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

被引：51
作者：
Albers, C. N. [1 ,2 ]
Banta, G. T. [3 ]
Jacobsen, O. S. [2 ]
Hansen, P. E. [1 ]
机构：
[1] Roskilde Univ, Dept Sci Syst & Models, Roskilde 4000, Denmark
[2] Geol Survey Denmark & Greenland, Dept Geochem, Copenhagen 1350, Denmark
[3] Roskilde Univ, Dept Environm Social & Spatial Change, Roskilde 4000, Denmark
来源：
EUROPEAN JOURNAL OF SOIL SCIENCE | 2008年 / 59卷 / 04期
关键词：
D O I：
10.1111/j.1365-2389.2008.01036.x
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
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 C-13-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.
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收藏
页码：693 / 705
页数：13
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