Characterization and structural modelling of humic substances in field soil displaying significant differences from previously proposed structures

C.N. Albers; G.T. Banta; O.S. Jacobsen; P.E. Hansen

doi:10.1111/j.1365-2389.2008.01036.x

Characterization and structural modelling of humic substances in field soil displaying significant differences from previously proposed structures

C.N. Albers
, G.T. Banta
, O.S. Jacobsen
, P.E. Hansen

Department of Geochemistry

Research output: Contribution to journal › Article › Research › peer-review

54 Citations (Scopus)

Abstract

Humic substances (HS) often are dominant constituents of soil organic matter. In this study 28 fractions of HS were purified and chemically characterized from horizons of three Danish soils differing in texture. A commercial humic acid (HA) was included for comparison. The HS fractions were chemically characterized by CHNS analysis, pH-titration and liquid state ¹³C-NMR experiments. Amino acids and carbohydrates could clearly be differentiated from other O- and N-aliphatic compounds. The data were analysed by principal component analysis. The analysis revealed greater difference between HS fractions than between locations. The characteristics of the HS fractions were compared with several models in the literature and an average structural model for one HA and one FA fraction is proposed.

Original language	English
Pages (from-to)	693-705
Number of pages	13
Journal	European Journal of Soil Science
Volume	59
Issue number	4
DOIs	https://doi.org/10.1111/j.1365-2389.2008.01036.x
Publication status	Published - Aug 2008

Programme Area

Programme Area 2: Water Resources

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abstract = "Humic substances (HS) often are dominant constituents of soil organic matter. In this study 28 fractions of HS were purified and chemically characterized from horizons of three Danish soils differing in texture. A commercial humic acid (HA) was included for comparison. The HS fractions were chemically characterized by CHNS analysis, pH-titration and liquid state 13C-NMR experiments. Amino acids and carbohydrates could clearly be differentiated from other O- and N-aliphatic compounds. The data were analysed by principal component analysis. The analysis revealed greater difference between HS fractions than between locations. The characteristics of the HS fractions were compared with several models in the literature and an average structural model for one HA and one FA fraction is proposed.",

author = "C.N. Albers and G.T. Banta and O.S. Jacobsen and P.E. Hansen",

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AU - Albers, C.N.

AU - Banta, G.T.

AU - Jacobsen, O.S.

AU - Hansen, P.E.

PY - 2008/8

Y1 - 2008/8

N2 - Humic substances (HS) often are dominant constituents of soil organic matter. In this study 28 fractions of HS were purified and chemically characterized from horizons of three Danish soils differing in texture. A commercial humic acid (HA) was included for comparison. The HS fractions were chemically characterized by CHNS analysis, pH-titration and liquid state 13C-NMR experiments. Amino acids and carbohydrates could clearly be differentiated from other O- and N-aliphatic compounds. The data were analysed by principal component analysis. The analysis revealed greater difference between HS fractions than between locations. The characteristics of the HS fractions were compared with several models in the literature and an average structural model for one HA and one FA fraction is proposed.

AB - Humic substances (HS) often are dominant constituents of soil organic matter. In this study 28 fractions of HS were purified and chemically characterized from horizons of three Danish soils differing in texture. A commercial humic acid (HA) was included for comparison. The HS fractions were chemically characterized by CHNS analysis, pH-titration and liquid state 13C-NMR experiments. Amino acids and carbohydrates could clearly be differentiated from other O- and N-aliphatic compounds. The data were analysed by principal component analysis. The analysis revealed greater difference between HS fractions than between locations. The characteristics of the HS fractions were compared with several models in the literature and an average structural model for one HA and one FA fraction is proposed.

UR - https://www.scopus.com/pages/publications/47249135431

U2 - 10.1111/j.1365-2389.2008.01036.x

DO - 10.1111/j.1365-2389.2008.01036.x

M3 - Article

AN - SCOPUS:47249135431

SN - 1351-0754

VL - 59

SP - 693

EP - 705

JO - European Journal of Soil Science

JF - European Journal of Soil Science

IS - 4

ER -

Characterization and structural modelling of humic substances in field soil displaying significant differences from previously proposed structures

Abstract

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