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Biogeochemical interface formation in soils as controlled by different components

We consider clay minerals, iron oxides and charcoal as major components controlling the formation of interfaces relevant for sorption of organic chemicals, as they control the assemblage of organic matter and mineral particles. We studied the formation of interfaces in batch incubation experiments with inoculated artificial soils consisting of model compounds (clay minerals, iron oxide, char) and natural soil samples. Results show a relevant contribution of both iron oxides and clay minerals to the formation of organic matter as sorptive interfaces for hydrophobic compounds. Thus, we intend to focus our work in the second phase on the characterization of the interface as formed by organic matter associated with clay minerals and iron oxides. The interfaces will be characterized by the BET-N2 and ethylene glycol monoethyl ether (EGME) methods and 129Xe and 13C NMR spectroscopy for determination of specific surface area, sorptive domains in the organic matter and microporosity. A major step forward is expected by the analysis of the composition of the interface at different resolution by reflected-light microscopy (mm scale), SEM (scanning electron microscopy, micrometer scale) and secondary ion mass spectrometry at the nanometer scale (nanoSIMS). The outcomes obtained in combination with findings from cooperation partners will help to unravel the contribution of different types of soil components on the formation and characteristics of the biogeochemical interfaces and their effect on organic chemical sorption.

GTS Bulletin: WODL45 EDZW - Warnings (details are described in the abstract)

The WODL45 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (DL): Germany (Remarks from Volume-C: STRONG WIND, GALE AND STORM WARNINGS FOR GERMAN BIGHT AND BALTIC SEA (IN GERMAN/ENGLISH))

GTS Bulletin: WOEN69 EDZW - Warnings (details are described in the abstract)

The WOEN69 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (EN): Northern Europe (Remarks from Volume-C: WARNING FOR NORTH SEA AND BALTIC SEA (IN ENGLISH))

GTS Bulletin: WOEN88 EDZW - Warnings (details are described in the abstract)

The WOEN88 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (EN): Northern Europe (Remarks from Volume-C: WARNING FOR GERMAN BIGHT (IN ENGLISH))

GTS Bulletin: WOBQ61 EDZW - Warnings (details are described in the abstract)

The WOBQ61 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (BQ): Baltic Sea area (Remarks from Volume-C: WARNING FOR THE BALTIC SEA (IN ENGLISH))

GTS Bulletin: WODN41 EKMK - Warnings (details are described in the abstract)

The WODN41 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (DN): Denmark (Remarks from Volume-C: NilReason)

GTS Bulletin: WODL50 EDZW - Warnings (details are described in the abstract)

The WODL50 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (DL): Germany (Remarks from Volume-C: ORNOB WARNING)

GTS Bulletin: WOSN01 ESSB - Warnings (details are described in the abstract)

The WOSN01 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (SN): Sweden (Remarks from Volume-C: NilReason)

GTS Bulletin: WOSN01 ESKN - Warnings (details are described in the abstract)

The WOSN01 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (SN): Sweden (Remarks from Volume-C: NilReason)

GTS Bulletin: WOSN01 ESKS - Warnings (details are described in the abstract)

The WOSN01 TTAAii Data Designators decode as: T1 (W): Warnings T1T2 (WO): Other A1A2 (SN): Sweden (Remarks from Volume-C: NilReason)

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