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Keywords:

  • adsorption;
  • heavy metals;
  • ion exchange;
  • magnesium silicate;
  • nanotubes
Thumbnail image of graphical abstract

Magnetic nanotubes formed with magnesium silicate (γ-Fe2O3@MgSNTs) were produced by a well-controlled programmed synthesis from carbon nanotubes (CNTs, see scheme). The nanotubes show high adsorption capacities for PbII and CdII. An ion-exchange mechanism between the MgII ions and PbII or CdII ions was proposed and confirmed.