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Rapid population growth and lack of access to safe and clean potable water have recently been of major global concerns. The bioaccumulation of the substantial water contaminants in the living cells brings genuine health issue to the human and generates significant environmental impact. Carbon Nanotubes (CNTs) is one of the advanced technologies recently applied for the wastewater treatment due to outstanding and diverse physio-chemical properties offered by CNTs. The large surface area, flexibility in number of activated functional groups, reasonable adsorption behavior in water, and excellent removal efficiency of heavy metals are of those properties which introduced CNTs as a unique adsorbent. In this work the adsorption behavior of metal ions using Multi-Walled CNTs (MWCNTs) was investigated to detect and evaluate the capacity for Cobalt (CO) and Nickel (Ni) on MWCNTs. A multiple characterization techniques were applied such as Scanning Electron Microscope (SEM), Ultraviolet-Visible Spectroscopy (UV-VIS), Energy Dispersive Spectroscopy (EDS), Raman spectroscopy and Fourier Transformer Infrared (FT-IR) on the samples to illustrate the morphology and composition changes, also to locate defects, porosity, and structure changes of the sample. FT-IR spectrum shows the existence of carboxyl group after treatment with (Acidic oxidation). SEM micrographs show the occurrence of surface modification on the MWCNTs structure after treatment. The results show that CNTs are excellent and effective adsorbent for eliminating harmful media in water. Both heavy metals are strongly dependent on pH, oxidized MWCNT concentration and ionic strength. Oxidized MWCNTs may be a promising candidate for concentration of heavy metal ions from industrial wastewater.

Application of Multi-Walled Carbon Nanotubes based Materials in Heavy Metals Adsorption