| Texto completo | |
| Autor(es): |
Ribeiro, Joao Gabriel
;
Raimondi, Rizia Maria
;
de Souza, Alana Gabrieli
;
Rosa, Derval dos Santos
;
Paulino, Alexandre Tadeu
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF WATER PROCESS ENGINEERING; v. 69, p. 13-pg., 2025-01-01. |
| Resumo | |
The aim of this study was to investigate the synthesis, characterization, and sorption performance of ecofriendly pectin-co-montmorillonite composite hydrogels for the separation of potentially toxic elements (PTEs) from water. Hydrogels were synthesized using an environmentally friendly method, incorporating montmorillonite (MMT) at proportions ranging from 0 to 10 % in the tridimensional pectin (PC) network. The composite hydrogels were characterized by Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). Batch sorption studies were conducted to investigate the capacity to separate copper (Cu2+), nickel (Ni2+), manganese (Mn2+), zinc (Zn2+), cadmium (Cd2+), and hexavalent chromium (Cr6+) ions from water. Higher PTE separation efficiencies were found with hydrogels containing 1 % MMT, with greater selectivity for Cu2+ ions. An exhaustive sorption study revealed that the separation process of Cu2+ fits the pseudo-second-order kinetic model and Langmuir isotherm, with maximum sorption capacity (q(max)) of similar to 36.8 mg of hydrogel per g of PTE. This indicates that PC-co-MMT composite hydrogels are efficient alternative sorbents for the selective separation of PTEs from water, with potential application in ecofriendly water purification systems. (AU) | |
| 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 |
| 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: | 22/01382-3 - Hidrogéis de celulose contendo argilas modificadas para remoção e recuperação de íons metálicos presentes em águas contaminadas |
| Beneficiário: | Rafaela Reis Ferreira |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |