Fig. 2.

Surgical face mask characterisation and its behaviour in the aquatic matrix. A) FTIR spectra of the different parts of the surgical face mask and different layers. B) Nominal sizes of fragments from PDM and HDM treatments. C) Behaviour of both size fragments of face mask in zebrafish water over 72 h (time between zebrafish water changes). D) Spectrum of the organic substances released into the water from the PDM and HDM treatments. E) Concentration of different elements present in the surgical face masks. For some elements the concentration was zero. F) Inorganic elements released into water from PDM and HDM treatments.