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 |
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Hauptverfasser: | , , |
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. |
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ISSN: | 2046-2069 2046-2069 |
DOI: | 10.1039/c6ra18736f |