A novel nanometer-sized chelating resin (NSCR)
was prepared via two steps, First step: copolymerization reac-
tion of N-methacryloxyphtalimide (NMP) with
methylenebisacrylamide (MBA) by suspension polymerization
method to give ultrafine poly (NMP-co-MBA). Second step:
reaction of triethylenetetra
mine (TETA) with poly (NMP-co-
MBA) to give NSCR. The prepared NSCR was characterized
by Fourier transform infrared spectroscopy (FT-IR), scanning
electron microscopy (SEM), Tran
smission 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 solu-
tions. 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 exper-
imental data of adsorption isotherms were convenient for
Langmuir isotherm, and the kinetic data illustrated that the
removal process was described by pseudo-second order kinetic
model. The parameters of Thermo dynamic illustrated that the
process of adsorption was endothermic and spontaneous reac-
tion. The prepared NSCR was regenerated and used repetitive-
ly for five times with small decrease in adsorption capacity |
