改性聚吡咯材料去除水中氟离子的性能

Modified polypyrrole (PPy) nanofibers with different diameters were synthesized by controlling the synthesis conditions and adding ARG, MO and α-CD+MO in the polymerization process, respectively. The physicochemical properties of the as-prepared PPy were characterized by field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy(FTIR), nitrogen adsorption desorption analysis (BET) and zeta potential analysis. The results showed that the specific surface area of PPy with special morphology was 7-10 times higher than that of traditional granular PPy. Compared with traditional granular PPy, the modified PPy with special morphology can reach the adsorption equilibrium within 10 min at room temperature and pH=5 when the initial concentration of F^- was 3-5mg/L and the dosage was 2g/L. The concentration of F^- can be reduced to less than 1mg/L in the Integrated Wastewater Discharge Standard (GB 5749-2006). The results indicated that the control of special morphology had a great influence on the adsorption of F^- by PPy. In addition, the adsorption behavior was a spontaneous exothermic process, which can be well fitted by Langmuir model. The removal of F^- by PPy was mainly the result of ion exchange.