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Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions
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JoVE Journal Ambiente
Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions

Combined Size and Density Fractionation of Soils for Investigations of Organo-Mineral Interactions

DOI:
10.3791/58927-v

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08:38 min

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February 15, 2019

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,
1Faculty of Geosciences and Environment,University of Lausanne

Capitoli

  • 00:04Titolo
  • 00:38Light Fraction (LF) Separation
  • 04:13Separation of the hFs According to Particle Size
  • 04:54Separation of the Two Size Fractions According to Density
  • 06:31Results: Distribution of Materials Between Fractions as a Function of Soil Mineralogy for Two Horizons at Three Sites
  • 07:37Conclusion

Summary

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Combined size and density fractionation (CSDF) is a method to physically separate soil into fractions differing in texture (particle size) and mineralogy (density). The purpose is to isolate fractions with different reactivities towards soil organic matter (SOM), in order to better understand organo-mineral interactions and SOM dynamics.

Tags

Organo-mineral InteractionsSoil Organic MatterPhysical FractionationCarbon SequestrationSodium PolytungstateCentrifugationVacuum UltrafiltrationFree Light Fraction

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