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Accelerated hydrolysis method for producing partially degraded polyester microplastic fiber reference materials

Accelerated hydrolysis method for producing partially degraded polyester microplastic fiber reference materials

Kategori
Vitenskapelig artikkel
Sammendrag
Microplastic fibers (MPFs) from textiles significantly contribute to the microplastic (MP) load in many environmental matrices and have been shown to negatively impact the organisms therein. Most fate and effect studies to date rely on pristine reference MP materials that have limited relevance compared with the partially degraded MP particles and fibers typically present in the natural environment. The current study aimed to develop and validate a rapid method to generate environmentally relevant polyester (PET) MPF reference material with controllable levels of degradation. Importantly, the method produced the same degradation products (terephthalic acid (TA) and ethylene glycol (EG)) as those generated during natural UV (sunlight) exposure of PET. Alkaline hydrolysis provided linearly increasing degrees of degraded PET MPFs over just a few hours, with full decomposition into molecular fragments occurring after 3 h. The extent of physical degradation was determined by scanning electron microscopy, whereas chemical degradation was quantified by measuring the production of TA and EG degradation products. The proposed accelerated hydrolysis degradation method is relevant for producing partially degraded PET MPF reference materials for use in fate and effect studies.
Oppdragsgiver
  • Research Council of Norway (RCN) / 312262
  • Research Council of Norway (RCN) / 268404
Språk
Engelsk
Institusjon(er)
  • SINTEF Ocean / Miljø og nye ressurser
  • SINTEF Industri / Materialer og nanoteknologi
  • Norges teknisk-naturvitenskapelige universitet
Dato
30.12.2020
År
2020
Publisert i
Environmental Science and Technology Letters (ES&T Letters)
ISSN
2328-8930
Forlag
American Chemical Society (ACS)
Årgang
8
Hefte nr.
3
Side(r)
250 - 255