Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation

Detalhes bibliográficos
Autor(a) principal: Tadini, Amanda M. [UNESP]
Data de Publicação: 2014
Outros Autores: Moreira, Altair B. [UNESP], Bisinoti, Márcia C. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.5935/0103-5053.20130277
http://hdl.handle.net/11449/110001
Resumo: This study had as main objectiveto evaluate the influence of AHS obtained from an area under sugarcane cultivation on the dynamics of chromium species (Cr(III) and Cr(VI)). Was studied complexing capacity (CC) with the AHS of chromium species and these were characterized using UV/Vis spectrophotometry, molecular fluorescence, elemental analysis and infrared. AHS with and without fractionation showed a greater aromaticity degree and a predominance of humic acids, and the E4/E6 and E2/E4 ratios suggested aromatic rings and a greater contribution from plants, which indicates lignin structures. The highest CCs were observed for the AHS fractionated, being fraction with molecular-size < 10 kDa and 10-30 kDa showed the highest ability to complex Cr(III) and Cr(VI) ions, respectively. These results are corroborating with C/H/N and UV/Vis data, where we can conclude that the AHS without fractionation had the greatest aromaticity and a predominance of humic acids in their structure.
id UNSP_da64421eb47a80405a24cc545235024d
oai_identifier_str oai:repositorio.unesp.br:11449/110001
network_acronym_str UNSP
network_name_str Repositório Institucional da UNESP
repository_id_str 2946
spelling Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivationAquatic humic substancescomplexationCharacterizationThis study had as main objectiveto evaluate the influence of AHS obtained from an area under sugarcane cultivation on the dynamics of chromium species (Cr(III) and Cr(VI)). Was studied complexing capacity (CC) with the AHS of chromium species and these were characterized using UV/Vis spectrophotometry, molecular fluorescence, elemental analysis and infrared. AHS with and without fractionation showed a greater aromaticity degree and a predominance of humic acids, and the E4/E6 and E2/E4 ratios suggested aromatic rings and a greater contribution from plants, which indicates lignin structures. The highest CCs were observed for the AHS fractionated, being fraction with molecular-size < 10 kDa and 10-30 kDa showed the highest ability to complex Cr(III) and Cr(VI) ions, respectively. These results are corroborating with C/H/N and UV/Vis data, where we can conclude that the AHS without fractionation had the greatest aromaticity and a predominance of humic acids in their structure.Este estudo teve como objetivo principal avaliar a influência das SHA obtidas a partir de uma área de cultivo de cana de açúcar sobre a influência das espécies de crômio (Cr(III) e Cr(VI)). Foi estudada a capacidade de complexação (CC) das SHA com as espécies de crômio e estas foram caracterizadas por espectrofotometria de UV/Vis, fluorescência molecular, análise elementar e infravermelho. SHA com e sem fracionamento apresentou maior grau de aromaticidade e predominância de ácidos húmicos, e as razões E4/E6 e E2/E4 sugerem a presença de anéis aromáticos e maior contribuição das plantas e lignina. As maiores CC foram observados para a SHA fracionadas, sendo as frações com tamanho molecular < 10 kDa e 10-30 kDa as que apresentaram as maiores capacidades para complexar os íons Cr(III) e Cr(VI), respectivamente. Estes resultados corroboram com os dados de C/H/N e UV/Vis, permitindo concluir que as SHA sem fracionamento têm em sua estrutura maior grupos aromáticos e uma predominância de ácidos húmicos.Universidade Estadual Paulista Júlio de Mesquita Filho Instituto de Biociências, Letras e Ciências Exatas Departamento de Química e Ciências AmbientaisUniversidade Estadual Paulista Júlio de Mesquita Filho Instituto de Biociências, Letras e Ciências Exatas Departamento de Química e Ciências AmbientaisSociedade Brasileira de QuímicaUniversidade Estadual Paulista (Unesp)Tadini, Amanda M. [UNESP]Moreira, Altair B. [UNESP]Bisinoti, Márcia C. [UNESP]2014-10-01T13:08:44Z2014-10-01T13:08:44Z2014-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article119-125application/pdfhttp://dx.doi.org/10.5935/0103-5053.20130277Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 25, n. 1, p. 119-125, 2014.0103-5053http://hdl.handle.net/11449/11000110.5935/0103-5053.20130277S0103-50532014000100015WOS:000329899800015S0103-50532014000100015.pdf32644800445293803264480044529380SciELOreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of the Brazilian Chemical Society1.4440,357info:eu-repo/semantics/openAccess2023-11-03T06:11:01Zoai:repositorio.unesp.br:11449/110001Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:48:59.411325Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
title Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
spellingShingle Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
Tadini, Amanda M. [UNESP]
Aquatic humic substances
complexation
Characterization
title_short Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
title_full Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
title_fullStr Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
title_full_unstemmed Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
title_sort Fractionation of aquatic humic substances and dynamic of chromium species in an aquatic body influenced by sugarcane cultivation
author Tadini, Amanda M. [UNESP]
author_facet Tadini, Amanda M. [UNESP]
Moreira, Altair B. [UNESP]
Bisinoti, Márcia C. [UNESP]
author_role author
author2 Moreira, Altair B. [UNESP]
Bisinoti, Márcia C. [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Tadini, Amanda M. [UNESP]
Moreira, Altair B. [UNESP]
Bisinoti, Márcia C. [UNESP]
dc.subject.por.fl_str_mv Aquatic humic substances
complexation
Characterization
topic Aquatic humic substances
complexation
Characterization
description This study had as main objectiveto evaluate the influence of AHS obtained from an area under sugarcane cultivation on the dynamics of chromium species (Cr(III) and Cr(VI)). Was studied complexing capacity (CC) with the AHS of chromium species and these were characterized using UV/Vis spectrophotometry, molecular fluorescence, elemental analysis and infrared. AHS with and without fractionation showed a greater aromaticity degree and a predominance of humic acids, and the E4/E6 and E2/E4 ratios suggested aromatic rings and a greater contribution from plants, which indicates lignin structures. The highest CCs were observed for the AHS fractionated, being fraction with molecular-size < 10 kDa and 10-30 kDa showed the highest ability to complex Cr(III) and Cr(VI) ions, respectively. These results are corroborating with C/H/N and UV/Vis data, where we can conclude that the AHS without fractionation had the greatest aromaticity and a predominance of humic acids in their structure.
publishDate 2014
dc.date.none.fl_str_mv 2014-10-01T13:08:44Z
2014-10-01T13:08:44Z
2014-01-01
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/10.5935/0103-5053.20130277
Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 25, n. 1, p. 119-125, 2014.
0103-5053
http://hdl.handle.net/11449/110001
10.5935/0103-5053.20130277
S0103-50532014000100015
WOS:000329899800015
S0103-50532014000100015.pdf
3264480044529380
3264480044529380
url http://dx.doi.org/10.5935/0103-5053.20130277
http://hdl.handle.net/11449/110001
identifier_str_mv Journal of the Brazilian Chemical Society. Sociedade Brasileira de Química, v. 25, n. 1, p. 119-125, 2014.
0103-5053
10.5935/0103-5053.20130277
S0103-50532014000100015
WOS:000329899800015
S0103-50532014000100015.pdf
3264480044529380
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 119-125
application/pdf
dc.publisher.none.fl_str_mv Sociedade Brasileira de Química
publisher.none.fl_str_mv Sociedade Brasileira de Química
dc.source.none.fl_str_mv SciELO
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_ 1808128706289336320

Registros relacionados