Insights into Enhanced Peroxydisulfate Activation with B and Fe Co-Doped Biochar from Bark for the Rapid Degradation of Guaiacol

Molecules. 2023 Nov 14;28(22):7591. doi: 10.3390/molecules28227591.

Abstract

A boron and iron co-doped biochar (B-Fe/biochar) from Masson pine bark was fabricated and used to activate peroxydisulfate (PDS) for the degradation of guaiacol (GL). The roles of the dopants and the contribution of the radical and non-radical oxidations were investigated. The results showed that the doping of boron and iron significantly improved the catalytic activity of the biochar catalyst with a GL removal efficiency of 98.30% within 30 min. The degradation of the GL mainly occurred through the generation of hydroxyl radicals (·OHs) and electron transfer on the biochar surface, and a non-radical degradation pathway dominated by direct electron transfer was proposed. Recycling the B-Fe/biochar showed low metal leaching from the catalyst and satisfactory long-term stability and reusability, providing potential insights into the use of metal and non-metal co-doped biochar catalysts for PDS activation.

Keywords: B/Fe co-doping; Masson pine bark; biochar; peroxydisulfate activation.

MeSH terms

  • Boron*
  • Charcoal
  • Iron
  • Plant Bark*

Substances

  • biochar
  • Boron
  • Charcoal
  • Iron

Grants and funding

This research was funded by the Natural Science Foundation of China (grant no. 22208057 and 22208163), Natural Science Foundation of Fujian Province, China (grant no. 2020J01506 and 2022J01108), and Fuzhou University Testing Fund of precious apparatus (Grant no. 2023T016).