Selective Cu(II) Adsorption from Aqueous Solutions Including Cu(II), Co(II), and Ni(II) by Modified Acrylic Acid Grafted PET Film
Figure 3
SEM micrographs of (a) ungrafted PET film, and (b) AAc grafted PET film. (b1) Graft chains are attracted by hydrogen bonding and the functional groups are inaccessible to the metal ions. (c) Modified AAc grafted PET film. (c1) Graft chains are repulsed by electrostatic force of –COO− group and the functional groups are accessible to the metal ions.
