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- W3013703144 abstract "Produced water always includes stable emulsions of crude oil in water that are typically hard to treat with standard techniques of separation, caused in several environmental and ecological problems. In this study, iron oxide Fe3O4 magnetic nanoparticles (MNPs) were synthesized and characterized via co-precipitation method of iron salts (Fe+2 and Fe+3 ions) at 80°C, pH=14 and 0.5 molar ratio of Fe+2/Fe+3. MNPs were coated with different materials (PVP and chitosan) to enhance the effectiveness and stability of them. MNPs and coated-MNPs were characterized by X-Ray Diffraction (XRD), Atomic Force Microscope (AFM), Fourier-Transform Infrared Spectroscopy (FTIR) and Zeta potential analysis. Coated-MNPs were applied as coagulant in coagulation and flocculation process for removing oil droplets from oilfield produced water, the experiments occurred at 25°C and mixing rate of 240 rpm for 3 min and 40 rpm for 20 min with concentration range of coagulant (20-120) ppm, pH value (5-8) and reaction time (0.5 h to 3h). Removal percent was developed with increased in pH value to 6, while it was decreased when pH was more than 6. Increasing in concentration of coagulant give rise to increase the removal efficiency till 80 ppm, then the removal percent decreased at dosage greater than 80 ppm. Removal efficiency enhanced with increment in reaction time from 0.5 h to 3 h and decreased when reaction time reach to 5 h. The best oil removal efficiency was 90% that obtained when PVP-MNPs were used as coagulant with 80 ppm concentration and pH=6 after 3 h of reaction time. The MNPs can be recovered using magnetic field." @default.
- W3013703144 created "2020-04-03" @default.
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- W3013703144 date "2020-01-01" @default.
- W3013703144 modified "2023-10-16" @default.
- W3013703144 title "Synthesis and characterization of coated magnetic nanoparticles and its application as coagulant for removal of oil droplets from oilfield produced water" @default.
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- W3013703144 doi "https://doi.org/10.1063/5.0000279" @default.
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