Chelating properties of humic-like substances obtained from process water of hydrothermal carbonization

Autor: Vinícius Tadeu Vieira Campelo dos Santos Vieira Campelo dos Santos, Francisco Holanda Soares Junior, Odair Pastor Ferreira, Bernardo R. Moura, Jean L.S. Mounier, Maurício Boscolo, Marinônio Lopes Cornélio, Márcia Cristina Bisinoti, Altair Benedito Moreira, Houssam Hajjoul, Gustavo Metzker, Isabela C. Constantino
Přispěvatelé: Universidade Estadual Paulista (UNESP), Federal University of Ceará, Mediterranean Institute of Oceanography, Institut méditerranéen d'océanologie (MIO), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Toulon (UTLN)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Zdroj: Scopus
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Environmental Technology and Innovation
Environmental Technology and Innovation, 2021, 23, pp.101688. ⟨10.1016/j.eti.2021.101688⟩
ISSN: 2352-1864
Popis: Made available in DSpace on 2022-04-29T08:30:01Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-08-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico Recent studies have shown a new way of producing humic-like substances (HLS) from hydrochar prepared by hydrothermal carbonization of biomass. However, studies of HLS extracted from process water (PW) produced in hydrothermal carbonization process to the best of our knowledge are non-existent. In this work, hydrothermal carbonization of sugarcane bagasse and vinasse was performed under two concentrations of H2SO4 (1 and 4% w:w) followed of extraction of HLS from PW (HLS 1% and HLS 4%). The interaction of these compounds with Cu(II) ions revelated a complexation with high conditional stability constant (K ranged from 5.0 to 5.4) and high complexing capacity (CCc ranged from 3.1 to 3.9μmol mg−1). Elemental analysis and ash content showed that HLS 1% and HLS 4% both have high content of carbon, oxygen and inorganic compounds. In addition, the H/C molar ratio suggests that both HLS have aliphatic nature and O/C molar ratio acidic functional groups. FTIR analysis showed great variety of functional groups and also the presence of inorganic compounds. Excitation–Emission​ fluorescence matrices applied with complexation studies showed that interaction of HLS and Cu(II) occurs with two humic-like components. Data on Time Resolved Fluorescence Spectroscopy (TRFS) suggests that the mechanism of interaction between both HLS and Cu(II) occur by complexation. Furthermore, the infrared bidimensional analysis indicates that the binding sites for HLS 1% were in affinity order: COOCO > CH aliphatic, while for HLS 4% was: CH aliphatic > CO. Department of Chemistry and Environmental Sciences São Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences, São José do Rio Preto Department of Physics Federal University of Ceará, Fortaleza University of Toulon Aix Marseille Univ. CNRS/INSU IRD MIO UM 110 Mediterranean Institute of Oceanography Department of Physics São Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences (IBILCE), São José do Rio Preto Department of Chemistry and Environmental Sciences São Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences, São José do Rio Preto Department of Physics São Paulo State University (UNESP) Institute of Biosciences Humanities and Exact Sciences (IBILCE), São José do Rio Preto FAPESP: 2010/09998-6 FAPESP: 2017/13230-5 FAPESP: 2017/26718-6 FAPESP: 2018/05673-7 FAPESP: 2018/15733-7 FAPESP: 2019/18831-2 CNPq: 303377/2019-4 CNPq: 313637/2019-9 Fundação Cearense de Apoio ao Desenvolvimento Científico e Tecnológico: PR2-0101-00006.01.00/15
Databáze: OpenAIRE
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