PEI@SA Microsphere Preparation and Its Adsorption to Methyl Blue
PEI@SA adsorbent based on sodium alginate(SA)integrated with polyethyleneimine(PEI)was prepared using crosslinking method,which was employed for the elimination of methyl blue(MB).The chemical structure and the surface morphology of PEI@SA were characterized by FTIR and SEM.Subsequently,the influence of pH value,initial dye concentration and adsorption time on the MB adsorption was explored.Then,the adsorption process was fitted with isotherm model and kinetic model.The results show that the adsorption of MB is aligned to the Langmuir adsorption model and the quasi-second-order kinetic model.PEI@SA presents maximum adsorption capacity of 88.34 mg/g for MB at 25 ℃,which is 10 times higher than that of pristine SA adsorbent.
Sodium AlginatePolyethyleneimineAdsorbentMethyl BlueIsotherm ModelKinetic Model
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