“As these complexes do not adsorb, Cu(II) and Co(II ) suffer greater suppression from aspartic acid than the other metals.”
“ Aspartic acid slightly enhanced the adsorption of Pb(II), Zn(II), and Co(II ) at low pH, but inhibited the adsorption of all the metal ions at higher pH. Adsorption of Cu(II) and Co(II) was inhibited strongly.”
“Cu(II) and Co(II ) form complexes with aspartic acid more strongly than the other metals.”