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Regulating nonradicals generation through peroxymonosulfate activation via localized dipole to enhance wastewater biodegradability

Author

Listed:
  • Zhiyong Zhao

    (Nankai University)

  • Gaohua Yang

    (Nankai University)

  • Pengfei Wang

    (Nankai University
    Hebei University of Technology)

  • Shuai Yue

    (Nankai University)

  • Mengxue Yang

    (Nankai University)

  • Tao Zhang

    (Nankai University)

  • Sihui Zhan

    (Nankai University
    Tianjin University)

Abstract

It is still greatly desirable to activate peroxymonosulfate (PMS) forming nonradicals for the removal of electron-rich contaminants in complex water matrices. However, achieving this on heterogeneous metal-based catalysts with uniform electron distribution remains challenging due to the asymmetric structure of PMS molecules (H-O-O-SO3-). Here, inspired by the dipole effect, we design a Co-doped ZnO catalyst (ZOC) to break charge symmetry at active sites and enhance nonradicals generation. The high charge density at Co sites facilitates two-electron transfer, promoting O-O and O-H bond cleavage to form high-valent cobalt-oxo (CoIV=O), while positively polarized Zn sites drive PMS self-decomposition to generate singlet oxygen (1O2). As a result, the synergistic system of 1O2 and CoIV = O results in a k-value of 73.93 min⁻¹ M⁻¹ for aniline (AN) degradation, 189.6 times higher than ZnO/PMS (ZO/PMS), and also shows a high selectivity for electron-rich new pollutants. The practicality of this outstanding nonradicals system is confirmed by a significant increase in biochemical oxygen demand/chemical oxygen demand (BOD/COD) of the mixed wastewater to over 0.55 in the air-lifting internal circulating reactor. This study offers a structural regulation for controlling catalytic functionality and provides general guidelines for designing Fenton-like reactors to enhance wastewater biodegradability.

Suggested Citation

  • Zhiyong Zhao & Gaohua Yang & Pengfei Wang & Shuai Yue & Mengxue Yang & Tao Zhang & Sihui Zhan, 2025. "Regulating nonradicals generation through peroxymonosulfate activation via localized dipole to enhance wastewater biodegradability," Nature Communications, Nature, vol. 16(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60964-2
    DOI: 10.1038/s41467-025-60964-2
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    References listed on IDEAS

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