Sewer-relevant aging of microplastics drives plastic-class-dependent N2O emissions from denitrifying sludge.
Microplastics (MPs) accumulate in sewer systems and wastewater treatment plants (WWTPs), where they undergo aging processes distinct from photo-oxidation in surface waters. How such sewer-relevant aging impacts denitrification-associated nitrous oxide (N2O) emissions remains unknown. Here, we simulated sewer-relevant a...