چكيده
With the expansion of industrial and agricultural activities, the pollution of water sources has increased and has become one of the worrying issues of human societies. The presence of antibiotic traces in the water system due to inefficient treatment of pharmaceutical wastewater shows threats such as bioaccumulation and resistance to antibiotics. Lofloxacin and cefixime are two types of these antibiotics, respectively, levofloxacin is used to treat bacterial infections in many different parts of the body. It is also used to treat anthrax infection after inhalation exposure. Levofloxacin is also used to treat and prevent plague (including pneumonic plague and septicemia), and cefixime is used to treat bacterial infections in many different parts of the body. This drug belongs to the class of drugs known as cephalosporin antibiotics. It works by killing bacteria or preventing their growth. However, this medicine is not effective for colds, flu, or other viral infections. In order to maintain the health of human societies, methods are needed to control these toxins in water. Metal-organic frameworks (MOF) are a class of compounds consisting of metal ions or clusters that coordinate with organic ligands and create one, two, or three-dimensional structures, and are considered a new category of nano porous materials. They are a sub-class of coordination polymer, with this special feature that they are often porous. One of the prominent features of these compounds, which makes them widely used, is the presence of holes that cause porosity in the structure. Holes have different types that can be effective in determining the application of the material. "Specific volume" and "specific surface" can be mentioned from the quantities used in the comparison of material porosity. Organic metal frameworks have a very high design capability and this increases the desire to work with them. The existing order and rule in metal-organic frameworks increases their efficiency in different fields. These frameworks are flexible and phenomena such as; Breathing, crystal swelling, linker rotation, sublattice displacement, reaction to light, reaction to heat, elasticity, etc. can be seen in them. Another property of metal-organic frameworks is their chemical and thermal stability, which has a great impact on their application. Nanocomposite prepared using conventional methods including FTIR Fourier transform infrared spectrometry, EDX X-ray diffraction analysis, FE-SEM scanning electron microscope images, XRD X-ray diffraction, TGA thermogravimetric analysis, BET specific surface area measurement analysis and magnetometer VSM vibration sample was identified. Considering the remarkable features of this nanocomposite, such as high stability, hydrophilicity and having a significant number of reactive functional groups, its use in absorbing environmental pollutants such as levofloxacin and cefixime antibiotics was investigated. The effect of different factors such as amount of adsorbent, contact time and initial concentration of the studied pollutant on the adsorption capacity of nanocomposite was investigated. Thermodynamic and kinetic studies showed that the data of absorption tests were more consistent with Freundlich temperature and the maximum absorption capacity of levofloxacin and cefixime antibiotics was calculated as 2000 and 1666.667 mg. g1-, respectively. The kinetic data follow the pseudo-quadratic model.
