Structure and properties of Brazilian peat: Analysis by spectroscopy and microscopy

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorRomão, Luciane P. C.
dc.creatorLead, Jamie R.
dc.creatorRocha, Julio C.
dc.creatorDe Oliveira, Luciana Camargo
dc.creatorRosa, André H.
dc.creatorMendonça, André G. R.
dc.creatorRibeiro, Adauto de Souza
dc.date2014-05-27T11:22:35Z
dc.date2016-10-25T18:24:18Z
dc.date2014-05-27T11:22:35Z
dc.date2016-10-25T18:24:18Z
dc.date2007-09-06
dc.date.accessioned2017-04-06T01:26:30Z
dc.date.available2017-04-06T01:26:30Z
dc.identifierJournal of the Brazilian Chemical Society, v. 18, n. 4, p. 714-720, 2007.
dc.identifier0103-5053
dc.identifier1678-4790
dc.identifierhttp://hdl.handle.net/11449/69879
dc.identifierhttp://acervodigital.unesp.br/handle/11449/69879
dc.identifier10.1590/S0103-50532007000400008
dc.identifierS0103-50532007000400008
dc.identifierWOS:000249204300008
dc.identifier2-s2.0-34548294913.pdf
dc.identifier2-s2.0-34548294913
dc.identifier0000-0002-2042-018X
dc.identifierhttp://dx.doi.org/10.1590/S0103-50532007000400008
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/891056
dc.descriptionPeat was taken from the Sergipe State, Brazil and characterized by several techniques: elemental and thermal analyses; Fourier infrared (FTIR) and solid state 13C nuclear magnetic resonance (NMR) spectroscopies; scanning electron microscopy (SEM), environmental scanning electron microscopy (ESEM) and X-ray diffractometry (XRD). Also, the Sergipe State peat samples were compared with other peat sample from later from Sao Paulo State, Brazil. The lowest O/C and E 4/E 6 ratios and differential thermal analysis (DTA) curves of the Santo Amaro (SAO) sample indicated that this sample had the highest degree of decomposition. FTIR results showed that Itabaiana (ITA) and São Paulo (SAP) samples presented more prominent peak at 1086 cm -1 attributed the presence of Si-O than SAO sample spectra. The SAO sample showed two more intense peaks at 2920 cm -1 and 2850 cm -1. These results were corroborated by 13C NMR and thermal gravimetric (TG) where the relative abundance of the alkyl-C groups was greater in the SAO sample. The X-ray diffractometry (XRD) of SAO sample is characteristic of amorphous matter however, the SAP and ITA samples revealed the large presence of quartz mineral. The scanning electron microscopy (SEM) and environmental scanning electron microscopy (ESEM) showed that the surface of peat samples have porous granules of organic material. The ITA and SAP peat samples are alike while SAO peat sample is richer in organic material. Only the SAO sample has truthful characteristics of peat. The results of this study showed that the samples are very different due to variable inorganic and organic material contents. ©2007 Sociedade Brasileira de Química.
dc.languageeng
dc.relationJournal of the Brazilian Chemical Society
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectEnvironmental scanning electron microscopy
dc.subjectPeat structure and properties
dc.subjectScanning electron microscopy
dc.subjectSpectroscopy and microscopy characterization
dc.titleStructure and properties of Brazilian peat: Analysis by spectroscopy and microscopy
dc.typeOtro


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