Pathogenic viruses in drinking water are seriously harmful to human health and highly resist to conventional disinfections. As a kind of promising attempts for pollution remediation, Fe-based nanoparticles show excellent performance in removing contaminants. In this study, the Fe-Ni nanoparticles were synthesized using the self-designed device and used for bacteriophage inactivation in water. Scanning electron microscope (SEM) and X-ray diffraction (XRD) showed that the as-prepared Fe-Ni particles were spherical and the average particle size was 99 nm. And the synthesized Fe-Ni nanoparticles achieved much higher removal efficiency of bacteriophage f2 than nanoscale zero-valent iron (nZVI), while Ni nanoparticles showed no effect on the bacteriophage f2. The highest removal efficiency of bacteriophage f2 by Fe-Ni nanoparticles was obtained when the ratio of Fe: Ni was 5:1. In addition, the removal efficiency of phage f2 under aerobic conditions was significantly higher than that under anaerobic conditions with Fe-Ni nanoparticles, and the role of Ni was proved as a catalyst in the system. Besides, the effect of initial pH, initial concentration of bacteriophage f2, particles dose, rotation rate and temperature on the removal efficiency of bacteriophage f2 were tested. The results showed that the removal efficiency of bacteriophage f2 didn’t change obviously in the test pH range (5-8), and was positively related with the rotation rate and negatively related with the initial concentration of bacteriophage f2. The particles dose could increase the removal efficiency of phage f2, but the removal efficiency would decrease when the dose was too much due to the aggregation of nanoparticles. The increase of temperature could increase the removal efficiency initially, but decrease the removal efficiency due to the accelerated corrosion of iron.

Removal of bacteriophage f2 in water by Fe-Ni nanoparticles: optimation of Fe/Ni ratio and influencing factors

256th National Meeting (2018)

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