Rapid removal of Ni(II) from aqueous solution using 3-Mercaptopropionic acid functionalized bio magnetite nanoparticles

• This method was eco-friendly, cost effective and easy to handle.
• This 3 MPA@Fe3O4 MNPs effectively removed Ni(II) from aqueous solution.
• 3 MPA@Fe3O4 MNPs has excellent adsorption (42.01 mg/g) and recyclable property.

The surfaces of bio magnetite nanoparticles were functionalized with 3-Mercaptopropionic acid (3 MPA) and used as a high-capacity and recyclable adsorbent for the rapid removal of Ni(II) from aqueous solution. The 3 MPA@Fe3O4 MNPs were characterized by Fourier transformed infrared analysis (FT-IR), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS) and vibrating sample magnetometer (VSM) analysis. This 3 MPA@Fe3O4 MNPs have been used for removal of Ni(II) from aqueous solution. The hysteresis loops of 3 MPA@Fe3O4 MNPs shows an excellent ferromagnetic behavior with saturation magnetization value of 14.02 emu/g. The adsorption isotherm data were fitted well to Langmuir isotherm, the monolayer adsorption capacity was found to be 42.01 mg/g at 303 K. The experimental kinetic data fitted very well the pseudo-second-order model.The results indicate that the biogenic 3 MPA@Fe3O4 MNPs act as significant adsorbent material for removal of Ni(II) aqueous solution and also considered as a potential adsorbent for hazardous metal ions from wastewater.

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