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Pb(II), Cu(II), and Co(II) were used as adsorbate. 1000 mg/l standard stock solution of each metal ions were prepared by dissolving Pb(NO3)2, Cu(NO3)2.3H2O and Co(NO3)2.6H2O respectively in distilled water. All reagents used in the experiment were of analytical grade. | Adsorption of Pb(II), Co(II) and Cu(II) from aqueous solution onto manganese dioxide (γ - MNO2) nanostructure