Fig. 5
From: Microplastic extraction protocols can impact the polymer structure
Properties of tire rubber before and after Fenton and Basic Piranha oxidation. (5.1) SEM images, (5.2) FT-IR spectra, (5.3) particle size distribution. BP: oxidation with Basic Piranha. Fenton: oxidation using the Fenton protocol. The tire particles showed changes in their silicon dioxide content after Fenton oxidation and the particle sizes increased after both Fenton and Basic Piranha oxidation