چكيده به لاتين
Environmental pollution is a critical issue that requires appropriate measures to maintain environmental health in a sustainable and effective manner. The increasing persistence of several active pharmaceutical ingredients, including antibiotics such as amoxicillin, and anti-inflammatory drugs such as levofloxacin in water matrices, is a global concern. In this context, the pathways of pharmaceutical waste into the environment are presented, through the entire life cycle of a pharmaceutical product. Microporous or mesoporous structures can be used to absorb and degrade these environmental pollutants and their degradation applications can be used. Microporous materials such as nanocomposites are used due to their low cost, high efficiency and greater reuse. In the work done, a metal oxide-modified nanocomposite containing carbon nitride graphite, chitosan, cerium oxide, silicon oxide, iron nitrate and nickel nitrate was used, which was obtained through a sonochemical method, an efficient photocatalyst. For this reason, in the present study, various conditions were investigated for the preparation of nanocomposites SiO2/CeO2/g-C3N4, SiO2/CeO2/Cs, SiO2/CeO2/PC, NiFe12O19/g-C3N4, NiFe12O19/Cs and NiFe12O19/Pc, such as: changing the molar ratio of precursors, changing the carbon base, changing the type of pollutant, changing the concentration of the pollutant, etc. The obtained photocatalyst has been used to absorb and destroy colored pollutants, including rhodamine B, reactive orange-5, and pharmaceutical pollutants such as amoxicillin and levofloxacin. Finally, by examining the results obtained from various analyses such as BET and ..... SiO2/CeO2/g-C3N4 and NiFe12O19/g-C3N4 photocatalysts have high degradation efficiency in 120 minutes under UV light. The degradation efficiency of SiO2/CeO2/g-C3N4 photocatalyst for Rhodamine B dye was 94%, for the drug amoxicillin 98% and for the drug levofloxacin 56.76%. Also, for the photocatalyst NiFe12O19/g-C3N4, the degradation efficiency of Reactive Orange-5 dye was 97%, for the drug amoxicillin 65% and for the drug levofloxacin 55%. By performing analyses such as infrared spectroscopy (FT-IR), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction pattern (XRD), porosimetry (BET), atomic force microscopy (AFM), transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM), thermal gravimetric analysis (TGA) and diffuse reflectance spectroscopy (DRS), acceptable results have been obtained from the synthesis and identification of this metal nanocomposite.
