Three new complexes of Co(II), Ni(II), and Zn(II), containing ligand of Schiff base (DHMA) derived from methyldopa (mdop) with 3-hydroxybenzaldehyde have been prepared.The synthesized ligand and its complexes were diagnostics by using different physical techniques, The results showed that the complexes have an octahedral shape.In addition it has been studied the adsorption behavior, Uv-Vis techniq...