Functional nitrogen-containing carbon materials CCPEI synthesis and adsorption of heavy metal ions

porous carbons with high percentage of nitrogen functional groups were synthesized by polyethyleneimine with epichlorodydrin and carbonized in nitrogen atmosphere at certain conditions.Their pore structure,graphite crystalline size,and surface morphology were characterized by nitrogen adsorption isotherms at 77 K,FT-IR spectra analysis and seanning electron microscopy.It could be seen that CCPEI has a unitary nanopore structure and nitrogen-containing functional group was preserved in crosslinking process.The adsorption capacities for Cu2+,Pd2+,Al 3+,Ce3+,La3+of CCPEI were 63.776,83.007,20.713,37.506,14.148mg/g due to its developed pore structure and nitrogen-containing chemical groups.Isothermal adsorption data of adsorption capacities for Cu2+fits the Langmuir equation and the adsorption quantity are also influenced by temperature and pH.