Preparation and application of Poly (N-formylpiperidine) in the adsorption of Pb(II) from liquid phase

Abstract Poly (N-formylpiperidine) (P (N-FPP)) was prepared by copolymerizing N-formylpiperidine and benzaldehyde. Characterization of P (N-FPP) was determined by SEM, FTIR, XRD and BET analysis. Poly (N-formylpiperidine) has the acceptable adoptive uptake of Pb (II) ions from the liquid phase using a continuous column system. Column parameters (pH, initial concentration, bed height, temperature, and flow rate) were studied. The continuous system was evaluated by two kinetic models (Thomas and Adams-Bohart models). The maximum Pb(II) adsorption capacity 3.8325 mg/g was obtained at pH 4, flow rate 2 ml/min and 30 °C. Also, kinetic data showed that the Thomas model had better convenience (R2 = 998) than the Adams-Bohart model (R2 = 891). Finally, the regeneration process indicates that the P (N-FPP) had a good efficiency for 4 adsorption cycles.