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Soil processes and trace metals

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Presentation on theme: "Soil processes and trace metals"— Presentation transcript:

1 Soil processes and trace metals
Have some ideas about metal concentrations in soils Get familiar with FDEP Soil Cleanup Target Levels Factors controlling metal behaviors in soils

2 Concentrations of trace elements in soils
Content of various elements in lithosphere and soils (Lindsay, W. L Chemical equilibria in soils. New York, NY, John Wiley & Sons) Ranges and means of concentrations of trace elements in soils calculated on the world scale (Kabata-Pendias, A. and H. Pendias Trace elements in soils and plants. Boca Raton, FL, CRC Press.) Have two sheets of handouts Bring the book

3 Handouts: 4 tables Why figure and tables don’t add up??? Adriano, D. C Trace elements in the terrestrial environment. 2nd ed. Springer-Verlag, New York.

4 JC lecture Plot of the atmospheric enrichment factor (AEF) for some metals where AEF = log (X atm/Al atm)/(X rocks/A1 rocks), versus the boiling points of their oxides

5 Handouts: 4 tables Why figure and tables don’t add up??? Adriano, D. C Trace elements in the terrestrial environment. 2nd ed. Springer-Verlag, New York.

6 Handouts: 4 tables Why figure and tables don’t add up??? Adriano, D. C Trace elements in the terrestrial environment. 2nd ed. Springer-Verlag, New York.

7 Handouts: 4 tables Why figure and tables don’t add up??? Adriano, D. C Trace elements in the terrestrial environment. 2nd ed. Springer-Verlag, New York.

8 JCB lecture

9

10 Trace elements < 1,000 ppm Some are enriched Concentrations vary
Fig. 15. Trace elements in soils compared to their abundance in the lithosphere. Open circles = mean in lithosphere; Solid circles = mean in topsoils; Vertical lines = Soil range Trace elements < 1,000 ppm Some are enriched Concentrations vary Kabata-Pendias and Pendias (1992)

11 EF< 0.5 EF= 0.5-2 no change EF>2-10 EF>10
significant depletion EF= no change EF>2-10 some enrichment EF>10 strong enrichment Sposito, 1989


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