Structural description of humic substances from subtropical coastal environments using elemental analysis, FT-IR and C-13-solid state NMR data

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dc.contributor.authorSierra, MMD
dc.contributor.authorGiovanela, M.
dc.contributor.authorParlanti, E.
dc.contributor.authorEsteves, VI
dc.contributor.authorDuarte, A. C.
dc.contributor.authorFransozo, A.
dc.contributor.authorSoriano-Sierra, E. J.
dc.contributor.institutionUniversidade Federal de Santa Catarina (UFSC)
dc.contributor.institutionUniv Caxias do Sul
dc.contributor.institutionUCS
dc.contributor.institutionUniv Bordeaux 1
dc.contributor.institutionUniv Aveiro
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T13:53:54Z
dc.date.available2014-05-20T13:53:54Z
dc.date.issued2005-03-01
dc.description.abstractElemental composition and spectroscopic properties (FT-IR and CP/MAS C-13-NMR) of sedimentary humic substances (HS) from aquatic subtropical environments (a lake, an estuary and two marine sites) are investigated. Humic acids (HA) are relatively richer in nitrogen and in aliphatic chains than fulvic acids (FA) from the same sediments. Conversely, FA are richer in carboxylic groups and in ring polysaccharides than HA. Nitrogen is mostly present as amide groups and for lake and marine HS the FT-IR peaks around 1640 cm(-1) and 1540 cm(-1) identify polypeptides. Estuarine HS exhibit mixed continental-marine influences, these being highly influenced by site location. Overall, the data suggest that aquatic and mixed HS are more aliphatic than has been proposed in current models and also that amide linkages form an important part of their structural configuration.en
dc.description.affiliationUniv Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil
dc.description.affiliationUniv Caxias do Sul, Ctr Tecnol, Caxias do Sul, Brazil
dc.description.affiliationUCS, CCET, DEFQ, BR-95070560 Caxias do Sul, RS, Brazil
dc.description.affiliationUniv Bordeaux 1, LPTC, CNRS, UMR 5472, F-33405 Talence, France
dc.description.affiliationUniv Aveiro, Dept Quim, P-3810193 Aveiro, Portugal
dc.description.affiliationUniv Estadual Paulista, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.description.affiliationUniv Fed Santa Catarina, NEMAR, BR-88040900 Florianopolis, SC, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Dept Zool, BR-18618000 Botucatu, SP, Brazil
dc.format.extent370-382
dc.identifierhttp://ria.ua.pt/handle/10773/6792
dc.identifier.citationJournal of Coastal Research. Lawrence: Coastal Education & Research Foundation, p. 370-382, 2005.
dc.identifier.issn0749-0208
dc.identifier.lattes4475960200256592
dc.identifier.orcid0000-0002-2067-5406
dc.identifier.urihttp://hdl.handle.net/11449/19265
dc.identifier.wosWOS:000230629600042
dc.language.isoeng
dc.publisherCoastal Education & Research Foundation
dc.relation.ispartofJournal of Coastal Research
dc.relation.ispartofjcr0.804
dc.relation.ispartofsjr0,383
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.subjecthumic acidspt
dc.subjectfulvic acidspt
dc.subjectinfrared spectroscopypt
dc.subjectlakept
dc.subjectcoastal marinept
dc.subjectestuarypt
dc.titleStructural description of humic substances from subtropical coastal environments using elemental analysis, FT-IR and C-13-solid state NMR dataen
dc.typeArtigo
dcterms.licensehttp://www.peertrack.net/JCR/JCR_Full_Author_Instructions.pdf
dcterms.rightsHolderCoastal Education & Research Foundation
unesp.author.lattes4475960200256592[6]
unesp.author.orcid0000-0002-2067-5406[6]
unesp.campusUniversidade Estadual Paulista (Unesp), Instituto de Biociências, Botucatupt

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