Removal of mercury by magnetic multi-walled carbon nanotube functionalized by 2,6-diaminopyridine

magnetic multi-walled carbon nanotubes (MWCNTs-Fe3O4) modified with 2,6-Diaminopyridine wassynthesized and used for removal of mercury (II) ions from aqueous solution. The mercury measurement was carriedout by graphite furnace atomic absorption spectrometry (GFAAS). Fourier transform infrared spectroscopy (FTIR) wasused to characterize the nanocomposites before and after functionalization. The effects of different parameters likecontact time, pH, concentration of metal ion, temperature and adsorbent mass on the extent of metal-ion adsorption fromsolution was also studied. The maximum adsorption capacity was 251.5 mg/g at pH 2.5 at initial concentration of 1000ppm and contact time of 60 min.

Keywords:

nanocomposite , Removal , mercury , magnetic multi-walled carbon nanotube , 2 , 6-diaminopyridine