An ecofriendly pectin-co-montmorillonite composite hydrogel for the separation of contaminant metal ions from water

Autor(es)

Ribeiro, Joao Gabriel ; Raimondi, Rizia Maria ; de Souza, Alana Gabrieli ; Rosa, Derval dos Santos ; Paulino, Alexandre Tadeu

• 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