Título:	Nb2 O5 Pellets with Inactive Biomass for Adsorption of Mn2+ Ions: Kinetic, Isothermal and Reuse Study.
Autoria:	GIRALDI, T. R. COSTA, B. C. da SILVA, M. M. SANTOS, A. L. dos PARIS, E. C. FIGUEIREDO, A. T. de RODRIGUEZ, R. P.
Afiliação:	ELAINE CRISTINA PARIS, CNPDIA.
Ano de publicação:	2023
Referência:	Materials Research, v. 26 (suppl. 1), e20220553, 2023.
Páginas:	9 p.
Conteúdo:	This paper aims to explore the production of porous Nb2 O5 pellets by pressing and adding anaerobic biomass (sludge) in order to evaluate the microstructure porosity. The thermal treatment temperature of the pellets varied between 300 ºC and 900 ºC. Their structural, morphological, and physical properties were measured, and the adsorption potential of Mn2+ and their reuse were evaluated. All samples had a monoclinic phase. Density average values of samples pressed using sludge ranged between 2.45 and 2.52 g.cm-3, while the one obtained without sludge pressing achieved higher values of around 2.72 g.cm-3. All samples presented high porosity values after the heat treatment (above 40%), which confirms the efficiency of sludge as a means to enhance porosity. These pellets were used for Mn2+ ions adsorption in aqueous medium. The Langmuir isotherm model was the one that achieved the best goodness-of-fit. In kinetic studies, the adsorption reaction was in accordance with second-order kinetics. Adsorbents in the form of pellets are environmentally friendly on account of their significant reuse and recycling potential. However, the particulate matter might become an environmental liability and incur high treatment costs. The samples proved to be reusable, promoting the adsorption of 67% of the Mn2+ after the fifth reuse cycle.
Palavras-chave:	Nb2 O5 Reuse Mn2+
Digital Object Identifier:	https://doi.org/10.1590/1980-5373-MR-2022-0553
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPDIA)