Der chemische Aufbau der Braunkohlen

Marcusson, J.

doi:10.1002/ange.19270404004

Cited by 11 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Wahrend Grtin-und Strohdi.ingung sowie Emte-und Wurzelrtickstande rasch abgebaut werden und nur geringe Mengen stabiler Huminstoffe liefern, enthalten Stallmist und Kompost neben den mikrobiell leicht abbaubaren organischen Substanzen (Nahrhumus) auch geringe Mengen an Humifizierungsprodukten. Den weitaus gr613ten Anteil an Huminstoffen besitzen die Braunkohlen mit bis zu 98% der asche-und wasserfreien Substanz (Kopp 1960, Marcusson 1927Schlungbaum et al 1969). Ihr Einsatz a1s Bodenverbesserungs-bzw.…”

Section: Please Scroll Down For Articleunclassified

Pot and field experiments on the suitability of lignite as soil improving agent

Katzur

Fischer

Böcker

et al. 2002

Archives of Agronomy and Soil Science

View full text Add to dashboard Cite

In einem Gefal3-und Freilandversuch werden die Auswirkungen von chemisch unbehandelter Braunkohle (Kohlelliibe), mit NH 3 -Wasser versetzter Braunkohle (Ammonkohle) und kompostierter Braunkohle (Biomineraldiinger) auf Pflanzenertrag und ausgewiihlte Bodenfruchtbarkeitsmerkmale eines kolloidarmen und kohlehaltigen Kippbodens gepriift. Die Ergebnisse bestiitigen die in der Literatur wiedergegebenen Untersuchungsbefunde, wonach chemisch veriinderte, m it Stickstotf angereicherte Braunkohle Humusdiingestoffe sind, die das Wasser-und Niihrstoffspeicherungs-sowie -transformationsvermiigen der kolloidarmen Kippenbiiden nachhaltig beeinflussen. Die bodenverbessemden und ertragssteigemden Etfekte der Kohlediingung sind an bestimmte Bedingungen gekniipft. Stichw6rter: Braunkohle; Humusdiinuger; Kippenboden; Kohlediinger Pot and field experiments on the suitability of lignite as soil improving agentEffects of raw brown coal ("Kohletriibe"), brown coal modified with ammonia water, NH 3 , ("Ammonkohle") and composted brown coal ("Biomineraldiinger" ) on plant yield and on selected soil fertility characteristics of a colloidpoor and a coal-bearing dump soil are tested in a pot and field experiment. The results confirm already published results. Therefore chemical modified nitrogen enriched brown coal is a humus fertilizer the influence of which sustained the water and nutrient storing capacity as well as the nutrient transformation ability of colloid-poor dump soils. Soil improving and yield increasing effects of coal fertilisation depend on particular conditions.

show abstract

Section: Please Scroll Down For Articleunclassified

Pot and field experiments on the suitability of lignite as soil improving agent

Katzur

Fischer

Böcker

et al. 2002

Archives of Agronomy and Soil Science

View full text Add to dashboard Cite

show abstract

“…Vorteilhaft sind jene organischen Diingestoffe, aus denen die gr68te Menge an Dauerhumus (Huminsiiuren, Humine) hervorgeht oder die diesen bereits in groBen Mengenanteilen enthalten (Schr'6der et ai., 1987). Den weitaus gr6gten Anteil an Huminstoffen besitzen die Weichbraunkohlen mit bis zu 98% der asche-und wasserfreien Substanz (Kopp, 1960;Marcusson, 1927). Aufgrund dessen k6nnen sie wie die kohligen Beimengungen terti~irer Sedimente Humusersatzfunktionen iibemehmen (Katzur et aL, 2002b).…”

unclassified

Kennwerte und Eigenschaften der auf Braunkohlenbasis durch oxidative Ammonolyse hergestellten Humusdüngestoffe

