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Sorptive Properties of Specific Soils: Study on Organic Matter Impact

Explore sorptive properties of Canadian River Alluvium and powdered activated charcoal, simulate Cheshire and Florida peat soils, and compare results to determine if opaque particles govern sorption behavior.

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Sorptive Properties of Specific Soils: Study on Organic Matter Impact

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  1. REU Final Report Jeff Kyle Dr. David Sabatini Gavin James

  2. Research Question What are the sorptive properties of a specific soil based on the amount and type of organic matter contained within that soil?

  3. Objectives • Investigate sorption properties of Canadian River Alluvium (CRA) & powdered activated charcoal (PAC) • Simulate Cheshire and Florida Peat • Compare results

  4. Hypothesis Do opaque particles tend to govern sorption behavior?

  5. CRA PAC Simulated Cheshire Simulated Florida Peat Organic Contaminant (Phenanthrene, C14H10) Synthetic GW Materials Used

  6. Methods Used • Develop initial equilibrium sorption study • Develop initial kinetic sorption study • Determine synthetic soil makeup • Develop new equilibrium and kinetic sorption studies • Make comparisons

  7. Anticipated Results • Large Kfr and Koc values for PAC (why?) • Kfr and Koc values for simulated soils will differ (why and how?) • Kfr increases as foc increases

  8. Actual Results

  9. Actual Results (cont) • CRA Equilibrium Isotherm • % Opaque = 0.04 • % foc = 0.40 • Kfr = 357.27

  10. Actual Results (cont) • Cheshire Equilibrium Isotherm (top) • % Opaque = 0.08 • % foc = 1.40 • Kfr = 2789.80 • Sim. Cheshire (bottom) • % Opaque = 0.08 • % foc = 0.48 • Kfr = 2209.10

  11. Actual Results (cont) • Fl. Peat Equilibrium Isotherm (top) • % Opaque = 3.99 • % foc = 49.30 • Kfr = 70,574 • Sim. Fl. Peat (bottom) • % Opaque = 3.99 • % foc = 4.39 • Kfr = 56,760

  12. Actual Results (cont)

  13. Conclusions • CRA displays expected Kfr and Koc values • PAC displays large Kfr and Koc values, as expected • Soil comparisons follow general trends; opaque important, but must consider all OC

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