| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000435875 |
| ISSN: | 0001-3765 |
| Authors: | Silva, Teresa Cristina F1 Vergütz, Leonardus2 Pacheco, Anderson A2 Melo, Larissa F1 Renato, Natalia S2 Melo, Leonidas C.A3 |
| Institutions: | 1Universidade Estadual de Minas Gerais, Uba, Minas Gerais. Brasil 2Universidade Federal de Vicosa, Vicosa, Minas Gerais. Brasil 3Universidade Federal de Lavras, Lavras, Minas Gerais. Brasil |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 3 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Aplicado, descriptivo |
| English abstract | Activated biochars were prepared from residues of medium density fiberboard (MDF) produced by the furniture industry. Biomass residue was pre-treated with FeCl3 in two different FeCl3:biomass ratios (0.5:1 and 1:1, w/w) aiming to produce a matrix embedded with iron oxide. The pyrolysis process produced maghemite on the biochar surface and its magnetic properties were confirmed by its attraction to a hand magnet and its magnetic susceptibility. Samples were also characterized using scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS), surface area by BET-N2, Fourier transform infrared (FTIR), X-ray diffraction, magnetic susceptibility, and cation exchange capacity (CEC). Magnetic biochar exhibited up to twelve-fold higher surface area than the non-magnetic biochar, which varies according the maghemite particles content. Iron oxide on biochar surface also contributed for increasing CEC around ten-fold compared to non-magnetic biochars. Phosphorus adsorption isotherms showed that these magnetic biochars have high capacity to sorb oxyanions like phosphate, especially at lower pH. Thus, these magnetic biochars could be used to clean water bodies contaminated with oxyanions in acidic conditions |
| Disciplines: | Ingeniería |
| Keyword: | Ingeniería química, Tratamiento de aguas, Remoción de minerales, Fósforo, Biocarbón, Adsorción, Eutroficación, Isotermas |
| Keyword: | Chemical engineering, Water treatment, Mineral removal, Adsorption, Biochar, Eutrophication, Isotherms, Phosphorus |
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