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- Title
HUMIC ACID REMOVAL FROM WATER BY SORPTION AND PHOTOCATALYSIS UNDER VIS IRRADIATION USING Fe<sub>2</sub>O<sub>3</sub>/SILICA NANOCOMPOSITE.
- Authors
Moțoc, Sorina; Ianasi, Cătălin; Baciu, Anamaria; Delcioiu, Claudia; Săcărescu, Liviu; Putz, Ana-Maria; Manea, Florica
- Abstract
Hematite/silica nanocomposite (α-Fe2O3/SiO2) was synthesized by sol-gel method at room temperature followed by thermal treatment through calcination at the temperature of 500o C selected based on thermo gravimetric analysis (TGA) and differential thermal analysis (DTA) results. The crystalline phases of α-Fe2O3 and SiO2 were characterized by the correlation of X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) results. The composite average particle size values ranged between 10 and 22 nm were estimated through XRD and transmission electron microscopy (TEM). The composite exhibited a high capacity to remove humic acids (HA) from water, through the sorption and VIS irradiation-assisted photocatalysis processes. The heterogeneous structure of the composite was found by corroborating Brunauer-Emmett-Teller (BET) results with the HA sorption physical mechanism determined by Dubinin-Radushkevich isotherm model. A synergic effect regarding visible irradiation-assisted photocatalysis process using α-Fe2O3/SiO2 was manifested for HA removal by comparison with the sorption and photolysis under VIS irradiation, which suggested a great potential for developing of a new nature-based inspired unitary processes for advanced treatment water for drinking purpose.
- Publication
Environmental Engineering & Management Journal (EEMJ), 2021, Vol 20, Issue 3, p335
- ISSN
1582-9596
- Publication type
Academic Journal