Synthesis, adsorption kinetics and thermodynamics of ureido-functionalized Pb(ii) surface imprinted polymers for selective removal of Pb(ii) in wastewater

A novel ureido-functionalized Pb( ii )-imprinted polymer (Pb( ii )-IIP) was synthesized using Pb( ii ) ion, γ-ureidopropyltrimethoxysilane, AIBN and EGDMA as template ion, functional monomer, initiator and cross-linking agent, respectively. Pb( ii )-IIP was characterized by FTIR and SEM. The effect...

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Veröffentlicht in:RSC advances 2016-01, Vol.6 (112), p.11112-111128
Hauptverfasser: Zhu, Fang, Lu, Yanhong, Li, Luwei
Format: Artikel
Sprache:eng
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Zusammenfassung:A novel ureido-functionalized Pb( ii )-imprinted polymer (Pb( ii )-IIP) was synthesized using Pb( ii ) ion, γ-ureidopropyltrimethoxysilane, AIBN and EGDMA as template ion, functional monomer, initiator and cross-linking agent, respectively. Pb( ii )-IIP was characterized by FTIR and SEM. The effect of initial concentration of Pb( ii ) ions, adsorption time, temperature and pH values on the adsorption capacity of Pb( ii )-IIP were studied. The equilibrium adsorption capacity of Pb( ii )-IIP could reach 97.5 mg g −1 . Langmuir models were adopted and R 2 was 0.9908. The adsorption process is endothermic and could occur spontaneously. The relative selectivity coefficients of Pb( ii )-IIP were 3.55, 7.02, 3.77 for Pb 2+ /Cd 2+ , Pb 2+ /Cu 2+ , Pb 2+ /Zn 2+ respectively. A surface ion imprinting technique was utilized to synthesize a novel ureido-functionalized Pb( ii )-imprinted polymer where the Pb( ii ) ion, γ-ureidopropyltrimethoxysilane, AIBN and EGDMA were used as the template ion, functional monomer, initiator and cross-linking agent. ​
ISSN:2046-2069
2046-2069
DOI:10.1039/c6ra18736f