چكيده به لاتين
Microplastics as hazardous and emerging pollutants have attracted the attention of researchers and human societies, that are found in water, soil, air and even organisms. This pollutant interacts with other pollutants by absorbing harmful chemicals, antibiotics and heavy and toxic metals on its surface, hence it can have a significant effect on microorganisms. Humans are exposed to microplastics through inhalation, ingestion and skin contact. The suitable properties of ZIF-L, ZIF-L/TiO2 and ZIF-L/ZnO composites, such as high surface area, suitable catalytic activity, etc., have made these materials appropriate for removing various organic pollutants from water. Therefore, in this research, ZIF-L was synthesized and ZIF-L/TiO2 and ZIF-L/ZnO photocatalysts were prepared, and the structural properties of ZIF-L and photocatalysts were determined using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and field emission scanning electron microscope (FE-SEM) were investigated. The results showed that ZIF-L and the desired photocatalysts were successfully prepared. Next, polyvinyl chloride microplastic was removed using ZIF-L and prepared photocatalysts in different conditions. According to the results of the removal tests, polyvinyl chloride can be removed from water as much as 75.37% by using ZIF-L, 98.66% by using ZIF-L/TiO2 photocatalyst, and 93.19% by using ZIF-L/ZnO photocatalyst. The results of the removal of polyvinyl chloride pollutant from water using ZIF-L show that the best removal results were obtained in separate tests in 36 minutes, pH=8 and the amount of ZIF-L equal to 0.20 mg. Also, these results were obtained for ZIF-L/TiO2 photocatalyst in a period of 36 minutes, pH=8 and the amount of photocatalyst was 0.15 mg, and for ZIF-L/ZnO photocatalyst in a period of 36 minutes, pH=7 and the amount of photocatalyst was 0.20 mg.
