Fig. 3
From: Characterization of nanoplastics and small-sized microplastics in sewage treatment
Representative Raman spectra of confirmed plastic particles (500–2000 nm size range) recovered from the study in treated sewage effluent. Spectra shown are baseline-corrected and matched against the ST Japan 6.1 Raman spectral database. Identified polymers and their corresponding Hit Quality Index (HQI) values are A1: polyethylene (HQI: 84.77), A2: polytetrafluoroethylene (HQI: 87.92), A3: polystyrene (HQI: 91.63), A4: polypropylene (HQI: 87.78), A5–A6: nylon (HQI: 96.66), A7-A9: unidentified, showing bands from organic substances.
