Organosulphur-modified biochar: An effective green adsorbent for removing metal species in aquatic systems

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Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Estadual de Campinas (UNICAMP)-
Autor(es): dc.creatorAlves Macedo, João Carlos [UNESP]-
Autor(es): dc.creatorSartori Jeunon Gontijo, Erik [UNESP]-
Autor(es): dc.creatorGómez Herrera, Santiago [UNESP]-
Autor(es): dc.creatorRangel, Elidiane Cipriano [UNESP]-
Autor(es): dc.creatorKomatsu, Daniel-
Autor(es): dc.creatorLanders, Richard-
Autor(es): dc.creatorRosa, André Henrique [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:52:46Z-
Data de disponibilização: dc.date.available2022-02-22T00:52:46Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.surfin.2020.100822-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/208225-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/208225-
Descrição: dc.descriptionOrganosulphur-modified biochar (BC) can be used as a green adsorbent for removing potentially toxic metal ions from aqueous solutions. In this study, sugarcane bagasse BCs (produced at pyrolysis temperatures from 300 to 700°C) were modified in a single-step reaction with isothiocyanate. The performance and selectivity of raw and modified BCs for removing Cd2+, Ni2+, Pb2+ and Cr3+ from mono- and multi-element aqueous solutions were investigated. The characterisation of the BCs was performed by proximate analysis, Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS) and pyrolysis coupled to gas chromatography-mass spectrometry (Py-GC-MS). The results showed that the organosulphur modification increased S and N contents on the surface of the BCs, particularly isothiocyanate groups. The maximal adsorptions were observed for raw and modified BCs produced at 700°C and pH 6. The adsorption kinetics of Cd2+, Ni2+, Pb2+ and Cr3+ before and after BC modification was best described by the pseudo-second order kinetic model. The results indicated that the removal of metal ions by modified-biochars follows the order Pb2+> Cr3+> Cd2+ ≅ Ni2+ and Cd2+> Pb2+> Ni2+≅Cr3+ for mono-element and multi-element systems, respectively. The mechanisms involved in the adsorption were physisorption, chemisorption, complexation, precipitation, and ion exchange. The presence of other metal ions in the multi-element system caused a synergistic effect on adsorption of Cr3+, Cd2+ and Ni2+ and an antagonistic effect on adsorption of Pb2+. Organosulphur-modified BC can be an effective andselective adsorbent for removing Cd2+, Ni2+, Pb2+ and Cr3+ from aqueous solutions.-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry Rua Prof. Francisco Degni, 55, Quitandinha - CEP 14800-060-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511, Alto da Boa Vista – CEP: 18087-180-
Descrição: dc.descriptionPontifical Catholic University of São Paulo (PUC SP) Campus Sorocaba, R. Joubert Wey, 290, Vila Boa Vista – CEP: 18030-070-
Descrição: dc.descriptionLaboratory of Surface Physics Department of Applied Physics “Gleb Wataghin” Institute of Physics University of Campinas, CEP 13083-859-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Chemistry Rua Prof. Francisco Degni, 55, Quitandinha - CEP 14800-060-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511, Alto da Boa Vista – CEP: 18087-180-
Idioma: dc.languageen-
Relação: dc.relationSurfaces and Interfaces-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectadsorption-
Palavras-chave: dc.subjectbiochar-
Palavras-chave: dc.subjectgreen adsorbent-
Palavras-chave: dc.subjectheavy metals-
Palavras-chave: dc.subjectwater treatment-
Título: dc.titleOrganosulphur-modified biochar: An effective green adsorbent for removing metal species in aquatic systems-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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