چكيده به لاتين
In this study, ZrO2 nanoparticles were synthesized by microwave-assisted coprecipitation synthesis and were identified by various techniques such as FT-IR, XRD, DRS, BET and SEM. The results obtained from BET analysis showed that the synthesized zirconium oxide has a high surface area (157.97 m2/g), so its activity in adsorption of methylene blue dye in aqueous solution was investigated. The results showed that this metal oxide has the ability to absorb methylene blue dye with a concentration of 5 mg/L up to 67%. It can also absorb chromium ions at a concentration of less than 20 mg/L and at pH = 5 and a time of less than 5 minutes to above 70%. Then, magnetic ZrO2/MnFe2O4 nanoparticles were prepared by mechanochemical method and it was found that it can absorb methylene blue dye at a concentration of 5 mg/L at about 65%. The advantage of this magnetic compound is easy separation using an applied external magnetic field. In addition, the ZrO2/MnFe2O4 magnetic compound was used as a catalyst to prepare imidazole substitutions, the results showed that the presence of this compound resulted in an 84% efficiency for the three-component reaction. Also in this study, zirconium oxide coated membrane was used for membrane processes in oil effluent treatment, due to its high economic efficiency and ability to combine with other common effluent treatment processes to remove contaminants. Porcelain, alumina, porosity and carboxymethylcellulose were used as correlators to make the membrane. Synthetic effluent and effluent of Isfahan refinery have been used to prepare the feed. In the microfiltration process by ceramic membrane and ceramic membrane coated with ZrO2, various factors such as pressure and oil concentration are effective. The results of the screwing showed that the clamping was reduced in the coated ceramic. Also turbidity, total amount of organic carbon, rejection and clogging showed that the ceramic membrane with ZrO2 coating was able to have the quality of the product with 98 and 99% efficiency compared to the ceramic membrane in the synthetic effluent and effluent of Isfahan refinery, respectively.