Fixed bed biosorption of silver and investigation of functional groups on acidified biosorbent from algae biomass
Geovani Rocha de Freitas, Melissa Gurgel Adeodato Vieira, Meuris Gurgel Carlos da Silva
ARTIGO
Inglês
This work investigated the use of acidified dealginated residue from Sargassum filipendula algae for biosorption of silver in fixed bed column. This biosorbent was esterified for carboxyl and sulfonate groups to investigate the influence of these groups on silver removal percentage. Potentiometric...
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This work investigated the use of acidified dealginated residue from Sargassum filipendula algae for biosorption of silver in fixed bed column. This biosorbent was esterified for carboxyl and sulfonate groups to investigate the influence of these groups on silver removal percentage. Potentiometric titration was also evaluated on acidified and esterified biosorbents. Porosity and specific weight were determined by helium picnometry and mercury porosimetry techniques. The results showed that carboxyl and sulfonate groups were significant on silver biosorption. Potentiometric titration showed that esterified and acidified biosorbents presented different acid groups. The porosity of the acidified biosorbent was around 40%. Fixed bed assays were conducted to evaluate the influence of inlet concentration and feed flow rate of silver. Higher percentage removal of silver was obtained at 1.0 mmol center dot L-1 and 0.5 mL center dot min(-1). Modified dose-response model obtained the best prediction of experimental data among breakthrough curve models
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COORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES
FUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESP
2016/06173-2; 2017/18236-1
Fechado
Fixed bed biosorption of silver and investigation of functional groups on acidified biosorbent from algae biomass
Geovani Rocha de Freitas, Melissa Gurgel Adeodato Vieira, Meuris Gurgel Carlos da Silva
Fixed bed biosorption of silver and investigation of functional groups on acidified biosorbent from algae biomass
Geovani Rocha de Freitas, Melissa Gurgel Adeodato Vieira, Meuris Gurgel Carlos da Silva
Fontes
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Environmental science and pollution research Vol. 26, no. 36 (Dec., 2019), p. 36354-36366 |