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Unveiling Mixed Microplastics and Organic Contaminants of Different Classes Affection: Dual-Phase Partitioning and Biofilm-Switch Mechanisms Dictate the Fate of Biodegradation

Environmental Science & Technology 2026

Summary

Researchers found that microplastics regulate the biodegradation of co-occurring organic contaminants in a dose-dependent way—enhancing breakdown of sulfonamide antibiotics at environmentally realistic concentrations, but at high doses, polypropylene particles become potent sinks that retard triclosan degradation while accelerating their own weathering.

for SMX. Overall, MPs act as conditional regulators: enhancing biodegradation at realistic doses, but at high concentrations, PP-10 μm becomes a potent sink and microreactor, retarding TCS degradation yet accelerating its own weathering.

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