A novel nanometer-sized chelating resin (NSCR)
was prepared via two steps, First step: copolymerization reaction of N-methacryloxyphtalimide (NMP) with
methylenebisacrylamide (MBA) by suspension polymerization
method to give ultrafine poly (NMP-co-MBA). Second step:
reaction of triethylenetetramine (TETA) with poly (NMP-coMBA) to give NSCR. The prepared NSCR was characterized
by Fourier transform infrared spectroscopy (FT-IR), scanning
electron microscopy (SEM), Transmission electron microscopy
(TEM), Brunauer-Emmett-Taller (BET) and thermogravimetric
analysis (TGA). This study illustrated the capability of NSCR
for extraction of Cu(II), Co(II) and Ni(II) from aquatic solutions. The pH effect, metal ions concentration, temperature and
contact time were elaborated in batch experiments. The results
showed that high capacities were 1.3, 1.0 and 0.95 mmol/g
resin for Cu(II), Ni(II) and Co(II) ions, respectively. The experimental data of adsorption isotherms were convenient for
Langmuir isotherm, and the kinetic data illustrated that theremoval process was described by pseudo-second order kinetic
model. The parameters of Thermo dynamic illustrated that the
process of adsorption was endothermic and spontaneous reaction. The prepared NSCR was regenerated and used repetitively for five times with small decrease in adsorption capacity |
