Cu(II) immobilization onto a one-step synthesized poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) resin: Kinetics and XPS analysis

2016
Authors
Maksin, Danijela
Nastasović, Aleksandra

Maksin, Tatjana N
Sandic, Zvjezdana P
Loos, Katja
Ekmeščić, Bojana
Onjia, Antonije E.

Article (Published version)
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Show full item recordAbstract
Synthesis of an unconventional resin based on 4-vinylpyridine (4-VP) and its Cu(II) sorption behavior were studied. Three samples of macroporous crosslinked poly(4-vinylpyridine-co-ethylene glycol dimethacrylate) (P4VPE) with different porosity parameters were prepared by suspension copolymerization by varying the n-heptane amount in the inert component. The samples were characterized by mercury porosimetry, elemental analysis and X-ray photoelectron spectroscopy (XPS). The sorption of P4VPE for Cu(II) ions, determined under non-competitive conditions, was relatively rapid, i.e., the maximum capacity was reached within 30 min. The maximum experimental sorption capacity for the sample with the highest values of pore diameter and specific pore volume (sample 3, Q(eq) = 89 mg g(-1)) was 17.5 times higher than for the sample with the lowest values of pore diameter and specific pore volume (sample 1, Q(eq) = 5.1 mg g(-1)). Since the values for pyridine content in all P4VPE samples were almo...st the same, it was concluded that the porosity parameters have predominant influence on Cu(II) sorption rates on P4VPE. The sorption behavior and the rate-controlling mechanisms were analyzed using six kinetic models (pseudo-first order, pseudo-second order, Elovich, intraparticle diffusion, Bangham and Boyd models). XPS study clarified the nature of the formed P4VPE-Cu(II) species.
Keywords:
4-vinylpyridine / macroporous copolymer / sorption kinetics / XPSSource:
Hemijska industrija, 2016, 70, 1, 9-19Publisher:
- Association of Chemical Engineers of Serbia
Projects:
- Research and verification of the multidisciplinary forensic methods in (RS-37021)
- Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden (RS-43009)
DOI: 10.2298/HEMIND141203007M
ISSN: 0367-598X