Oxidative degradation of bisphenol A and 17α-ethinyl estradiol by Fenton-like activity of silver nanoparticles in aqueous solution

Chang Min Park, Jiyong Heo, Yeomin Yoon

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

Abstract

Silver nanoparticles (AgNPs) have been reported to have antibacterial activities and cytotoxicity, resulting from the dissolved silver cation (Ag+) and its soluble complexes. However, to our knowledge, little has been reported about their potential use in degrading organic contaminants such as endocrine-disrupting compounds in aqueous solution. In this first report on the subject, we examined the effectiveness of the oxidative degradation of bisphenol A (BPA) and 17α-ethinyl estradiol (EE2) in water by reactive oxygen species formed during the decomposition of H2O2, assisted by polyvinylpyrrolidone (PVP)-stabilized AgNPs. The dissolution of AgNPs accompanied generation of OH[rad] at low pH. The fully dispersed PVP-AgNPs in the presence of H2O2exhibited fast degradation kinetics for EE2 at a typical aquatic condition of pH (6–7). The oxidation kinetics of BPA and EE2 by PVP-AgNPs can be interpreted using three different modeling approaches: an initial pseudo-first-order, a retarded first-order rate, and Behnajady-Modirshahla-Ghanbery kinetic equation. The findings showed that AgNPs may have potential to facilitate the in situ oxidation for emerging contaminants in the aqueous environment.

Original languageEnglish
Pages (from-to)617-622
Number of pages6
JournalChemosphere
Volume168
DOIs
StatePublished - 2017

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd

Keywords

  • 17α-ethinyl estradiol
  • Bisphenol A
  • Degradation
  • Hydroxyl radicals
  • Silver nanoparticle

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