| Texto completo | |
| Autor(es): |
Rodrigues, Maria Vitoria Raposo
;
Camparotto, Natalia Gabriele
;
De Albuquerque, Anjaina F.
;
Neves, Tauany de Figueiredo
;
Chernyayeva, Olga
;
Oliveira, Rafael L.
;
Prediger, Patricia
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING; v. 14, n. 1, p. 17-pg., 2026-02-01. |
| Resumo | |
Polymeric membranes containing adsorbent nanomaterials are a promising strategy for wastewater treatments, but few studies address chemical and morphological modifications in the polymer and related them to the performance of the membrane in real effluent treatment. In this study, for the first time, three-dimensional adsorbents were applied in the removal of heavy metals from a real electroplating wastewater. The prepared membranes were made from polyacrylonitrile (PAN) and mesoporous carbon doped with nitrogen and sulfur (NS-MPC). NS-MPC exhibited a three-dimensional porous structure with a high surface area (960.0 m2.g-1) and a pore volume of 3.43 cm3.g-1 The presence of NS-MPC in membranes resulted in the formation of irregular surfaces, increased porosity, square roughness (126 nm), and reduced hydrophilicity (12.05 degrees). SEM images revealed the expansion of the fibrillary porous sublayers, mainly for hPAN@NS-MPC-10. This membrane showed the highest porosity and the best adsorptive performance toward heavy metals. The hPAN@NS-MPC membrane was selective for the removal of Al, Cr, Cu, Fe, and Pb, to the detriment of Ni, Zn, and Mn ions, when the concentrated electroplating bath was treated. When the electroplating effluent was used, hPAN@NS-MPC was able to remove Al, Cr, Cu, Fe, Pb, Ni, Zn, and Mn, with removal percentage between 57.6 % and 93.8 %. The hPAN@NS-MPC-10 has a comparable removal capacity to other powdered adsorbents. The pseudo-second-order and the intraparticle diffusion kinetic models were found to be the most suitable, indicating that chemisorption governs the mechanism for copper uptake. The hPAN@NS-MPC-10 exhibited 85.5 % of removal for copper in filtration assays. (AU) | |
| Processo FAPESP: | 19/25228-0 - Desenvolvimento de novas membranas baseadas em óxido de grafeno para a remoção de contaminantes em água |
| Beneficiário: | Tauany de Figueiredo Neves |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| Processo FAPESP: | 23/02041-8 - Preparação de membranas poliméricas a base de MOF contendo nióbio por rotofiação e sua aplicação na remoção de contaminantes em água |
| Beneficiário: | Natália Gabriele Camparotto |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 22/14834-0 - Síntese de novos nanoadsorventes através de protocolos verdes e suas aplicações na remoção de poluentes em águas |
| Beneficiário: | Patricia Prediger |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |