Green synthesis of an advanced composite membrane for the purification of water contaminated with potentially toxic metals

Autor(es)

Tischer, Ana Maria ; Ferreira, Rafaela Reis ; Ribeiro, Joao Gabriel ; Rosa, Derval dos Santos ; Paulino, Alexandre Tadeu

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF WATER PROCESS ENGINEERING; v. 61, p. 12-pg., 2024-04-13.

Resumo

Anthropogenic activities can lead to high contents of potentially toxic elements (PTEs) in soil and water. Thus, there is a worldwide need to find effective, environmentally friendly sorbents for remediating sites polluted with metals. In this study, we investigated how pectin/magnetite/pine sawdust (PE/Fe3O4 /P) membranes serve as sorbents for the removal of Cd(II), Cr(VI), Cu(II), Mn(II), Ni(II), and Zn(II) from aqueous media containing multiple metals. Fourier -transform infrared (FTIR) spectra confirmed the efficient formation of crosslinked membrane chains during the synthesis of the biomass material. Thermogravimetric (TG) and derivative thermogravimetric (DTG) curves revealed that the biopolymer matrix remains stable at low temperatures and begins to degrade at temperatures above 260 (degrees) C. Scanning electron microscopy (SEM) coupled to energy -dispersive Xray spectroscopy (EDS) demonstrated changes in the morphology of the biomembrane. Among the six PTEs tested, the PE/Fe3O4 /P5% membrane had the highest sorption capacity for Cu(II) (similar to 43 mg g (-1) ). The metal/membrane interaction was confirmed by FTIR, TG, DTG, SEM, and EDS after the sorption assays. The findings of this work indicate that green sorbents constitute a promising strategy for the remediation of aquatic environments contaminated with PTEs. (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: 23/04147-8 - Membranas de PBAT contendo nanoestruturas de celulose modificada para remoção e recuperação de íons metálicos em águas contaminadas
• Beneficiário: João Gabriel Ribeiro
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• 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