Environmental-friendly calcium ferrites were prepared by using different Ca:Fe molar ratios, different calcination temperatures as well as different synthesis processes. Colloidal, structural, and optical properties were consistent across samples from both synthesis methods. Materials obtained via sol-gel combustion method (SC) calcined under 600°C exhibit Ms values ranging from 10 to 40 Am² kgFe₃O₄⁻¹.Additionally, low Hc and Mr values were found indicating superparamagnetic nanoclusters. They exhibited higher surface areas than thermal degraded samples (TD), ranging from 20 to 170 m²/g. Samples obtained via both method showed high photocatalytic capacities against dyes, with maximum values of 343.2 mgdye gsample-1 for MB and 116.7 mgdye gsample-1 for MO. Also, phosphate adsorption capacities were excellent, ranging from 5 to 120 mgPO₄³⁻ mgsample -1, especially for TD samples. Lastly, many samples showed great heavy metal adsorption capacity with values for Cu2+ and Fe3+ that arrive at 10 mgM+ gsample-1 with a 100% removal.
Calcium ferrites: Innovative and Multifunctional Solutions for Wastewater Treatment / Vespignani, M., Araújo, M.H.P., Costa, A.L., Zanoni, I., Ortelli, S., Blosi, M., Artusi, C., Amadori., S.. - (2024). (Winter School on Contaminants of Emerging Concern (CECs) and Disinfection By-Products (DBPs): Occurrence, Impact and Elimination ).
Calcium ferrites: Innovative and Multifunctional Solutions for Wastewater Treatment
M. Vespignani;
2024-01-01
Abstract
Environmental-friendly calcium ferrites were prepared by using different Ca:Fe molar ratios, different calcination temperatures as well as different synthesis processes. Colloidal, structural, and optical properties were consistent across samples from both synthesis methods. Materials obtained via sol-gel combustion method (SC) calcined under 600°C exhibit Ms values ranging from 10 to 40 Am² kgFe₃O₄⁻¹.Additionally, low Hc and Mr values were found indicating superparamagnetic nanoclusters. They exhibited higher surface areas than thermal degraded samples (TD), ranging from 20 to 170 m²/g. Samples obtained via both method showed high photocatalytic capacities against dyes, with maximum values of 343.2 mgdye gsample-1 for MB and 116.7 mgdye gsample-1 for MO. Also, phosphate adsorption capacities were excellent, ranging from 5 to 120 mgPO₄³⁻ mgsample -1, especially for TD samples. Lastly, many samples showed great heavy metal adsorption capacity with values for Cu2+ and Fe3+ that arrive at 10 mgM+ gsample-1 with a 100% removal.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
