Copper (II) adsorption capacity of a novel hydroxytyrosol-based polyacrylate

Loris Pietrelli, Marco Palombo, Vincenzo Taresco, Fernanda Crisante, Iolanda Francolini, Antonella Piozzi

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Abstract

A novel hydroxytyrosol-based polyacrylate polymer material (pAcHTy) endowed with metal ion adsorption ability was obtained by free radical polymerization of a monomer containing a hydroxytyrosol precursor (tyrosol). Hydroxytyrosol (HTy) is the main natural polyphenolic compound with antioxidant activity occurring in virgin olive oil and in olive oil wastewaters. pAcHTy showed a good chelating activity with respect to Cu2+ions, especially at pH 6 where short equilibrium times and high adsorption capacity were observed (146 mg/g). From thermodynamic parameters, it has been found that the sorption process was spontaneous at low temperature and exothermic in nature. The adsorption process has been studied by employing three simplified kinetic models, including a pseudo-first-order equation, pseudo-second-order equation, and intraparticle diffusion equation. Kinetic parameters, rate constants, equilibrium sorption capacities, and related correlation coefficients, for each kinetic model, were calculated and discussed. It was shown that the adsorption of Cu2+ions could be described by the pseudo-second-order equation, suggesting that the adsorption process is presumable a chemisorption. The pAcHTy polymer could find an important application in the medical field, particularly in chelation therapy as well as in the wastewater and drinking water treatment plants.
Original languageEnglish
Pages (from-to)1175 - 1191
Number of pages17
JournalPolymer Bulletin
Volume74
Issue number4
DOIs
Publication statusPublished - 1 Apr 2017
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Pietrelli, L., Palombo, M., Taresco, V., Crisante, F., Francolini, I., & Piozzi, A. (2017). Copper (II) adsorption capacity of a novel hydroxytyrosol-based polyacrylate. Polymer Bulletin, 74(4), 1175 - 1191. https://doi.org/10.1007/s00289-016-1770-8