Removal of the emerging contaminant bisphenol A by an ureasil-PEO hybrid membrane: experimental study and molecular dynamic simulation

Autor(es)

de Oliveira, Lilian K. ; Moura, Andre L. A. ; Barbosa, Valdir ; Parreira, Renato L. T. ; Banegas, Rodrigo S. ; Caramori, Giovanni F. ; Ciuffi, Katia J. ; Molina, Eduardo F.

• Tipo de documento: Artigo Científico
• Fonte: Environmental Science and Pollution Research; v. 24, n. 22, p. 18421-18433, AUG 2017.
• Citações Web of Science: 2

Resumo

This work reports the use of a cross-linked ureasil-PEO hybrid matrix (designated PEO800) as an efficient adsorbent to retain the emerging contaminant bisphenol A (BPA) from an aqueous medium. The in-deep experimental and theoretical results provide information about the interactions between PEO800 and BPA. The in situ UV-vis spectroscopy data and the pseudo-first order, pseudo-second order, Elovich, and Morris-Webber intraparticle diffusion models allowed us to propose a three-step mechanism for the adsorption of BPA onto PEO800. The results indicate that the pseudo-first-order kinetic model effectively describes the adsorption of BPA onto PEO800. Differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy confirmed the interaction of PEO800 with BPA, showing an alteration in the chemical environment of the polymer ether oxygen atoms present in the hybrid matrix. The molecular dynamic simulation provides further evidence that the BPA molecules interact preferentially with PEO. The amount of desorbed BPA depended on the pH and solvent used in the assays. This work provides new opportunities for using the hydrophilic ureasil-PEO matrix which has demonstrated its abilities in being a fast and easy alternative to successfully removing organic contaminants from aqueous mediums and therefore having potential applications in water remediation. (AU)

• Processo FAPESP: 16/01501-1 - Catalisadores multifuncionais para processos oxidativos avançados empregando matrizes biogênicas ou argilas
• Beneficiário: Katia Jorge Ciuffi Pires
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/20455-2 - Materiais híbridos orgânico-inorgânicos nano-estruturados para liberação controlada de lignanas com potencial farmacológico
• Beneficiário: Eduardo Ferreira Molina
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores