Fixed bed biosorption of silver and investigation of functional groups on acidified biosorbent from algae biomass

Autor(es)

de Freitas, Geovani Rocha ^[1] ; Adeodato Vieira, Melissa Gurgel ^[1] ; Carlos da Silva, Meuris Gurgel ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Sch Chem Engn, Dept Proc & Prod Design, BR-13083852 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 26, n. 36 NOV 2019.
• Citações Web of Science: 0

Resumo

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. (AU)

• Processo FAPESP: 17/18236-1 - Recuperação de íons metálicos nobres e íons terras-raras presentes em soluções aquosas por bioadsorção em partículas de blenda de sericina e alginato
• Beneficiário: Melissa Gurgel Adeodato Vieira
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/06173-2 - Remoção de íons prata e cobre por bioadsorção em resíduo da extração de alginato de alga marinha
• Beneficiário: Geovani Rocha de Freitas
• Modalidade de apoio: Bolsas no Brasil - Mestrado