In this study, we developed an effective approach for increasing the equilibrium adsorption capacity of
the interpenetrating polymer networks (IPNs) toward polar aromatic compounds. For this purpose, a
novel post-cross-linked polystyrene/poly (methyl acryloyl diethylenetriamine) (CMPS_pc/PMADETA)
IPNs was synthesized and its adsorption was evaluated from aqueous solution using p-hydroxybenzoic
acid as the adsorbate. CMPS_pc/PMADETA IPNs possessed a relatively high Brunauer–Emmett–Teller
(BET) surface area and hydrophobic networks as well as hydrophilic networks, inducing amuch enhanced
adsorption toward p-hydroxybenzoic acid. The equilibrium adsorption capacity of p-hydroxybenzoic acid
on CMPS_pc/PMADETA IPNs was remarkably larger than that on its precursors and the equilibrium data
were correlated better by Sips model than the Langmuir and Freundlich models. Furthermore, the adsorption
was a fast process, and the micropore diffusion model characterized the kinetic data very well. At a
feed concentration of 1060.8 mg/L and a flow rate of 10.8 BV/h, the dynamic adsorption capacity was calculated
to be 200.8 mg/mL wet resin.
In this study, we developed an effective approach for increasing the equilibrium adsorption capacity ofthe interpenetrating polymer networks (IPNs) toward polar aromatic compounds. For this purpose, anovel post-cross-linked polystyrene/poly (methyl acryloyl diethylenetriamine) (CMPS_pc/PMADETA)IPNs was synthesized and its adsorption was evaluated from aqueous solution using p-hydroxybenzoicacid as the adsorbate. CMPS_pc/PMADETA IPNs possessed a relatively high Brunauer–Emmett–Teller(BET) surface area and hydrophobic networks as well as hydrophilic networks, inducing amuch enhancedadsorption toward p-hydroxybenzoic acid. The equilibrium adsorption capacity of p-hydroxybenzoic acidon CMPS_pc/PMADETA IPNs was remarkably larger than that on its precursors and the equilibrium datawere correlated better by Sips model than the Langmuir and Freundlich models. Furthermore, the adsorptionwas a fast process, and the micropore diffusion model characterized the kinetic data very well. At afeed concentration of 1060.8 mg/L and a flow rate of 10.8 BV/h, the dynamic adsorption capacity was calculatedto be 200.8 mg/mL wet resin.
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