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Aerosolization of micro- and nanoplastics via sea spray: Investigating the role of polymer type, size, and concentration, and potential implications for human exposure Lambert, S.; Vercauteren, M.; Catarino, A.I.; Li, Y.; Van Landuyt, J.; Boon, N.; Everaert, G.; De Rijcke, M.; Janssen, C.; Asselman, J. (2024). Aerosolization of micro- and nanoplastics via sea spray: Investigating the role of polymer type, size, and concentration, and potential implications for human exposure. Environ. Pollut. 351: 124105. https://dx.doi.org/10.1016/j.envpol.2024.124105 In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491; e-ISSN 1873-6424

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Beschikbaar in	Auteurs
VLIZ: Non-open access 401390 [ aanvragen ] VLIZ: Open Marine Archive 400643 [ download pdf ]
Documenttype: Preprint

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Trefwoord

Marien/Kust

Author keywords

microplastics, nanoplastics, sea spray aerosols, atmosphere, human exposure, inhalation

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Auteurs		Top
Lambert, S. Vercauteren, M. Catarino, A.I. Li, Y.	Van Landuyt, J. Boon, N. Everaert, G.	De Rijcke, M. Janssen, C. Asselman, J.

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Abstract

Micro- and nanoplastics (MNPs) can enter the atmosphere via sea spray aerosols (SSAs), but the effects of plastic characteristics on the aerosolization process are unclear. Furthermore, the importance of the transport of MNPs via these SSAs as a possible new exposure route for human health remains unknown. The aim of this study was two-fold: (1) to examine if a selection of factors affects aerosolization processes of MNPs, and (2) to estimate human exposure to MNPs via aerosols inhalation.A laboratory-based bubble bursting mechanism, simulating the aerosolization process at sea, was used to investigate the influence of MNP as well as seawater characteristics. To determine the potential human exposure to microplastics via inhalation of SSAs, the results of the laboratory experiments were extrapolated to the field based on sea surface microplastic concentrations and the volume of inhaled aerosols.Enrichment seemed to be influenced by MNP size, concentration and polymer type. With higher enrichment for smaller particles and denser polymers. Experiments with different concentrations showed a larger range of variability but nonetheless lower concentrations seemed to result in higher enrichment, presumably due to lower aggregation. In addition to the MNP characteristics, the type of seawater used seemed to influence the aerosolization process. Our human exposure estimate to microplastic via inhalation of sea spray aerosols shows that in comparison with reported inhaled concentrations in urban and indoor environments, this exposure route seems negligible for microplastics. Following the business-as-usual scenario on plastic production, the daily plastic inhalation in coastal areas in 2100 is estimated to increase but remain far below 1 particle per day.This study shows that aerosolization of MNPs is a new plastic transport pathway to be considered, but in terms of human exposure it seems negligible compared to other more important sources of MNPs, based on current reported environmental concentrations.

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