Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0103-50532009000600020 http://hdl.handle.net/11449/199 |
Resumo: | In this work humic substances (HS) extracted from non-flooded (Araca) and flooded (Iara) soils were characterized through the calculation of stability and activation energies associated with the dehydration and thermal decomposition of HS using TGA and DTA, electronic paramagnetic resonance and C/H, C/N and C/O atomic ratios. For HS extracted from flooded soils, there was evidence for the influence of humidity on the organic matter humification process. Observations of thermal behaviour, with elemental analysis, indicated the presence of fossilized organic carbon within clay particles, which only decomposed above 800 C. This characteristic could explain the different thermal stability and pyrolysis activation energies for Iara HS compared to Araca HS. |
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Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samplessoilshumic substanceskineticsthermal analysisAmazonIn this work humic substances (HS) extracted from non-flooded (Araca) and flooded (Iara) soils were characterized through the calculation of stability and activation energies associated with the dehydration and thermal decomposition of HS using TGA and DTA, electronic paramagnetic resonance and C/H, C/N and C/O atomic ratios. For HS extracted from flooded soils, there was evidence for the influence of humidity on the organic matter humification process. Observations of thermal behaviour, with elemental analysis, indicated the presence of fossilized organic carbon within clay particles, which only decomposed above 800 C. This characteristic could explain the different thermal stability and pyrolysis activation energies for Iara HS compared to Araca HS.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Inst Quim Araraquara, BR-14800900 Araraquara, SP, BrazilUniv Estadual Paulista, Dept Engn Ambiental, BR-18087180 Sorocaba, SP, BrazilUniversidade Federal de Alagoas (UFAL), BR-57309005 Arapiraca, AL, BrazilUniv Fed Sergipe, Dept Quim, BR-49100000 Sao Cristovao, SE, BrazilUniv Estadual Paulista, Inst Quim Araraquara, BR-14800900 Araraquara, SP, BrazilUniv Estadual Paulista, Dept Engn Ambiental, BR-18087180 Sorocaba, SP, BrazilSoc Brasileira QuimicaUniversidade Estadual Paulista (Unesp)Universidade Federal de Alagoas (UFAL)Universidade Federal de Sergipe (UFS)de Oliveira, Luciana Camargo [UNESP]Ribeiro, Clovis Augusto [UNESP]Rosa, Andre Henrique [UNESP]Botero, Wander Gustavo [UNESP]Rocha, Julio Cesar [UNESP]Cruz Romao, Luciane Pimentados Santos, Ademir [UNESP]2014-05-20T13:12:13Z2014-05-20T13:12:13Z2009-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1135-1141http://dx.doi.org/10.1590/S0103-50532009000600020Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 20, n. 6, p. 1135-1141, 2009.0103-5053http://hdl.handle.net/11449/19910.1590/S0103-50532009000600020S0103-50532009000600020WOS:000268336800020S0103-50532009000600020.pdf84983108918100820000-0002-7984-59080000-0002-2042-018XWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2022-03-05T02:14:13Zoai:repositorio.unesp.br:11449/199Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462022-03-05T02:14:13Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
title |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
spellingShingle |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples de Oliveira, Luciana Camargo [UNESP] soils humic substances kinetics thermal analysis Amazon |
title_short |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
title_full |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
title_fullStr |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
title_full_unstemmed |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
title_sort |
Thermal Decomposition Kinetics of Humic Substances Extracted from Mid-Rio Negro (Amazon Basin) Soil Samples |
author |
de Oliveira, Luciana Camargo [UNESP] |
author_facet |
de Oliveira, Luciana Camargo [UNESP] Ribeiro, Clovis Augusto [UNESP] Rosa, Andre Henrique [UNESP] Botero, Wander Gustavo [UNESP] Rocha, Julio Cesar [UNESP] Cruz Romao, Luciane Pimenta dos Santos, Ademir [UNESP] |
author_role |
author |
author2 |
Ribeiro, Clovis Augusto [UNESP] Rosa, Andre Henrique [UNESP] Botero, Wander Gustavo [UNESP] Rocha, Julio Cesar [UNESP] Cruz Romao, Luciane Pimenta dos Santos, Ademir [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Alagoas (UFAL) Universidade Federal de Sergipe (UFS) |
dc.contributor.author.fl_str_mv |
de Oliveira, Luciana Camargo [UNESP] Ribeiro, Clovis Augusto [UNESP] Rosa, Andre Henrique [UNESP] Botero, Wander Gustavo [UNESP] Rocha, Julio Cesar [UNESP] Cruz Romao, Luciane Pimenta dos Santos, Ademir [UNESP] |
dc.subject.por.fl_str_mv |
soils humic substances kinetics thermal analysis Amazon |
topic |
soils humic substances kinetics thermal analysis Amazon |
description |
In this work humic substances (HS) extracted from non-flooded (Araca) and flooded (Iara) soils were characterized through the calculation of stability and activation energies associated with the dehydration and thermal decomposition of HS using TGA and DTA, electronic paramagnetic resonance and C/H, C/N and C/O atomic ratios. For HS extracted from flooded soils, there was evidence for the influence of humidity on the organic matter humification process. Observations of thermal behaviour, with elemental analysis, indicated the presence of fossilized organic carbon within clay particles, which only decomposed above 800 C. This characteristic could explain the different thermal stability and pyrolysis activation energies for Iara HS compared to Araca HS. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-01-01 2014-05-20T13:12:13Z 2014-05-20T13:12:13Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0103-50532009000600020 Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 20, n. 6, p. 1135-1141, 2009. 0103-5053 http://hdl.handle.net/11449/199 10.1590/S0103-50532009000600020 S0103-50532009000600020 WOS:000268336800020 S0103-50532009000600020.pdf 8498310891810082 0000-0002-7984-5908 0000-0002-2042-018X |
url |
http://dx.doi.org/10.1590/S0103-50532009000600020 http://hdl.handle.net/11449/199 |
identifier_str_mv |
Journal of The Brazilian Chemical Society. São Paulo: Soc Brasileira Quimica, v. 20, n. 6, p. 1135-1141, 2009. 0103-5053 10.1590/S0103-50532009000600020 S0103-50532009000600020 WOS:000268336800020 S0103-50532009000600020.pdf 8498310891810082 0000-0002-7984-5908 0000-0002-2042-018X |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of the Brazilian Chemical Society 1.444 0,357 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1135-1141 |
dc.publisher.none.fl_str_mv |
Soc Brasileira Quimica |
publisher.none.fl_str_mv |
Soc Brasileira Quimica |
dc.source.none.fl_str_mv |
Web of Science reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1799965686734258176 |