چكيده به لاتين
In recent decades, medicinal compounds have been identified as a new range of pollutants in aquatic environments, the primary sources of drug manufacturing processes, and municipal wastewater. So far, different methods have been used to remove these pollutants from the aquatic environment. The use of adsorption processes has been considered due to its flexible and straightforward operational design, high economic value, and high effectiveness for drug contaminants. Today, various materials are used to remove pharmaceutical contaminants, including carbonaceous materials, metal-organic structures, clay minerals, zeolites, etc. Many studies have recently been conducted to investigate the performance of clay minerals and layered compounds, including layered double hydroxide (LDH) as adsorbents in the aquatic environment. Layered double hydroxide is a class of layered compounds that form a crystalline lattice with van der Waals forces. These materials are composed of positively charged brucite-type layers, and anions and water molecules are located in the interlayer space. In this study, a magnetic nanocomposite was prepared from layered double hydroxide containing a rhamnolipid surfactant. The nanocomposite was synthesized by the combined method of co-precipitation and ultrasound waves with iron oxide nanoparticles and was investigated for the non-steroidal anti-inflammatory drug's adsorption ibuprofen from the Aquatic environment. The characterization of the resulting nanocomposite was studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), infrared spectroscopy (FT-IR), transmission electron microscopy (TEM), and vibrating sample magnetometer (VSM) measurements. Design expert software was used to determine the number of necessary tests to identify the optimal adsorption conditions. According to the input data to the software, 28 experiments were performed. All experiments were performed in a volume of 20 ml, with a concentration of 80 ppm. The highest adsorption capacity was obtained based on the Langmuir adsorption isotherm model of 200.09 mg / g, and the pseudo-second-order model was the most consistent with the experimental data. Due to their magnetic properties, the synthesized nano adsorbents are easily separated from the aquatic environment after the adsorption process and can be reused.
