![]() RH-NH 2 has a potential industrial application due to its low-cost and high demulsification efficiency.Īdewunmi AA, Kamal MS, Solling TI (2021) Application of magnetic nanoparticles in demulsification: a review on synthesis, performance, recyclability, and challenges. It migrated rapidly to the oil–water interface and disrupted the interfacial film via synergistic effect of the π-π/n-π interaction, leading to demulsification. A possible demulsification mechanism was proposed, which indicated that RH-NH 2 was amphiphilic, with high interfacial activity and stronger capability to reduce IFT. ![]() The zeta potential of the O/W emulsion was − 37 ± 1.8 mV while that of RH-NH 2 was 20.8 ± 1.0 mV, which facilitated the electrostatic neutralization and reduced the electrostatic repulsion between oil droplets. The results showed that the IFT values of asphaltene and RH-NH 2 (200 mg/L) was 22.58 mN/m and 16.42 mN/m, respectively. In addition, dynamic interfacial tension (IFT), wettability, zeta potential, interfacial activity and adsorption capability of RH-NH 2 at the interface were also investigated. When the dosage was 200 mg/L, the W T and W R values of the emulsion-1 (with 1% crude oil) were 91.9 ± 0.9% and 99.14 ± 0.1%, respectively. When the dosage of RH-NH 2 was 50 mg/L, the light transmittance (W T) and corresponding oil removal efficiency (W R) of the separated water were 90.2 ± 1.8% and 94.82 ± 0.95%, respectively, in the emulsion-0.2 (containing 0.2% crude oil). RH-NH 2 was characterized using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). ![]() In this study, a RH-NH 2 demulsifier was prepared for the separation of O/W emulsions by grafting ethylenediamine onto natural rice husk. A large number of stable oil-in-water (O/W) emulsions are generated by the petroleum industry each year, resulting in a series of operational and environmental challenges.
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