Fig. 5From: A Hydrothermal Synthesis of Fe3O4@C Hybrid Nanoparticle and Magnetic Adsorptive Performance to Remove Heavy Metal Ions in Aqueous SolutionRelationship between the removal efficiency and time for the adsorption of Pb (II), Cd (II), Cu (II), and Cr (VI) by Fe3O4@C (400 mg L−1) sample at initial concentrations of heavy metal ions as 10 mg L−1, respectivelyBack to article page