Highly efficient removal of Cr(vi) ions from wastewater by the pomegranate-like magnetic hybrid nano-adsorbent of polydopamine and Fe3O4 nanoparticles

Fe₃O₄ nanoparticles have attracted extensive attention for solving Cr(vi) pollution because they can effectively reduce Cr(vi) to the less toxic and less soluble Cr(iii)-containing species.