Sorption behavior of real microplastics (MPs): Insights for organic micropollutants adsorption on a large set of well-characterized MPs

The Science of the Total Environment
Mohamed AteiaTanju Karanfil

Abstract

Microplastics (MPs) have been recognized as transport vectors for micropollutants in the natural water environment and the food web; therefore, the sorption behavior of contaminant on MPs has recently gained an increased attention. However, a consensus has not yet been reached and information about the adsorption of water contaminants on real MPs remains elusive. Herein, we raise the question of "Should we continue using pure polymers as surrogates for real MPs?" This first systematic study compared the adsorption of multiple micropollutants (i.e. a pesticide, a pharmaceutical, and perfluoroalkyl substances (PFAS)) on a large set of MPs (i.e. 20 well-characterized MPs) and kaolin. Material characterizations results showed various physicochemical and compositional differences between real and pure MPs. Pure polymers had lower normalized uptake values than real MPs in most cases. This was attributed to the surface roughness and/or the presence of fillers (e.g. talc and glass fiber) in real samples. Further, preloaded MPs with natural organic matter (NOM) showed an increased uptake of micropollutants due to forming a complex with NOM and/or co-sorption. These findings indicate that employing real MPs in research studies is critica...Continue Reading

References

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Mar 17, 2019·Environmental Toxicology and Pharmacology·Chibuisi Gideon Alimba, Caterina Faggio

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Citations

Nov 8, 2020·Journal of Hazardous Materials·Chunhui WangBaoshan Xing
Dec 15, 2020·The Science of the Total Environment·Fernando G TorresGabriel E De-la-Torre
May 20, 2021·Environmental Science & Technology·Geetika BhagwatThava Palanisami
May 25, 2021·The Science of the Total Environment·Andrey Ethan RubinInes Zucker
Jun 22, 2021·Environmental Science & Technology·Geetika BhagwatThava Palanisami
Jul 23, 2021·Environmental Science & Technology·Amit Kumar SarkarInes Zucker

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