Polyvinylpropyllidone decorated manganese ferrite based cues for the efficient removal of heavy metals ions from waste water

Heavy metals present in wastewater have adverse effect on human health particularly when the concentration increases above the standard values as recommended by World Health Organization (WHO). Many attempts have been made to remove toxic metals from water. In the present study, PVP@MnFe₂O₄ NPs as adsorbent material has been synthesized through simple, fast and ecofriendly sonochemical method. Modification of Fe₃O₄ NPs with Mn (II) and PVP enhanced surface area andimpart stability, respectively. The higher adsorption capacity for metal ions Pb²⁺,Cd²⁺, Ni²⁺ was achieved in the presence of Mn (II), which decreases the point of zero charge. PVP@MnFe₂O₄ NPswere characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FT-IR). Adsorption capacity of PVP@MnFe₂O₄ NPs for metals ions increased by increasing the pH from 5 to 9. Adsorption rate of metal cations on the PVP@MnFe₂O₄ NPs was in the following order: Pb²⁺ > Cd²⁺ > Ni²⁺. The efficiency of Fe₃ O₄ NPs_, MnFe₂O₄ NPs_, and PVP@MnFe2O4 NPs was also compared. The as synthesized PVP@MnFe₂O₄ NPs can be used in water treatment and other environmental applications as adsorbent.