Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques

Detalhes bibliográficos
Autor(a) principal: Santos, Joao Vitor dos [UNESP]
Data de Publicação: 2020
Outros Autores: Fregolente, Lais Gomes [UNESP], Mounier, Stephane, Hajjoul, Houssam, Ferreira, Odair Pastor, Moreira, Altair Benedito [UNESP], Bisinoti, Marcia Cristina [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.ecoenv.2020.111173
http://hdl.handle.net/11449/209589
Resumo: Fulvic acids (FA) are one of the components of humic substances and play an important role in the interaction with metallic species and, consequently, the bioavailability, distribution and toxicity of metals. However, only a few studies have investigated these FA properties in specific environment, such as anthropogenic soils. Therefore, knowledge about FA molecular composition as well as the FA-metal interaction is essential to predict their behavior in the soil. For this reason, the aim of this study was to investigate the molecular composition of FA extracted from two sites in an anthropogenic soil (Terra Mulata), from the Amazon region, as well as their interactions with Cu(II) ions as a model. Results from C-13 NMR, infrared and elemental analysis showed that these FA are composed mostly by alkyl structures and oxygen-functional groups, e.g., hydroxyl, carbonyl and carboxyl. The interaction with Cu(II) ions was evaluated by fluorescence quenching, in which the FA showed both high quantity of complexing sites per gram of carbon and good affinity to interact with the metal when compared with other soil FA. The results showed that the complexation capacity was highly correlated by the content of functional groups, while the binding affinity was largely influenced by structural factors. In addition, through the lifetime decay given by time-resolved fluorescence, it was concluded that static quenching took place in FA and Cu(II) interaction with the formation of a non-fluorescent ground-state complex. Therefore, this fraction of soil organic matter will fully participate in complexation reactions, thereby influencing the mobility and bioavailability of metal in soils. Hence, the importance of the study, and the role of FA in the environment, can be seen especially in the Amazon, which is one of the most important biomes in the world.
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spelling Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniquesTerra mulata soilsHumic substancesMetal complexationPARAFACLifetimeFulvic acids (FA) are one of the components of humic substances and play an important role in the interaction with metallic species and, consequently, the bioavailability, distribution and toxicity of metals. However, only a few studies have investigated these FA properties in specific environment, such as anthropogenic soils. Therefore, knowledge about FA molecular composition as well as the FA-metal interaction is essential to predict their behavior in the soil. For this reason, the aim of this study was to investigate the molecular composition of FA extracted from two sites in an anthropogenic soil (Terra Mulata), from the Amazon region, as well as their interactions with Cu(II) ions as a model. Results from C-13 NMR, infrared and elemental analysis showed that these FA are composed mostly by alkyl structures and oxygen-functional groups, e.g., hydroxyl, carbonyl and carboxyl. The interaction with Cu(II) ions was evaluated by fluorescence quenching, in which the FA showed both high quantity of complexing sites per gram of carbon and good affinity to interact with the metal when compared with other soil FA. The results showed that the complexation capacity was highly correlated by the content of functional groups, while the binding affinity was largely influenced by structural factors. In addition, through the lifetime decay given by time-resolved fluorescence, it was concluded that static quenching took place in FA and Cu(II) interaction with the formation of a non-fluorescent ground-state complex. Therefore, this fraction of soil organic matter will fully participate in complexation reactions, thereby influencing the mobility and bioavailability of metal in soils. Hence, the importance of the study, and the role of FA in the environment, can be seen especially in the Amazon, which is one of the most important biomes in the world.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundacao Cearense de Apoio ao Desenvolvimento Cientffico e TecnolOgico (FUNCAP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Lab Estudos Ciencias Ambientais, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilUniv Toulon & Var, Aix Marseille Univ, CNRS INSU, IRD,MIO UM 110,Mediterranean Inst Oceanog, CS 60584, F-83041 Toulon, FranceUniv Fed Ceara, Dept Fis, Lab Mat Funcionais Avancados, BR-60455900 Fortaleza, Ceara, BrazilUniv Estadual Paulista, Inst Biociencias Letras & Ciencias Exatas, Dept Quim & Ciencias Ambientais, Lab Estudos Ciencias Ambientais, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, BrazilFAPESP: 15/22954-1FAPESP: 17/26718-6FAPESP: 18/15733-7FAPESP: 17/05408-9FAPESP: 18/09914-9FAPESP: 2017/13230-5Fundacao Cearense de Apoio ao Desenvolvimento Cientffico e TecnolOgico (FUNCAP): PRONEX PR2-0101-00006.01.00/15CNPq: 313637/2019-9 (CNPq DT 