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Colors

Colors. Colors. Fonts. Colors. Fonts. Colors. Colors. Colors. Fonts. Fonts. Colors. Colors. Fonts. Colors. Colors. Fonts. Colors. Colors. Fonts. 40. 36. 28. 24. 18. 12. Sizes. Sizes. Sizes. Sizes. Sizes. Sizes. Shadow. Shadow. Shadow. Shadow. Shadow.

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Colors

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  1. Colors Colors Fonts Colors Fonts Colors Colors Colors Fonts Fonts Colors Colors Fonts Colors Colors Fonts Colors Colors Fonts 40 36 28 24 18 12 Sizes Sizes Sizes Sizes Sizes Sizes Shadow Shadow Shadow Shadow Shadow

  2. University of Idaho Seasonal Cycling of Redox Active Metal(loid) Contaminants within a Mine Waste Impacted Wetland Matthew La Force

  3. Peeper Designs pH and Eh Sampler Element Sampler 5-cm 2-cm Water 20 mL Tubes 5 mL Tubes 40 cm 70 cm Sediment 2.5-cm PVC Rod 5-cm PVC Rod

  4. Sample Transporter Vacuum Gauge 3-Way Ball Valve N(2) gas 45 cm Vacuum Pump 25 cm 12-V Battery

  5. Sampling Devices

  6. Site 15 Site 10 Site 5

  7. Sampling Sites Site 15 Xanes Area Site 10 Site 5 60 m Data Logger 100 cm

  8. Temperature vs. Water Depth 30 100 Site 5 25 80 Temp. Temp oC Depth (cm) 20 Site 10 60 15 40 10 20 5 Site 15 0 0 Mar May Jul Sept Nov Jan 98-99

  9. Sodium Acetate/Acetic Acid Carbonates % As % Fe 25 20 Site 15 20 15 15 10 Fe 10 5 5 As 0 0 Mar May Jul Sept Nov Jan 98-99

  10. Melton Valley A Horizon PBET Extractions 100 90 80 70 Arsenic 60 Chromium 50 Percent Extracted 40 Lead 30 20 10 0 0 14 30 Days after soil spiking

  11. Melton Valley A Horizon PBET Extractions 100 90 80 70 Arsenic 60 Chromium 50 Percent Extracted As 40 Lead 30 20 10 0 0 14 30 Days after soil spiking

  12. Magnesium Chloride (Exchangeable) % Mn 50 Site 5 40 Site 10 Site 15 30 20 10 0 2/1/98 4/1/98 6/1/98 8/1/98 10/1/98 12/1/98 2/1/99 Month

  13. Mn Silicate AsV- Mn (hydr)oxide AsIII- Mn As Fe-As Silicate MnCO3 As2S3

  14. Selective Sequential Extractions 5 Spikes @ 5 mg L-1 10 mL of 1 M MgSO4 @ pH 7, 1 h Exchangeable As +Cr +Pb Homogenized X 5 20 mL of 0.2 M AOD@ pH 3, 3 h Noncrystalline Materials Fe-hydroxides “Clean” Melton Valley A or B Horizon @ Field Capacity 30 mL of 12 N HCl, 12 h Reactive/Crystalline Materials Microwave Digestion – Hydrofluoric-Nitric-Hydrochloric Acid (Residual or Silicates)

  15. Physiologically Based Extraction Test (PBET) 50 mL 1 M Glycine Drill- 12 RPM 0.5 g soil 1 hr Wood Stand 96 oF v 10 GallonTank

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