Cadmium binding mechanisms and adsorption capacity by novel phosphorus/magnesium-engineered biochars

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorPenido, Evanise Silva-
Autor(es): dc.creatorMelo, Leônidas Carrijo Azevedo-
Autor(es): dc.creatorGuilherme, Luiz Roberto Guimarães-
Autor(es): dc.creatorBianchi, Maria Lucia-
Data de aceite: dc.date.accessioned2026-02-09T11:10:00Z-
Data de disponibilização: dc.date.available2026-02-09T11:10:00Z-
Data de envio: dc.date.issued2020-04-29-
Data de envio: dc.date.issued2020-04-29-
Data de envio: dc.date.issued2019-06-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/40449-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0048969719314482-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1135147-
Descrição: dc.descriptionNovel phosphorus/magnesium-engineered biochars were prepared from poultry litter and tested for their Cd2+ retention capacity, unraveling the adsorption mechanisms. Batch experiments were conducted to evaluate the adsorption ability of Cd2+ by biochars and a wide range of characterization techniques were used: scanning electron microscopy with energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy, surface area and pore volume, and X-ray photoelectron spectroscopy. Results showed that, in general, Cd2+ removal did not drastically change with initial pH variation and was relatively fast (up to 3 h); the pseudo-second-order kinetic model provided slightly better fitting to the data. Cadmium adsorption capacities of the P/Mg-engineered biochars were much higher than that of the unmodified biochar (up to 113.9 mg g−1), following the SIPS isotherm model. The surfaces of the biochars contain a rich variety of oxygen-containing functional groups as well as phosphate groups. Since the specific surface areas of the biochars are considered low (up to 25.19 m2 g−1), surface groups contributed more to Cd2+ retention. Biochars can be represented by type II isotherms with significant type H3 hysteresis patterns, which suggest the presence of asymmetrically slit-shaped pores. Complexation and precipitation were the predominant adsorption mechanisms. Thus, P/Mg-engineered biochars produced from poultry litter are considered effective and eco-friendly adsorbents for Cd2+ removal from aqueous medium, especially PLB-H3PO4-MgO, which is produced from low-cost materials.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceScience of The Total Environment-
Palavras-chave: dc.subjectPoultry litter-
Palavras-chave: dc.subjectCo-pyrolysis-
Palavras-chave: dc.subjectContamination-
Palavras-chave: dc.subjectSurface functional groups-
Título: dc.titleCadmium binding mechanisms and adsorption capacity by novel phosphorus/magnesium-engineered biochars-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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