| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403363 |
| ISSN: | 0103-9733 |
| Authors: | Cogo, S.L1 Brinatti, A.M1 Saab, S.C1 Simoes, M.L2 Martin-Neto, L2 Rosa, J.A3 Mascarenhas, Y.P4 |
| Institutions: | 1Universidade Estadual de Ponta Grossa, Departamento de Fisica, Ponta Grossa, Parana. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Sao Carlos, Sao Paulo. Brasil 3Instituto Agronomico do Parana, Unidade Regional de Pesquisa Centro-Sul, Ponta Grossa, Parana. Brasil 4Universidade de Sao Paulo, Instituto de Fisica de Sao Carlos, Sao Carlos, Sao Paulo. Brasil |
| Year: | 2009 |
| Season: | Mar |
| Volumen: | 39 |
| Number: | 1 |
| Pages: | 31-34 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | In this study, sedimentary organic matter of oil shale rejects, calschist, shale fine and the so called retorted shale from Irati formation was characterized. EPR was used to analyse the samples regarding loss of signal in g = 2.003 associated to the organic free radical with the calcined samples and washing with hydrogen peroxide. The radical signal was detected in all samples, however, for the calschist and shale fine samples another signal was identified at g = 2.000 which disappeared when the sample was heated at 400 0C. Hydrogen peroxide washing was also performed and it was noted that after washing the signal appeared around g = 2.000 for all samples, including retorted shale, which might be due to the quartz E1 defect |
| Disciplines: | Física y astronomía, Geociencias |
| Keyword: | Física, Geología, Formación Irati, Lutita bituminosa, Resonancia paramagnética electrónica, Materia orgánica |
| Keyword: | Physics and astronomy, Earth sciences, Physics, Geology, Irati formation, Oil shale, Electron paramagnetic resonance, Organic matter |
| Full text: | Texto completo (Ver PDF) |
