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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Universidade de São Paulo (USP) | - |
Autor(es): dc.contributor | Universidade Estadual de Campinas (UNICAMP) | - |
Autor(es): dc.creator | Alves Macedo, João Carlos [UNESP] | - |
Autor(es): dc.creator | Sartori Jeunon Gontijo, Erik [UNESP] | - |
Autor(es): dc.creator | Gómez Herrera, Santiago [UNESP] | - |
Autor(es): dc.creator | Rangel, Elidiane Cipriano [UNESP] | - |
Autor(es): dc.creator | Komatsu, Daniel | - |
Autor(es): dc.creator | Landers, Richard | - |
Autor(es): dc.creator | Rosa, André Henrique [UNESP] | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:52:46Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:52:46Z | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2021-06-25 | - |
Data de envio: dc.date.issued | 2021-01-31 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.1016/j.surfin.2020.100822 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/208225 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/208225 | - |
Descrição: dc.description | Organosulphur-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.description | São Paulo State University (UNESP) Institute of Chemistry Rua Prof. Francisco Degni, 55, Quitandinha - CEP 14800-060 | - |
Descrição: dc.description | São Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511, Alto da Boa Vista – CEP: 18087-180 | - |
Descrição: dc.description | Pontifical Catholic University of São Paulo (PUC SP) Campus Sorocaba, R. Joubert Wey, 290, Vila Boa Vista – CEP: 18030-070 | - |
Descrição: dc.description | Laboratory of Surface Physics Department of Applied Physics “Gleb Wataghin” Institute of Physics University of Campinas, CEP 13083-859 | - |
Descrição: dc.description | São Paulo State University (UNESP) Institute of Chemistry Rua Prof. Francisco Degni, 55, Quitandinha - CEP 14800-060 | - |
Descrição: dc.description | São Paulo State University (UNESP) Institute of Science and Technology, Av. Três de Março, 511, Alto da Boa Vista – CEP: 18087-180 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Surfaces and Interfaces | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | adsorption | - |
Palavras-chave: dc.subject | biochar | - |
Palavras-chave: dc.subject | green adsorbent | - |
Palavras-chave: dc.subject | heavy metals | - |
Palavras-chave: dc.subject | water treatment | - |
Título: dc.title | Organosulphur-modified biochar: An effective green adsorbent for removing metal species in aquatic systems | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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