Multi Walled Carbon Nano Tubes and Ferric Oxide Nanomaterial as Adsorbents for Removal of Some Heavy Metals from Contaminated Water (Ground and Industrial Waste Water)

The aim of this study was to find out an available and low cost material to reach the permissible levels of the heavy metals Mn²⁺ , Fe²⁺ and pb²⁺) in the contaminated water (ground and industrial waste water) taken from Kaha, El-Qulayoubia Governorate using multi walled carbon nanotubes ( MWCNTs) prepared from chemical vapor deposition      (CVD) and ferric oxide nanoparticle(Fe₂O₃) with potassium permanganate(KMnO₄). Also, it involved the characterization of MWCNTs and  Fe₂O₃ nanoparticle and determine the optimal conditions for the treatment. The effects of MWCNTs,  Fe₂O₃ nanoparticle and KMnO₄ on removal of manganese , iron  and lead from contaminated water was the main target of this investigation. In this work the highest initial Mn²⁺ , Fe²⁺ and pb²⁺ ion concentrations (C₀) were found to be 3.42 , 4.2 and 23 mg/L, respectively, were treated with multiwall carbon nanotubes ,ferric oxide and potassium permanganate. MWCNTs was of  20-30 nm outer diameter, 5-10 nm internal diameter, surface area of 207.13 m²/g, carbon content 90.05%, oxygen content 6.9% and purity above 87%,while, Ferric oxide particle size averaged     5-10 nm, ferric content 44.64%, oxygen content 41.67% and carbon content 10.97%.
The optimum conditions for removing Mn²⁺ and Fe²⁺ ion from the contaminated water with MWCNTs/KMnO₄, were a pH of 7.5, volume KMnO₄ 0.25 mL, adsorbent weight  of 0.05 g and a contact time of  90 min. The optimum conditions for removing Pb²⁺ ion with Fe₂O₃/KMnO₄ were a pH at 6.7, adsorbent weight 0.06 g, volume of KMnO4 1.25 mL and a contact time of 120 min.