Facilitating non-radical peroxymonosulfate oxidation of tetracyclines driven by struvite crystallization.

In livestock wastewater struvite crystallization, non-radical PMS oxidation of tetracyclines is enhanced, with kobs reaching 1.95–2.15× that of PMS alone.

• Why it matters: Residual tetracyclines from livestock wastewater struvite recovery can promote antibiotic resistance, so improved degradation during phosphorus recovery is needed.
• What they did: The study tested in-situ struvite crystallization with PMS, identifying 1O2 and electron transfer as dominant non-radical pathways, and used electrochemistry plus FT-ICR-MS and fluorescence spectroscopy.
• The result: Optimal Mg:P of 1.0 and pH 9.2–9.8 facilitated 1O2 generation and PMS oxidation, while humic acid inhibited degradation and excess Mg2+ reduced this inhibition.

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