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<p>The catalytic degradation of phenol via persulfate oxidation was systematically investigated using a sol–gel method with synthesized solid catalysts. The catalyst prepared with a cobalt-iron molar ratio of 1:2 demonstrated optimal performance for phenol wastewater treatment after calcination at 600℃ for 2&#xa0;h. A comprehensive evaluation of operational parameters affecting treatment efficiency in the heterogeneous catalyst-activated persulfate system revealed that phenol removal efficiency reached 93.97% with concurrent COD reduction of 64.28% after 90&#xa0;min under optimized conditions. After 7 cycles of catalyst recycling, the phenol removal efficiency only decreased by 10.32%. The combination of transition metals in this study produced a synthesized cobalt(II) ferrate catalyst exhibiting enhanced purity and superior catalytic activity compared to conventional materials. In the heterogeneous activated persulfate system, phenol degradation was primarily attributed to the strong oxidative capacity of SO<sub>4</sub><sup>•−</sup> generated through catalytic activation. Under alkaline conditions, phenol oxidation occurred through a dual-radical mechanism involving both SO<sub>4</sub><sup>•−</sup> and ·OH species.</p>

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Research On the Treatment of Phenol Wastewater By Persulfate Activation Based On Heterogeneous Catalyst CoFe2O4

  • 期刊论文

  • 发表日期：

    2025年7月19日

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  • Fuchen Ban,
  • Jingyi Su,
  • Xueting Zheng,
  • Yu Wei,
  • Ao Xiao

摘要

The catalytic degradation of phenol via persulfate oxidation was systematically investigated using a sol–gel method with synthesized solid catalysts. The catalyst prepared with a cobalt-iron molar ratio of 1:2 demonstrated optimal performance for phenol wastewater treatment after calcination at 600℃ for 2 h. A comprehensive evaluation of operational parameters affecting treatment efficiency in the heterogeneous catalyst-activated persulfate system revealed that phenol removal efficiency reached 93.97% with concurrent COD reduction of 64.28% after 90 min under optimized conditions. After 7 cycles of catalyst recycling, the phenol removal efficiency only decreased by 10.32%. The combination of transition metals in this study produced a synthesized cobalt(II) ferrate catalyst exhibiting enhanced purity and superior catalytic activity compared to conventional materials. In the heterogeneous activated persulfate system, phenol degradation was primarily attributed to the strong oxidative capacity of SO4•− generated through catalytic activation. Under alkaline conditions, phenol oxidation occurred through a dual-radical mechanism involving both SO4•− and ·OH species.