Dynamics in composition and size-class distribution of humic substances in profundal sediments of Lake Constance

被引：20

作者：

Kappler, A ^{[1
]}

Ji, R ^{[1
]}

Schink, B ^{[1
]}

Brune, A ^{[1
]}

机构：

[1] Univ Konstanz, Fac Biol, Lehrstuhl Mikrobielle Okol & Limnol, D-78457 Constance, Germany

来源：

ORGANIC GEOCHEMISTRY | 2001年 / 32卷 / 01期

关键词：

lake sediment; size-class distribution; humic substances; humification processes;

D O I：

10.1016/S0146-6380(00)00160-1

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Organic matter from profundal lake sediments was fractionated and analyzed with high depth resolution, and the size-class distribution of humic substances was determined by gel-permeation chromatography. Together with a depth-dependent increase of the thermal stability of the organic matter and an increasing C/N atomic ratio of the humic acids, the size-distribution patterns of different fractions indicated an increasing degree of humification with depth. The main stabilization processes occurred in the surface layer (0-2 cm depth), which is clearly distinguished from the deeper sediment. The depth profiles also indicated that humification in lake sediments consists of simultaneous degradation and polymerization processes. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：3 / 10

页数：8

共 34 条

[1]

[Anonymous], 1994, HUMUS CHEM GENESIS C

[2]

Bourgeois ML, 1997, ENCEPHALE, V23, P35

[3] Life at the oxic-anoxic interface: microbial activities and adaptations [J].

Brune, A ;

Frenzel, P ;

Cypionka, H .

FEMS MICROBIOLOGY REVIEWS, 2000, 24 (05) :691-710

[4] THE ANAEROBIC DEGRADATION OF ORGANIC-MATTER IN DANISH COASTAL SEDIMENTS - IRON REDUCTION, MANGANESE REDUCTION, AND SULFATE REDUCTION [J].

CANFIELD, DE ;

THAMDRUP, B ;

HANSEN, JW .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1993, 57 (16) :3867-3883

[5]

FICHEZ R, 1991, OCEANOL ACTA, V14, P369

[6] EXCLUSION CHROMATOGRAPHY WITH CARBON DETECTION - A TOOL FOR FURTHER CHARACTERIZATION OF DISSOLVED ORGANIC-CARBON [J].

GLOOR, R ;

LEIDNER, H ;

WUHRMANN, K ;

FLEISCHMANN, T .

WATER RESEARCH, 1981, 15 (04) :457-462

[7] COMPARISON OF INFRARED SPECTRA OF SYNTHETIC AND NATURAL HUMIC AND FULVIC ACIDS [J].

GOH, KM ;

STEVENSON, FJ .

SOIL SCIENCE, 1971, 112 (06) :392-+

[8] Elemental, functional group and infrared spectroscopic analysis of actinomycete melanins from Brazilian soils [J].

Gomes, RC ;

Mangrich, AS ;

Coelho, RRR ;

Linhares, LF .

BIOLOGY AND FERTILITY OF SOILS, 1996, 21 (1-2) :84-88

[9]

HALL W, 1992, EDN, V37, P113

[10]

Hatcher P. G., 1988, Humic substances and their role in the environment., P59

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