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Organic Colloids in Forest Soils: 2. Abiotic Immobilization in the Mineral Soil

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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  • Universität Bayreuth

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OriginalspracheEnglisch
Seiten (von - bis)147-151
Seitenumfang5
FachzeitschriftPhysics and chemistry of the earth
Jahrgang23
Ausgabenummer2
PublikationsstatusVeröffentlicht - 25 Juni 1998
Extern publiziertJa

Abstract

Colloid-assisted contaminant transport in soils depends on the concentration, the chemical composition and the charge of the carrier. These characteristics are altered when organic colloids derived from the forest canopy and the forest floor enters the mineral soil. Field studies and laboratory sorption experiments combined with destructive and non-destructive analytical methods were used to identify the controls on the colloidal organic matter immobilization during the passage of the mineral soil. The results indicated that the immobilization is mainly due to sorption on Fe and Al hydrous oxides. The degree of binding depends on the amount of sorbents, their initial loadings with organic matter, and the chemical features of the organic colloids. The lignin-derived moieties seem to be preferentially removed from the soil solution whereas the saccharides accumulate in the soil solution. Thus, the passage of organic solutes through the mineral soil is a chromatographic process which controls the amount and the chemical characteristics of organic colloids reaching the hydrosphere.

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Organic Colloids in Forest Soils: 2. Abiotic Immobilization in the Mineral Soil. / Kaiser, K.; Guggenberger, G.; Zech, W.
in: Physics and chemistry of the earth, Jahrgang 23, Nr. 2, 25.06.1998, S. 147-151.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

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TY - JOUR

T1 - Organic Colloids in Forest Soils:

T2 - 2. Abiotic Immobilization in the Mineral Soil

AU - Kaiser, K.

AU - Guggenberger, G.

AU - Zech, W.

N1 - Funding information: Acknowledgment The study was part of the Deutsche Forschungsgemeinschaft funded research program ROSIG. We are indebted to Ludwig Haumaier for recording the NMR spectra.

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Y1 - 1998/6/25

N2 - Colloid-assisted contaminant transport in soils depends on the concentration, the chemical composition and the charge of the carrier. These characteristics are altered when organic colloids derived from the forest canopy and the forest floor enters the mineral soil. Field studies and laboratory sorption experiments combined with destructive and non-destructive analytical methods were used to identify the controls on the colloidal organic matter immobilization during the passage of the mineral soil. The results indicated that the immobilization is mainly due to sorption on Fe and Al hydrous oxides. The degree of binding depends on the amount of sorbents, their initial loadings with organic matter, and the chemical features of the organic colloids. The lignin-derived moieties seem to be preferentially removed from the soil solution whereas the saccharides accumulate in the soil solution. Thus, the passage of organic solutes through the mineral soil is a chromatographic process which controls the amount and the chemical characteristics of organic colloids reaching the hydrosphere.

AB - Colloid-assisted contaminant transport in soils depends on the concentration, the chemical composition and the charge of the carrier. These characteristics are altered when organic colloids derived from the forest canopy and the forest floor enters the mineral soil. Field studies and laboratory sorption experiments combined with destructive and non-destructive analytical methods were used to identify the controls on the colloidal organic matter immobilization during the passage of the mineral soil. The results indicated that the immobilization is mainly due to sorption on Fe and Al hydrous oxides. The degree of binding depends on the amount of sorbents, their initial loadings with organic matter, and the chemical features of the organic colloids. The lignin-derived moieties seem to be preferentially removed from the soil solution whereas the saccharides accumulate in the soil solution. Thus, the passage of organic solutes through the mineral soil is a chromatographic process which controls the amount and the chemical characteristics of organic colloids reaching the hydrosphere.

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DO - 10.1016/S0079-1946(98)00005-6

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