Plasma Induced Grafting Carboxymethyl Cellulose on Multiwalled Carbon Nanotubes for the Removal of UO<sub>2</sub><sup>2+</sup> from Aqueous Solution

Carboxymethyl cellulose (CMC) is grafted on multiwalled carbon nanotubes (MWCNT) by using plasma techniques. The CMC grafted MWCNT (MWCNT-<i>g</i>-CMC) is characterized by using Fourier transform infrared spectra (FT-IR), Raman spectra, powder X-ray diffraction (XRD), thermogravimetric analysis (TGA)−differential thermal analysis (DTA), scanning electron microscopy (SEM), and N<sub>2</sub>-BET methods in detail. The application of MWCNT-<i>g</i>-CMC in the removal of UO<sub>2</sub><sup>2+</sup> from aqueous solution is investigated. MWCNT-<i>g</i>-CMC has much higher sorption ability in the removal of UO<sub>2</sub><sup>2+</sup> than raw MWCNT. The MWCNT-<i>g</i>-CMC is a suitable material in the preconcentration and solidification of heavy metal ions from large volume of aqueous solutions.