Artificial and natural humic substances

Artificial and natural humic substances: Preparation, characterization, application

• Ammonoxidized ligneous materials (bulk harvest residues, technical lignins, peat, lignite) as artificial humic substances for re-cultivation of degraded soils
• Elucidation of the nitrogen bonding types in natural and artificial humic substances using partially labelled phenolic and quinoid model compounds
• Key intermediates of lignin ammonoxidation: Educts for preparation of nitrogenous oligo- and polymers.
• Nitrogenous moieties in humic matter and their impact on CO₂ sequestration in soils

Key publications:

1. Karapanagioti, H. K., Kalaitzidis, S., Vakros, I., Christanis, K., Liebner, F.: The effect of ammoniation on the geochemical properties of a lignite sample, Environmental Chemistry Letters.
2. Liebner, F., Fischer, K., Katzur, J., Böcker, L.: NOVIHUM™ - high-grade artificial humus and long-lasting fertilizer for accelerated rehabilitation of degraded areas. – In: The Loess Plateau in Central China: Ecological Restoration and Management. - ERSEC Ecological Book Series III, UNESCO office Beijing [Hrsg.], Tsinghua University Press und Springer Verlag Beijing 2006.
3. Katzur, J., Fischer, K., Böcker, L., Liebner, F., Schiene, R.: Kennwerte und Eigenschaften der auf Braunkohlenbasis durch oxidative Ammonolyse hergestellten Humusdüngestoffe. Arch.Acker-Pfl. Boden., 2002, Vol. 48, pp.637-646.