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| Titel |
Impact of Mn oxides on Fe mobilization during podzolization |
| VerfasserIn |
Jean-Thomas Cornelis, Hugues Titeux, Isabelle Caignet, Bruno Delvaux |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099018
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| Publikation (Nr.) |
 EGU/EGU2014-14756.pdf |
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| Zusammenfassung |
| Podzolization is one of the major pedogenic processes on earth which can thus influence the
soil solution chemistry of a large worldwide area through mobilization and precipitation of
dissolved organic carbon together with metals. Although podzolisation is largely studied, the
fundamental mechanisms involved in the formation of podzol are poorly understood. Several
theories underscore the key role of metals and DOC components and the interactions between
them. These interactions can be better understood by considering the soil solution chemistry.
In three months controlled laboratory column experiment, we therefore compare the leachate
signature of several soil showing different podzolization stages. Results were not
significantly different between soils except for Fe, Mn, SO42-and DOC. We notice that
concentrations of these components evolve with podzolization process: on the one
hand, Fe and DOC concentrations increase from the acid brown earth to the podzol
soil while Mn and SO42- ones decrease on the other hand. In the podzolization
development from an acid-brown earth, Mn evolution is of particular interest since Mn
oxides will prevent Fe mobilization and thus control the start of podzolization. |
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