1. Caracterización espectroscópica de enmiendas orgánicas.
- Author
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J., Zambrano A., A., Contreras F., E., Paolini J., and C., Rivero
- Subjects
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HUMIC acid , *SPECTROSCOPIC imaging , *COMPOST & the environment , *ORGANIC wastes as soil amendments , *INFRARED spectra - Abstract
The structural characteristics of humic acids (hAs) depend mainly on the origin and the conditions in which these compounds are developed. There is a need to discern more accurately the structure and reactivity of HAs as well as the functional groups they contain. There are many analytical techniques that assess and allow the understanding of the complexity of these macromolecules. In this research, a--conjunction of--IR, ¹H-RMN, UV-Vis were used for the structural study of the has of a series of organic residues used and their relationship with each other at the Venezuelan Andes. The results of the E4/E 6 ratio indicated less polymerization on sludge, manure and ulA and Zea vermicompost, and more polymerized structures in sugar cane residues and cow manure. The infrared spectra of has were similar for all organic amendments studied, especial ly in specific bands to functional groups such as alcohols, amines, amides, carboxylic acids, ketonic groups and aliphatic and unsaturated and aromatic groups. The ¹H-RMN spectra hasn't provided further evidence about has structure. However, the presence of methylene aliphatic acid, alcohols and amides groups was confirmed. The presence of aromatic structures in some ahs was observed. These results corroborate the results obtained by ftIr. The results show differences on the chemical structures of the organic residues' humic acids linked to their chemical origin and stability. [ABSTRACT FROM AUTHOR]
- Published
- 2011