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Novel polymeric sorbents based on imprinted Hg(II)-diphenylcarbazone complexes for mercury removal from drinking water
- Publication Year :
- 2016
-
Abstract
- This study describes the preparation of ion-imprinted polymers (IIPs) for the selective removal of Hg(II) ions from aqueous media. Polymeric sorbents were prepared using different synthesis approaches to understand the influence of diphenylcarbazone (DPC), used as non-polymerizable ligand, on absorption performance. In particular, bulk polymerization was first used to prepare two polymers, IIP1 and IIP2, in the absence and presence of DPC. The trapping of the ligand in IIP2, demonstrated by Fourier Transform Infrared Spectroscopy, promotes the formation of ternary complexes with mercury ions, and 4-vinylpyridine induces an increase in binding performance, as indicated by the Kavalues (1.7 × 103±0.4 M−1 and 12.1 × 103±0.5 M−1, respectively) of IIP1 and IIP2 high affinity binding sites. A third polymer (IIP3) was also synthesized using precipitation polymerization to evaluate the contribution of morphological characteristics on absorption performance compared with the addition of DPC. Competitive studies revealed a stronger influence of IIP3 morphology on selectivity performance. Indeed, monodisperse microbeads were obtained only in this case. Finally, the applicability of the polymers to real-world samples was demonstrated through batch experiments using drinking water spiked with 1μgml−1 of Hg(II) ions, and the best removal efficiency of nearly 80% was obtained for IIP2.
- Subjects :
- chemistry.chemical_classification
Polymers and Plastics
010401 analytical chemistry
Inorganic chemistry
chemistry.chemical_element
02 engineering and technology
Polymer
021001 nanoscience & nanotechnology
01 natural sciences
Nitrogen
Polymer engineering
Diphenylcarbazone, drinking water, ion imprinted polymers, mercury removal
0104 chemical sciences
Mercury (element)
chemistry.chemical_compound
Monomer
chemistry
Polymerization
Polymer chemistry
Materials Chemistry
Fourier transform infrared spectroscopy
Functional polymers
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....1d766c68a19160904732d87495f2fba4