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September 14, 2026Journal of Water Process EngineeringOpen Access

Performance and mechanism of bicarbonate-assisted heterogeneous peroxymonosulfate activation with CoMn2O4 catalyst toward contaminant remediation

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Authors

QFQing FuQZQiqi ZhuYLYao Liu

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Overview

Experimental study demonstrates bicarbonate-regulated peroxymonosulfate activation with CoMn2O4 efficiently degrades organic contaminants, indicating enhanced stability for water treatment.

Key Points

  • To investigate whether bicarbonate supplementation can stabilize pH and suppress metal leaching during CoMn2O4-catalyzed peroxymonosulfate oxidation of organic pollutants.
  • Supplemented 5 mmol/L bicarbonate into a heterogeneous CoMn2O4/peroxymonosulfate (PMS) catalytic oxidation system treating Acid Orange 7 (AO7).
  • Characterized dominant reactive oxygen species and degradation pathways using electron paramagnetic resonance (EPR), radical quenching assays, and density functional theory (DFT) calculations.
  • Evaluated catalyst operational durability over repeated runs and 48 hours of continuous operation, alongside effluent phytotoxicity via seed germination tests.
  • Incorporating 5 mmol/L bicarbonate stabilized the aqueous reaction pH at 7.5 ± 0.2 and suppressed cobalt and manganese leaching while maintaining catalytic activity.
  • Hydroxyl and sulfate radicals served as the primary reactive species driving >97% contaminant degradation in real water matrices over 48 hours of continuous treatment.
  • Treated wastewater exhibited substantially diminished phytotoxicity, achieving a seed germination index exceeding 80%.

Cite This Study

Fu et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b3fc0926e14a848b36bdhttps://doi.org/10.1016/j.jwpe.2026.110932
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Also Consider

Synapse has enriched one closely related paper. Consider it for comparative context:

  1. 1Identifying the Nonradical Mechanism in the Peroxymonosulfate Activation Process: Singlet Oxygenation Versus Mediated Electron Transfer2018 · 1,195 citations