Polybenzoxazine: A powerful tool for removal of mercury salts from water

Omer S. Taskin, Baris Kiskan, Abdullah Aksu, Nuray Balkis, Jens Weber, Yusuf Yagci*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

A reusable macroporous polybenzoxazine resin with high specific surface area was prepared as sorbent material for the removal of mercury salts. For this purpose, allyl-functionalized bis-benzoxazine was cured in dimethyl sulfoxide by thermally activated ring-opening polymerization at 180 C for 3 d followed by a freeze-drying process. The porous structure of the resin was confirmed by SEM analysis and N2 adsorption/desorption studies at 77.3 K. Among various metal ions, namely, PbII, FeII, MnII, CuII, ZnII, and CdII, the porous polybenzoxazine resin exhibited a specific sorption behaviour towards Hg II. Mainly chemisorption and to some extent adsorption mechanisms were proposed for the observed high loading capacity of the resin. As evidenced by FTIR spectral analysis, the chemisorption is attributed to the coordination system formed between free OH and tertiary amino groups in the polybenzoxazine structure and HgII ions. It was also demonstrated that the porous polybenzoxazine can be regenerated simply by treatment with acids. The resin was recycled for up to seven cycles without any significant loss of activity, as proved by sorption and desorption experiments.

Original languageEnglish
Pages (from-to)10953-10958
Number of pages6
JournalChemistry - A European Journal
Volume20
Issue number35
DOIs
Publication statusPublished - 25 Aug 2014

Keywords

  • chemisorption
  • environmental chemistry
  • macroporous materials
  • mercury
  • polymers

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