| Texto completo | |
| Autor(es): |
Costa, Jose Arnaldo S.
;
Oliveira, Rhayza Victoria M.
;
Menezes, Thalles Henrique S.
;
Costa, Vinicius C.
;
Roma, Luciane P. C.
;
Paranhos, Caio Marcio
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Inorganic Chemistry Communications; v. 159, p. 10-pg., 2023-11-25. |
| Resumo | |
In the present study, the CoFe2O4@Fe3O4-based magnetic nanocomposite was synthesized and applied as an adsorbent material in the polycyclic aromatic hydrocarbons (PAHs) remediation, which include phenanthrene (Phe), benzo[b]fluoranthene (B[b]F), benzo[k]fluoranthene (B[k]F), and benzo[a]pyrene (B[a]P). The experimental conditions were investigated using a factorial experimental design (24) with the aim of carrying out a systematic evaluation of the solution pH, equilibrium time, concentration of pollutants, and magnetic nano composite mass. The characterization of the CoFe2O4@Fe3O4 adsorbent by the FTIR and XRD analyses showed success in the formation of magnetic nanoparticles. In addition, the SEM-EDS analysis exhibited images of nanometric spheres, uniform morphology, and the presence of Fe, Co and O as main components, as well as a type IV isotherms with H1 hysteresis as a typical formation of a mesoporous nanocomposite with high surface area (244.28 m(2) g(-1)) and large pore volume (0.19 cm(3) g(-1)). The statistical treatment revealed that the pH and the adsorption time are variables that little or nothing influenced the adsorptive properties of the CoFe2O4@-Fe3O4 to remove the PAHs mixture, contrary to the PAHs concentration and the CoFe2O4@Fe3O4 mass, which are important variables. Finally, the best experimental conditions were obtained for the adsorption tests between 13 (pH 3, time = 5 min, concentration = 1000 mu g L-1, and mass = 50 mg) and 16 (pH 10, time = 200 min, concentration = 1000 mu g L-1, and mass = 50 mg), whose overall desirability (OD) values were 1.00 and removal efficiency varied between 92.40 and 96.60 %; 95.00-97.00 %; 90.80-96.30 %; and 93.50-96.80 %, respectively, for Phe, B[b]F, B[k]F, and B[a]P. (AU) | |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |
| Processo FAPESP: | 17/06775-5 - Desenvolvimento de membranas poliméricas híbridas tunáveis na remediação de hidrocarbonetos policíclicos aromáticos (HPAs) oriundos do petróleo |
| Beneficiário: | José Arnaldo Santana Costa |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |
| Processo FAPESP: | 14/50945-4 - INCT 2014: Instituto Nacional de Tecnologias Alternativas para Detecção, Avaliação Toxicológica e Remoção de Micropoluentes e Radioativos |
| Beneficiário: | Maria Valnice Boldrin |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |