Fe3O4 supported on water caltrop-derived biochar toward peroxymonosulfate activation for urea degradation : the key role of sulfate radical

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Guang Li
  • Xiao-qiang Cao
  • Na Meng
  • Yi-meng Huang
  • Xu-dong Wang
  • Yuan-yuan Gao
  • Xuan Li
  • Ting-shu Yang
  • Bo-lai Li
  • Xian-jun Lyu
  • Yue Liang

Detail(s)

Original languageEnglish
Article number133595
Journal / PublicationChemical Engineering Journal
Online published14 Nov 2021
Publication statusOnline published - 14 Nov 2021

Abstract

A new type of iron-doped and porous biochar (Fe@BC) derived from water caltrop was systematically investigated to catalyze the organic pollutants degradation by peroxymonosulfate (PMS). The effectiveness of this novel material was tested by treating excessive urea concentrations in swimming pool water. It exhibited good PMS activation capacity, achieving urea removal of 100% within 15 min. The Fe@BC/PMS system exhibited excellent resistance to common anions. Only chloride showed a small inhibitory effect, and the removal efficiency of urea decreased by 10% ([Cl]0 = 10 mM). Quenching experiments and electron paramagnetic resonance spectroscopy analyses demonstrated that urea degradation was mainly mediated by the radical pathway, which in turn was dominated by surface-bound sulfate radicals (SO4•−). Further, reusability experiments confirmed the stability of the material. After three cycles, the degradation efficiency can still reach 86%. Therefore, the conversion of water caltrop-derived biochar into a composite catalytic material provides a novel strategy for value-added utilization of aquatic waste biomass, and it is also a promising alternative for the treatment of urea from swimming pool water.

Research Area(s)

  • Carbon material, Degradation, Peroxymonosulfate (PMS), Radical pathway, Urea

Citation Format(s)

Fe3O4 supported on water caltrop-derived biochar toward peroxymonosulfate activation for urea degradation : the key role of sulfate radical. / Li, Guang; Cao, Xiao-qiang; Meng, Na; Huang, Yi-meng; Wang, Xu-dong; Gao, Yuan-yuan; Li, Xuan; Yang, Ting-shu; Li, Bo-lai; Zhang, Yi-zhen; Lyu, Xian-jun; Liang, Yue.

In: Chemical Engineering Journal, 14.11.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review