Abstract
Methyl methacrylate (MMA) is grafted on multiwalled carbon nanotubes (MWCNTs) by using N 2 plasma technique. The MMA grafted MWCNTs (MWCNT- g-pMMA) are characterized by using Raman spectroscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy, thermo gravimetric analysis–differential thermal analysis (TGA–DTA), and potentiometric acid-base titration method. The application of MWCNT- g-pMMA in the removal of 4,4′-dichlorinated biphenyl (4,4′-DCB) from large volumes of aqueous solutions is investigated under ambient conditions. The results indicate that the adsorption of 4,4′-DCB on MWCNT- g-pMMA is much higher than that of 4,4′-DCB on MWCNTs, and the adsorbed 4,4′-DCB is difficult to be thermally decomposed from MWCNT- g-pMMA according to the TGA–DTA analysis. MWCNT- g-pMMA are suitable materials in the preconcentration and immobilization of polychlorinated biphenyls (PCBs) from large volumes of aqueous solutions in environmental pollution cleanup.
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