Humic-like acids from hydrochars: Study of the metal complexation properties compared with humic acids from anthropogenic soils using PARAFAC and time-resolved fluorescence

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniv Fed Ceara-
Autor(es): dc.contributorUniv Toulon & Var-
Autor(es): dc.creatorSantos, Joao Vitor dos [UNESP]-
Autor(es): dc.creatorFregolente, Lais Gomes [UNESP]-
Autor(es): dc.creatorMoreira, Altair Benedito [UNESP]-
Autor(es): dc.creatorFerreira, Odair Pastor-
Autor(es): dc.creatorMounier, Stephane-
Autor(es): dc.creatorViguier, Bruno-
Autor(es): dc.creatorHajjoul, Houssam-
Autor(es): dc.creatorBisinoti, Marcia Cristina [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:10:47Z-
Data de disponibilização: dc.date.available2022-02-22T00:10:47Z-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-12-09-
Data de envio: dc.date.issued2020-06-20-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.scitotenv.2020.137815-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/196913-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/196913-
Descrição: dc.descriptionHumic acids (HA) play an important role in the distribution, toxicity, and bioavailability of metals in the environment. Humic-like acids (HLA) that simulate geochemical processes can be prepared by NaOH aqueous extraction from hydrochars produced by hydrothermal carbonization (HTC). HLA can exhibit properties such as those found in HA from soils, which are known for their ability to interact with inorganic and organic compounds. The molecular characteristics of HLA and HA help to explain the relationship between their molecular features and their interaction with metallic species. The aim of this study is to assess the molecular features of HA extracted from Terra Mulata (TM) and HLA from hydrochars as well as their interaction with metals by using Cu(II) ions as a model. The results from C-13 NMR, elemental analysis, FTIR, and UV-Vis showed that HA are composed mostly of aromatic structures and oxygenated functional groups, whereas HLA showed a mutual contribution of aromatic and aliphatic structures as main constituents. The interactions of HA and HLA with Cu(II) ions were evaluated through fluorescence quenching, in which the density of complexing sites per gram of carbon for interaction was higher for HLA than for HA. Furthermore, the HLA showed similar values for stability constants, and higher than those found for other types of HA in the literature. In addition, the average lifetime in both humic extracts appeared to be independent of the copper addition, indicating that the main mechanism of interaction was static quenching with a non-fluorescent ground-state complex formation. Therefore, the HLA showed the ability to interact with Cu(II) ions, which suggests that their application can provide a new approach for remediation of contaminated areas. (C) 2020 Elsevier B.V. All rights reserved.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionCearense Foundation of Scientific and Technological Support (FUNCAP)-
Descrição: dc.descriptionUniv Estadual Paulista, Lab Estudos Ciencias Ambientais, Dept Quim & Ciencias Ambientais, Inst Biociencias Letras & Ciencias Exatas, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil-
Descrição: dc.descriptionUniv Fed Ceara, Lab Mat Funcionais Avancados LaMFA, Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil-
Descrição: dc.descriptionUniv Toulon & Var, Lab MIO Equipe CEM, CS 60584, F-83041 Toulon 9, France-
Descrição: dc.descriptionUniv Estadual Paulista, Lab Estudos Ciencias Ambientais, Dept Quim & Ciencias Ambientais, Inst Biociencias Letras & Ciencias Exatas, Rua Cristovao Colombo 2265, BR-15054000 Sao Jose Do Rio Preto, SP, Brazil-
Descrição: dc.descriptionFAPESP: 15/22954-1-
Descrição: dc.descriptionFAPESP: 17/26718-6-
Descrição: dc.descriptionFAPESP: 18/15733-7-
Descrição: dc.descriptionFAPESP: 17/05408-9-
Descrição: dc.descriptionFAPESP: 18/09914-9-
Descrição: dc.descriptionCearense Foundation of Scientific and Technological Support (FUNCAP): PRONEX PR20101-00006.01.00/15-
Descrição: dc.description: 2017/13230-5-
Formato: dc.format10-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier B.V.-
Relação: dc.relationScience Of The Total Environment-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectHydrothermal carbonization-
Palavras-chave: dc.subjectAnthropogenic soils-
Palavras-chave: dc.subjectComplexation-
Palavras-chave: dc.subjectFluorescence lifetime-
Palavras-chave: dc.subjectSoil remediation-
Título: dc.titleHumic-like acids from hydrochars: Study of the metal complexation properties compared with humic acids from anthropogenic soils using PARAFAC and time-resolved fluorescence-
Tipo de arquivo: dc.typelivro digital-
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