Data/hora: 23/06/2024 13:42:49

Biblioteca(s): | Embrapa Solos.
Data corrente: | 26/02/2014
Data da última atualização: | 04/11/2021
Autoria: | SANTOS, J. V. dos; MANGRICH, A. S.; PEREIRA, B. F.; PILLON, C. N.; NOVOTNY, E. H.; BONAGAMBA, T. J.; ABBT-BRAUNG, G.; FRIMMEL, F. H.
Afiliação: | ETELVINO HENRIQUE NOVOTNY, CNPS.
Título: | 13C NMR and EPR spectroscopic evaluation of oil shale mined soil recuperation.
Ano de publicação: | 2013
Fonte/Imprenta: | Journal of the Brazilian Chemical Society, v. 24, n. 2, p. 320-326, 2013.
DOI: | https://doi.org/10.5935/0103-5053.20130041
Idioma: | Inglês
Conteúdo: | In this work, native forest soil (NFS) organic matter (SOM) sample and SOM samples from a neighboring forest soil area of an oil shale mine which is being rehabilitated for thirty years (RFS) were analyzed. X-band electron paramagnetic resonance (EPR) and solid-state 13C nuclear magnetic resonance (NMR) spectroscopies were used to evaluate the soil reclamation of the Brazilian oil shale mining process. Two-dimensional heterospectral correlation studies of the results obtained from EPR and 13C NMR were used to obtain information about SOM structures and their interactions with residual paramagnetic metal ion. The signal of the residual metallic oxycation, VO2+ correlated positively with uronic acid-type hydrophilic organic structures, determined from the 13C NMR spectra, and correlated negatively with the organic free radical (OFR) signal associated with oxygen atoms (g = 2.0042). The hydrophobic aromatic structures correlate positively with the EPR OFR signal associated with carbon atoms (g = 2.0022). The data from the two spectroscopic magnetic techniques show that the used recuperation process is effective.
Palavras-Chave: | 13C NMR spectroscopy; 2D hetero-spectral correlation spectroscopy; Study of mining soil recuperation.
Thesaurus Nal: | soil organic matter.
Categoria do assunto: | P Recursos Naturais, Ciências Ambientais e da Terra
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/98326/1/13C-NMR-and-EPR-Spectroscopic-Evaluation-of-Oil-Shale-Mined-Soil-Recuperation.pdf
Registro original: | Embrapa Solos (CNPS)
Exemplares: | CNPS - (18045-1) - UPC - AP - DD -  -  - 2014.00160 - DIS