Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon
16 pages, 5 figures, 4 tables, 35 references.
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| Format: | artículo biblioteca |
| Language: | English |
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Elsevier
2000-12
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| Subjects: | Lignite, Particle size fractionation, Density fractionation, Magnetic susceptibility, 13C NMR, Radiocarbon dating, |
| Online Access: | http://hdl.handle.net/10261/82700 http://dx.doi.org/10.13039/501100001659 |
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dig-irnas-es-10261-827002018-09-12T11:50:34Z Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon Rumpel, C. Kögel-Knabner, I. Knicker, Heike Hüttl, R. F. German Research Foundation Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating 16 pages, 5 figures, 4 tables, 35 references. After open-cast mining operations in the eastern states of Germany, extremely acid overburden material with a high lignite content (up to 50 g OC/kg soil) is relocated and deposited at a spoil bank. For rehabilitation, these substrates are amended with alkaline ash from lignite-fired power stations and reforested with coniferous or broad-leaved trees. The aim of this study was to identify the allocation of lignite and recently formed humified compounds in soil compartments as separated by physical fractionation procedures. Samples were taken from the soil surface (0–5 cm, Ai horizon) and from the subsoil (1 m depth, Cv horizon) under red oak (Quercus rubra, age 36 years). Organic matter in bulk soils as well as in particle-size and density fractions was analysed for elemental composition, magnetic susceptibility, chemical structure by solid-state 13C CPMAS NMR spectroscopy and lignite content by 14C activity measurements. The contribution of lignin to the particle size fractions was estimated using CuO oxidation. In the bulk soil as well as in the physical fractions, carbon species related to lignite and carbon species related to plant litter occur in mixture. The 2000–630 μm fraction was found to be dominated by plant litter compounds whereas the 630–6.3 μm fractions consist mainly of aromatic and aliphatic carbon, most probably indicative of lignite and carbonaceous particles which were added to the Ai horizon during amelioration and airborne contamination with lignite combustion products. In the <2.0 μm fraction, CuO oxidation indicated that aromatic C compounds are derived from lignite rather than from recent plant lignin compounds. Physical fractionation with subsequent characterisation of the organic matter present in the fractions revealed that recently formed soil organic matter (SOM) consists mainly of partly altered plant residues rather than humic substances. The Deutsche Forschungsgemeinschaft is acknowledged for financial support. Peer reviewed 2013-09-24T15:51:36Z 2013-09-24T15:51:36Z 2000-12 artículo http://purl.org/coar/resource_type/c_6501 Geoderma 98 (3–4): 177–192 (2000) 0016-7061 http://hdl.handle.net/10261/82700 10.1016/S0016-7061(00)00060-4 1872-6259 http://dx.doi.org/10.13039/501100001659 en http://dx.doi.org/10.1016/S0016-7061(00)00060-4 none Elsevier |
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| topic |
Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating |
| spellingShingle |
Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating Rumpel, C. Kögel-Knabner, I. Knicker, Heike Hüttl, R. F. Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| description |
16 pages, 5 figures, 4 tables, 35 references. |
| author2 |
German Research Foundation |
| author_facet |
German Research Foundation Rumpel, C. Kögel-Knabner, I. Knicker, Heike Hüttl, R. F. |
| format |
artículo |
| topic_facet |
Lignite Particle size fractionation Density fractionation Magnetic susceptibility 13C NMR Radiocarbon dating |
| author |
Rumpel, C. Kögel-Knabner, I. Knicker, Heike Hüttl, R. F. |
| author_sort |
Rumpel, C. |
| title |
Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| title_short |
Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| title_full |
Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| title_fullStr |
Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| title_full_unstemmed |
Composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| title_sort |
composition and distribution of organic matter in physical fractions of a rehabilitated mine soil rich in lignite-derived carbon |
| publisher |
Elsevier |
| publishDate |
2000-12 |
| url |
http://hdl.handle.net/10261/82700 http://dx.doi.org/10.13039/501100001659 |
| work_keys_str_mv |
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