Fig. 2From: Adsorption of Cadmium Ions from an Aqueous Solution on a Highly Stable Dopamine-Modified Magnetic Nano-Adsorbenta FTIR spectra of (a) Fe3O4, (b) PDA microspheres, (c) Fe3O4@PDA, and (d) Fe3O4@PDA-Cd2+; XPS spectra of b wide-scan, c O 1s, d N 1s, and e Cd 3dBack to article page