Hydrophilic and positively charged polyethylenimine-functionalized mesoporous magnetic clusters for highly efficient removal of Pb(II) and Cr(VI) from wastewater

Schematic of the facile removal of heavy metal ions using branched polyethylenimine-functionalized mesoporous magnetic clusters (b-MG) and positively charged branched polyethylenimine-functionalized mesoporous magnetic clusters (p-MG) as adsorbents.346