The effects of Zn (II), Mn (II), Cu (II), and Pb (II)
on Cd adsorption were alone investigated. In Cd
solutions, Cd concentration was kept 100 mg/L and the
other metal ion was 50 mg/L. Other adsorption
conditions were same as the above experiments. Shaking
at 100 r/min for 30 min, the Cd concentrations were
measured