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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dc.contributor.authorSantos, Joao Vitor dos [UNESP]
dc.contributor.authorFregolente, Lais Gomes [UNESP]
dc.contributor.authorMoreira, Altair Benedito [UNESP]
dc.contributor.authorFerreira, Odair Pastor
dc.contributor.authorMounier, Stephane
dc.contributor.authorViguier, Bruno
dc.contributor.authorHajjoul, Houssam
dc.contributor.authorBisinoti, Marcia Cristina [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Ceara
dc.contributor.institutionUniv Toulon & Var
dc.date.accessioned2020-12-10T20:00:14Z
dc.date.available2020-12-10T20:00:14Z
dc.date.issued2020-06-20
dc.description.abstractHumic 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.en
dc.description.affiliationUniv 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
dc.description.affiliationUniv Fed Ceara, Lab Mat Funcionais Avancados LaMFA, Dept Fis, BR-60455900 Fortaleza, Ceara, Brazil
dc.description.affiliationUniv Toulon & Var, Lab MIO Equipe CEM, CS 60584, F-83041 Toulon 9, France
dc.description.affiliationUnespUniv 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
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCearense Foundation of Scientific and Technological Support (FUNCAP)
dc.description.sponsorshipIdFAPESP: 15/22954-1
dc.description.sponsorshipIdFAPESP: 17/26718-6
dc.description.sponsorshipIdFAPESP: 18/15733-7
dc.description.sponsorshipIdFAPESP: 17/05408-9
dc.description.sponsorshipIdFAPESP: 18/09914-9
dc.description.sponsorshipIdCearense Foundation of Scientific and Technological Support (FUNCAP): PRONEX PR20101-00006.01.00/15
dc.description.sponsorshipId: 2017/13230-5
dc.format.extent10
dc.identifierhttp://dx.doi.org/10.1016/j.scitotenv.2020.137815
dc.identifier.citationScience Of The Total Environment. Amsterdam: Elsevier, v. 722, 10 p., 2020.
dc.identifier.doi10.1016/j.scitotenv.2020.137815
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/11449/196913
dc.identifier.wosWOS:000535472600009
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofScience Of The Total Environment
dc.sourceWeb of Science
dc.subjectHydrothermal carbonization
dc.subjectAnthropogenic soils
dc.subjectComplexation
dc.subjectFluorescence lifetime
dc.subjectSoil remediation
dc.titleHumic-like acids from hydrochars: Study of the metal complexation properties compared with humic acids from anthropogenic soils using PARAFAC and time-resolved fluorescenceen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.orcid0000-0001-8274-5222[4]

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