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Soil Analysis Of A Volunteer Wetland

Soil Analysis Of A Volunteer Wetland. Danette Miller Advisors: Dr. Nairn and Dr. Strevett University of Oklahoma. Overview. Importance of substrate Field methods Laboratory methods Analysis Results Conclusions. Substrate . Sink Long term

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Soil Analysis Of A Volunteer Wetland

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  1. Soil Analysis Of A Volunteer Wetland Danette Miller Advisors: Dr. Nairn and Dr. Strevett University of Oklahoma

  2. Overview • Importance of substrate • Field methods • Laboratory methods • Analysis • Results • Conclusions

  3. Substrate • Sink • Long term retention of metals • Types • Organic • Mineral

  4. Problem Statement • Is the substrate in the volunteer wetland a sink for soluble metals in the mine water discharge?

  5. Study Site

  6. Field Methods • Sample collection • Auger, slide hammer, manual extraction • Replicates • Sample storage

  7. Laboratory Methods • pH • Moisture content • Particle density • Pore space • Bulk density • Total metals • Microwave Digestion • AA spectrophotometer

  8. Results • pH • 6.08 to 7.56 • Moisture content • Surface: 55% to 86% • Subsurface: 25% to 42% • Particle density • Surface: 0.26 to 0.56 g/cm3 • Subsurface: 0.27 to 0.57 g/cm3

  9. Results • Bulk Density • Surface: 0.3 to 0.6 g/cm3 • Subsurface: ND • Total metals • Stratified trends

  10. Results: Iron (Fe) Trends

  11. Results: Zinc (Zn) Trends

  12. Conclusions • Substrate is a sink • Trends • Surface iron concentrations are elevated • Subsurface iron concentrations are similar to background levels • Zinc trends were similar to iron trends

  13. Future Research • Additional metals • Pb, Cd • Available metals • metal concentration available for biomass uptake

  14. Acknowledgements • NSF • Dr. Nairn and Dr. Strevett • REU lab research crew • Carrie Evenson and Jane Sund • Jacob Manko and Todd Wolfard • Erin Breetzke and Lisa Hare • Sharon and Janna Robbins • Wetland Willy

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