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. Author manuscript; available in PMC: 2022 Oct 1.
Published in final edited form as: Chem Eng J. 2021 Oct 1;421(1):10.1016/j.cej.2021.129816. doi: 10.1016/j.cej.2021.129816

Fig. 4.

Fig. 4.

(a): False-color images of membrane filters, each map displaying a polymer type, (A) PE; (B) PP; (C) PS; and (D) PVC. Correctly recognized spiked MPs are denoted 1–10 and additional MPs present in wastewater are denoted by “!”; (b) Combined false-color images of different MPs types; (c) FT-IR spectra of MPs fragments were (A) PVC; (B) PS; (C) PP; and (D) PE [81] (reproduced with permission from ACS).