jurgens et al. (2009)