Katzur

Fischer

Böcker

et al. 2002

Archives of Agronomy and Soil Science

View full text Add to dashboard Cite

Der auf Braunkohlenbasis dutch oxidative Ammonotyse hergestellte Humusdiingestoff wird anhand seiner Standardparameter, Elementgehatte und chemischen Eigenschaften beschrieben. Hiemach ist die N-modifizierte Braunkohle ein schadstoffarmes, N-reiches, dauerhumus~ihnliches Bodenverbessemngsmittel, das als Granulat sehr lagerungsbest~ndig ist. Der neue Humusd0ngestoff enth~itt stabil 5,78 + 0,38% Gesamtstickstoff, der chemisch unterschiedlich gebunden ist. Aufgrund seiner vergleichsweise geringen Nmi,-Gehalte kann er in grGgeren Mengen zur nachhaltigen Verbesserung der KAKpo t und Nt-Bodenvorr~ite humusfreier und kolloidarmer KippenbGden eingesetzt werden.The humus fertilizer produced on the base of brown coal is characterized by element contents and chemical parameters as standards. N-modified brown coal is poor in noxious substances and rich by Nitrogen. This humus fertilizer has a granulate structure and is very stabil in storage for longer time. The granular humus fertilizer contents 5,78 + 0,38% total nitrogen bound in different kind. It is possible to apply this fertilizer in large quantities because of the low minimal content of nitrogen. The N-modified brown coal as an new humus fertilizer is suited for a sustainable amelioration of humus and colloid deficient dump soils.

show abstract

“…According to their behaviour with aqueous alkali, humic substances are now usually classified as humic acids and humins; the former are easily soluble in cold aqueous alkali, whilst the latter dissolve only on heating. The different alkali solubility of the humins has been interpreted by Marcusson [2] in the sense that these substances are dehydration products or anhydrides of humic acid. The decrease in the solubility in aqueous ammonia which occurswhen the acids are dried at 105" C. has been ascribed to an alteration in the colloidal state, rather than to anhydride formation.…”

mentioning

confidence: 99%

An X‐ray Diffraction Study of Humification

Riley¹

1950

Journal of Soil Science

View full text Add to dashboard Cite

HUMIFICATION is the first stage of a slow process whereby vegetable debris is converted into peat, coal, anthracite, and finally into macrocrystalline raphite. The vegetable debris contains initially a diversity humus, which represents a ve early stage of humification, must also consist of a complex mixture o 7 chemical compounds. Since, however, the end-point of humification and coalification is a single chemical entity, viz. macrocrystalline graphite (certain meta-anthracites X-ray powder photographs which show a well-developed grap ite pattern), then it appears reasonable to suppose that during these changes there is a tendency towards the formation of chemical structures which become more and more alike as the slow process progresses: although intermediate stages may show a range of chemical composition, their classification together as humic acids and humins is justifiable on the grounds of certain specific characteristics and also is not contrary to the ideas of modem crystal chemistry. Waksman has pointed out that most of the investigations into the chemical properties of humus have been carried out on materials obtained from either peat or coals and, therefore, the results obtained should not be applied indiscriminate1 to the humus obtained from soils. Artificial humic acids can be prepare d by a variety of methods, and although the products show a certain similarity to those from natural sources, there is no proof of close physical and chemical similarity. According to their behaviour with aqueous alkali, humic substances are now usually classified as humic acids and humins; the former are easily soluble in cold aqueous alkali, whilst the latter dissolve only on heating. The different alkali solubility of the humins has been interpreted by Marcusson [2] in the sense that these substances are dehydration products or anhydrides of humic acid. The decrease in the solubility in aqueous ammonia which occurswhen the acids are dried at 105" C. has been ascribed to an alteration in the colloidal state, rather than to anhydride formation. The composition of humic acids obtained from peat and brown coal is not as constant as that of a well-defined chemical compound, but in many cases it a proximates to the empirical formula C,H,O,. In an investigation of of their degree of humification: it increases with the extent of the transformation of the original vegetable matter into humic substances and subsequently decreases radually with the process of coalification. Phenolic of the brown coals, and the proportion ecreases gradually duringthe humification process : they are still present in significant amounts in coals of rank intermediate between brown coals and bituminous coals. Ubaldini suggested the following approximate formula for humic acid : of chemica 7 compounds, and as Waksman [I] has pointed out, soil r y e Ita P ian brown coals Ubaldini [3] found that carboxyl acidity is a function B groups, on the other K and, are already resent in the parent organic matter /(COOH), ' ( W 2 C78H5205-(0H)7Journal of Soil Sci...

show abstract

Der chemische Aufbau der Braunkohlen

Cited by 11 publications

References 0 publications

Pot and field experiments on the suitability of lignite as soil improving agent

Pot and field experiments on the suitability of lignite as soil improving agent

Kennwerte und Eigenschaften der auf Braunkohlenbasis durch oxidative Ammonolyse hergestellten Humusdüngestoffe

An X‐ray Diffraction Study of Humification

Contact Info

Product

Resources

About