| Texto completo | |
| Autor(es): |
Barbosa, Rennan F. S.
;
Shyam, Sudip
;
Misra, Sirshendu
;
Mitra, Sushanta K.
;
Rosa, Derval S.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Applied Polymer Science; v. N/A, p. 15-pg., 2025-07-07. |
| Resumo | |
The presence of toxic metal ions in contaminated wastewater raises significant concerns for human health. Three-dimensional porous systems like hydrogels are being explored for contaminant removal. Still, there is a lack of understanding of their production parameters and performance. Therefore, the present work investigates the production parameters of chitosan hydrogels using the design of experiments methodology. Hydrogels were developed by solubilizing chitosan in acetic acid solution and cross-linked using glutaraldehyde, varying its proportions. The formulation containing 2% chitosan and 1% glutaraldehyde has water absorption superior to 300% and potential for metal removal, particularly copper and chromium. Crosslinking was validated by FTIR analysis, and the obtained hydrogel presented a highly porous structure. Kinetic studies showed a better fit to a pseudo-second order, and the Langmuir isotherm presented the best fit, showing sorption capacities of 0.422 and 1.143 mmol g-1 for copper and chromium, respectively. Filtration tests demonstrated that a 0.25 mL/min flow rate provided the best performance, with an initial fast removal that stabilizes. In addition, the weight and design used directly influence the adsorption properties. Results show that chitosan-based hydrogels can potentially remove metal contaminants. A filtering system is a feasible alternative for developing a low-cost, efficient, and environmentally friendly system. (AU) | |
| Processo FAPESP: | 21/08296-2 - Desenvolvimento de hidrogéis de quitosana contendo nanoestruturas de celulose modificada para remoção e recuperação de metais em águas contaminadas |
| Beneficiário: | Rennan Felix da Silva Barbosa |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 20/13703-3 - Materiais porosos ecológicos para a recuperação e reavaliação de metais recuperados de água contaminada |
| Beneficiário: | Derval dos Santos Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 21/14714-1 - EMU concedido no processo 2020/13703-3 (projeto temático): Cromatógrafo de Íons Modular 940 Professional IC Vario |
| Beneficiário: | Derval dos Santos Rosa |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa Equipamentos Multiusuários |