| Full text | |
| Author(s): |
de Freitas, Geovani Rocha
[1]
;
Adeodato Vieira, Melissa Gurgel
[1]
;
Carlos da Silva, Meuris Gurgel
[1]
Total Authors: 3
|
| Affiliation: | [1] Univ Estadual Campinas, Sch Chem Engn, Dept Proc & Prod Design, BR-13083852 Campinas, SP - Brazil
Total Affiliations: 1
|
| Document type: | Journal article |
| Source: | Environmental Science and Pollution Research; v. 26, n. 36 NOV 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
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) | |
| FAPESP's process: | 17/18236-1 - RECOVERY OF NOBLE METALLIC IONS AND RARE-EARTH IONS FROM AQUEOUS SOLUTIONS BY BIOADSORTION IN PARTICLES PRODUCED FROM SERICINE AND ALGINATE BLENDS |
| Grantee: | Melissa Gurgel Adeodato Vieira |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 16/06173-2 - Removal of silver and copper ions by biosorption residue of marine alginate extraction |
| Grantee: | Geovani Rocha de Freitas |
| Support Opportunities: | Scholarships in Brazil - Master |