Comparative experimental study of bisphenol A degradation via sulfate radical and electron transfer mechanisms in persulfate-activated advanced oxidation processes
Addressing the growing challenge of water contamination, this study comparatively evaluated a persulfate (PDS) system activated by non-radical nitrogen-doped carbon nanotubes (N-CNTs) versus a PDS system activated by radical-based iron (Fe2+), both used for the degradation of bisphenol A (BPA). The...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-09-01
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| Series: | Water Science and Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674237025000560 |
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| Summary: | Addressing the growing challenge of water contamination, this study comparatively evaluated a persulfate (PDS) system activated by non-radical nitrogen-doped carbon nanotubes (N-CNTs) versus a PDS system activated by radical-based iron (Fe2+), both used for the degradation of bisphenol A (BPA). The N-CNTs/PDS system, driven by the electron transfer mechanism, achieved remarkable 90.9% BPA removal within 30 min at high BPA concentrations, significantly outperforming the Fe2+/PDS system, which attained only 38.9% removal. The N-CNTs/PDS system maintained robust degradation efficiency across a wide range of BPA concentrations and exhibited a high degree of resilience in diverse water matrices. By directly abstracting electrons from BPA molecules, the N-CNTs/PDS system effectively minimised oxidant wastage and mitigated the risk of secondary pollution, ensuring efficient utilisation of active sites on N-CNTs and sustaining a high catalytic rate. The formation of the N-CNTs-PDS∗ complex significantly enhanced BPA degradation and mineralisation, thereby optimising PDS consumption. These findings highlight the unparalleled advantages of the N-CNTs/PDS system in managing complex wastewater, offering a promising and innovative solution for treating complex industrial wastewater and advancing environmental remediation efforts. |
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| ISSN: | 1674-2370 |