Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 141-146 |
| Seitenumfang | 6 |
| Fachzeitschrift | Physics and chemistry of the earth |
| Jahrgang | 23 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 25 Juni 1998 |
| Extern publiziert | Ja |
Abstract
Colloid-assisted contaminant transport in soils strongly depends on the concentration, the chemical composition and the charge behavior of the carrier. Organic colloids are produced in significant amounts in the forest canopy and in the forest floor. Besides pure chemical dissolution equilibria biotic processes comprise to the mobilization of organic colloids. 13C NMR spectroscopy and destructive analytical methods applied on solid and colloidal organic matter obtained in the forest floor was used to assess the formation and mobilization pathways of organic colloids. The studies suggested that a major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is directly controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. There are indications that the microbial-controlled production of organic colloids in the forest floor is vulnerable to changes in the soil environment.
ASJC Scopus Sachgebiete
- Erdkunde und Planetologie (insg.)
- Allgemeine Erdkunde und Planetologie
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in: Physics and chemistry of the earth, Jahrgang 23, Nr. 2, 25.06.1998, S. 141-146.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Organic Colloids in Forest Soils:
T2 - 1. Biochemical Mobilization in the Forest Floor
AU - Guggenberger, G.
AU - Kaiser, K.
AU - Zech, W.
PY - 1998/6/25
Y1 - 1998/6/25
N2 - Colloid-assisted contaminant transport in soils strongly depends on the concentration, the chemical composition and the charge behavior of the carrier. Organic colloids are produced in significant amounts in the forest canopy and in the forest floor. Besides pure chemical dissolution equilibria biotic processes comprise to the mobilization of organic colloids. 13C NMR spectroscopy and destructive analytical methods applied on solid and colloidal organic matter obtained in the forest floor was used to assess the formation and mobilization pathways of organic colloids. The studies suggested that a major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is directly controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. There are indications that the microbial-controlled production of organic colloids in the forest floor is vulnerable to changes in the soil environment.
AB - Colloid-assisted contaminant transport in soils strongly depends on the concentration, the chemical composition and the charge behavior of the carrier. Organic colloids are produced in significant amounts in the forest canopy and in the forest floor. Besides pure chemical dissolution equilibria biotic processes comprise to the mobilization of organic colloids. 13C NMR spectroscopy and destructive analytical methods applied on solid and colloidal organic matter obtained in the forest floor was used to assess the formation and mobilization pathways of organic colloids. The studies suggested that a major part of the organic solutes are lignocellulose-degradation products being strongly microbially altered in the course of ligninolysis. The release of lignin-derived moieties into the soil solution is directly controlled by their degree of biooxidation. Microorganisms contribute also directly to the organic solutes through the release of microbial metabolites. There are indications that the microbial-controlled production of organic colloids in the forest floor is vulnerable to changes in the soil environment.
UR - http://www.scopus.com/inward/record.url?scp=0031663708&partnerID=8YFLogxK
U2 - 10.1016/S0079-1946(98)00004-4
DO - 10.1016/S0079-1946(98)00004-4
M3 - Article
AN - SCOPUS:0031663708
VL - 23
SP - 141
EP - 146
JO - Physics and chemistry of the earth
JF - Physics and chemistry of the earth
SN - 0079-1946
IS - 2
ER -