چكيده به لاتين
Today, the drugs used for treatment, especially antibiotics, due to their widespread use, constitute a significant part of water and wastewater pollutants, and due to their effects on the environment, they need an effective and efficient method, and at the same time It is now economically viable to remove these pollutants. There are several ways to remove and remove these contaminants, including advanced oxidation, coagulation, membrane processes, surface adsorption, but among the methods, surface adsorption is a priority due to the simplicity of the process and low cost compared to other methods. This method plays a key role, so researchers are seeking to optimize this process using various adsorbents, which today nanosorbents are more important than other adsorbents due to the high surface-to-volume ratio. The study also used the "magnetic-chitosan composite" nanosorbent synthesized using the green method for the experimental study of diclofenac drug removal. In nanosorbent synthesis, green tea extract prepared in the laboratory was used as a reducing agent and in situ method was used for nanosorbent synthesis. After synthesis, the properties of nanosorbents were determined by using XRD, FTIR, FE-SEM tests. The accuracy of nanosorbent synthesis was also confirmed using the green method. After batch experiments, the effect of effective parameters were determined and their optimal values were contact time of 10 hours, adsorbent dose 0.6 g / L ,initial concentration 60 mg / L, respectively ,PH = 6.68 and temperature 25. C. The data were more consistent with the pseudo second equation and the Langmuir isotherm, with the highest absorption capacity of 69.48 mg / g. These results suggest that synthesized nanocomposites could be a good option for eliminating diclofenac.