29/2019)CNPq: 303377/2019-4 (CNPq PQ 06/2019)Elsevier B.V.Universidade Estadual Paulista (Unesp)Univ Toulon & VarUniv Fed CearaSantos, Joao Vitor dos [UNESP]Fregolente, Lais Gomes [UNESP]Mounier, StephaneHajjoul, HoussamFerreira, Odair PastorMoreira, Altair Benedito [UNESP]Bisinoti, Marcia Cristina [UNESP]2021-06-25T12:23:12Z2021-06-25T12:23:12Z2020-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8http://dx.doi.org/10.1016/j.ecoenv.2020.111173Ecotoxicology And Environmental Safety. San Diego: Academic Press Inc Elsevier Science, v. 205, 8 p., 2020.0147-6513http://hdl.handle.net/11449/20958910.1016/j.ecoenv.2020.111173WOS:000582219300046Web of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengEcotoxicology And Environmental Safetyinfo:eu-repo/semantics/openAccess2021-10-23T19:28:16Zoai:repositorio.unesp.br:11449/209589Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T13:50:47.752017Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
title Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
spellingShingle Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
Santos, Joao Vitor dos [UNESP]
Terra mulata soils
Humic substances
Metal complexation
PARAFAC
Lifetime
title_short Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
title_full Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
title_fullStr Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
title_full_unstemmed Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
title_sort Fulvic acids from Amazonian anthropogenic soils: Insight into the molecular composition and copper binding properties using fluorescence techniques
author Santos, Joao Vitor dos [UNESP]
author_facet Santos, Joao Vitor dos [UNESP]
Fregolente, Lais Gomes [UNESP]
Mounier, Stephane
Hajjoul, Houssam
Ferreira, Odair Pastor
Moreira, Altair Benedito [UNESP]
Bisinoti, Marcia Cristina [UNESP]
author_role author
author2 Fregolente, Lais Gomes [UNESP]
Mounier, Stephane
Hajjoul, Houssam
Ferreira, Odair Pastor
Moreira, Altair Benedito [UNESP]
Bisinoti, Marcia Cristina [UNESP]
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Univ Toulon & Var
Univ Fed Ceara
dc.contributor.author.fl_str_mv Santos, Joao Vitor dos [UNESP]
Fregolente, Lais Gomes [UNESP]
Mounier, Stephane
Hajjoul, Houssam
Ferreira, Odair Pastor
Moreira, Altair Benedito [UNESP]
Bisinoti, Marcia Cristina [UNESP]
dc.subject.por.fl_str_mv Terra mulata soils
Humic substances
Metal complexation
PARAFAC
Lifetime
topic Terra mulata soils
Humic substances
Metal complexation
PARAFAC
Lifetime
description Fulvic acids (FA) are one of the components of humic substances and play an important role in the interaction with metallic species and, consequently, the bioavailability, distribution and toxicity of metals. However, only a few studies have investigated these FA properties in specific environment, such as anthropogenic soils. Therefore, knowledge about FA molecular composition as well as the FA-metal interaction is essential to predict their behavior in the soil. For this reason, the aim of this study was to investigate the molecular composition of FA extracted from two sites in an anthropogenic soil (Terra Mulata), from the Amazon region, as well as their interactions with Cu(II) ions as a model. Results from C-13 NMR, infrared and elemental analysis showed that these FA are composed mostly by alkyl structures and oxygen-functional groups, e.g., hydroxyl, carbonyl and carboxyl. The interaction with Cu(II) ions was evaluated by fluorescence quenching, in which the FA showed both high quantity of complexing sites per gram of carbon and good affinity to interact with the metal when compared with other soil FA. The results showed that the complexation capacity was highly correlated by the content of functional groups, while the binding affinity was largely influenced by structural factors. In addition, through the lifetime decay given by time-resolved fluorescence, it was concluded that static quenching took place in FA and Cu(II) interaction with the formation of a non-fluorescent ground-state complex. Therefore, this fraction of soil organic matter will fully participate in complexation reactions, thereby influencing the mobility and bioavailability of metal in soils. Hence, the importance of the study, and the role of FA in the environment, can be seen especially in the Amazon, which is one of the most important biomes in the world.
publishDate 2020
dc.date.none.fl_str_mv 2020-12-01
2021-06-25T12:23:12Z
2021-06-25T12:23:12Z
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/10.1016/j.ecoenv.2020.111173
Ecotoxicology And Environmental Safety. San Diego: Academic Press Inc Elsevier Science, v. 205, 8 p., 2020.
0147-6513
http://hdl.handle.net/11449/209589
10.1016/j.ecoenv.2020.111173
WOS:000582219300046
url http://dx.doi.org/10.1016/j.ecoenv.2020.111173
http://hdl.handle.net/11449/209589
identifier_str_mv Ecotoxicology And Environmental Safety. San Diego: Academic Press Inc Elsevier Science, v. 205, 8 p., 2020.
0147-6513
10.1016/j.ecoenv.2020.111173
WOS:000582219300046
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ecotoxicology And Environmental Safety
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
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
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