Journal ArticleDOI
Some chemical characteristics of paleosol humic acids
M. Schnitzer,G. Calderoni +1 more
TLDR
In this article, the authors extracted six paleosols in southern Italy, ranging in radiocarbon ages from 6,000 to 30,000 yr. Each HA was characterized by a number of chemical (elemental and functional group analyses) and spectroscopic (E4E6 ratios, 13C NMR, IR, ESR) methods and by chemical degradation, followed by separation and identification of the products by gas chromatography.About:
This article is published in Chemical Geology.The article was published on 1985-12-30. It has received 33 citations till now. The article focuses on the topics: Paleosol.read more
Citations
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Journal ArticleDOI
How does fire affect the nature and stability of soil organic nitrogen and carbon? A review
TL;DR: In this paper, the authors suggest a concept in which char is a heterogeneous mixture of heat-altered biopolymers with domains of relatively small polyaromatic clusters, but considerable substitution with N, O and S functional groups.
Journal ArticleDOI
Black carbon in soils: the use of benzenecarboxylic acids as specific markers
TL;DR: In this paper, a simple method using benzenepolycarboxylic acids (BPCA) as specific markers for black carbon was presented for the estimation of black carbon in soil samples.
Journal ArticleDOI
Direct molecular evidence for the degradation and mobility of black carbon in soils from ultrahigh-resolution mass spectral analysis of dissolved organic matter from a fire-impacted forest soil
TL;DR: The molecular composition of water-soluble products generated by the natural degradation of charcoal particles over a period of 100 years in a temperate forest soil has been investigated by ultra-high resolution mass spectrometry with electrospray ionization as discussed by the authors.
Journal ArticleDOI
Evaluation of CuO oxidation parameters for determining the source and stage of lignin degradation in soil
Angelika Otto,Myrna J. Simpson +1 more
TL;DR: In this article, the composition of phenols and other aromatic compounds in organic and mineral soil horizons and their respective source vegetation from different climatic zones of the Canadian Prairies were analyzed using gas chromatography-mass spectrometry (GC-MS) to investigate the stage of lignin degradation.
Journal ArticleDOI
Identification of black carbon derived structures in a volcanic ash soil humic acid by Fourier transform ion cyclotron resonance mass spectrometry.
TL;DR: The bulk of the sample analyzed is comprised of heavily carboxylated, hydrogen-deficient, condensed aromatic structures, features believed to be characteristic of black carbon-like material.
References
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Journal ArticleDOI
Aromaticity of Humic Substances in Soils1
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Electron Spin Resonance Spectrometry of Humic Substances1
R. Riffaldi,M. Schnitzer +1 more
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Analytical Characteristics of Humic and Fulvic Acids Extracted from Tropical Volcanic Soils1
S. M. Griffith,M. Schnitzer +1 more
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Oxidative degradation of humic and fulvic acids extracted from tropical volcanic soils
S. M. Griffith,M. Schnitzer +1 more
TL;DR: In this paper, humic and fulvic acids were extracted with 0.5 N NaOH under N2 from four surface and two subsurface horizons of four such soils from the island of Dominica and degraded by KMnO4 oxidation of unmethylated and methylated materials.