The magnetic NiFe2O4 nanoparticles have been synthesized and used as adsorbents for cadmium removal from aqueous solution. The NiFe2O4 nanoparticles were characterized by scanning electron microscope (SEM), Transmission electron microscope (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectra (FTIR). Various parameters, which can affect the adsorption such as pH, adsorption time and adsorbent dose have been fully investigated. The results reveal that the magnetic adsorbent can be easily removed by a simple external magnet with high separation efficiency. In addition, the process is clean and safe for purifying water pollution. The prepared NiFe2O4 magnetic nanoparticles could thus be used as favorable adsorbents for the remove cadmium from polluted water.

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