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Microplastic Deposition Flux in Vienna

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Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Agnieszka Kupc, Silvia Bucci, Fabiana Corami, Fabiana Corami, Fabiana Corami, Silvia Bucci, Fabiana Corami, Fabiana Corami, Fabiana Corami, Silvia Bucci, Hannah Brown, Beatrice Rosso, Silvia Bucci, Fabiana Corami, Fabiana Corami, Silvia Bucci, Fabiana Corami, Thilo Hofmann Fabiana Corami, Thilo Hofmann Silvia Bucci, Beatrice Rosso, Fabiana Corami, Fabiana Corami, Fabiana Corami, Beatrice Rosso, Beatrice Rosso, Thilo Hofmann Thilo Hofmann Thilo Hofmann Fabiana Corami, Fabiana Corami, Silvia Bucci, Silvia Bucci, Fabiana Corami, Silvia Bucci, Silvia Bucci, Silvia Bucci, Fabiana Corami, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Fabiana Corami, Fabiana Corami, Thilo Hofmann Thilo Hofmann Silvia Bucci, Thilo Hofmann Thilo Hofmann Thilo Hofmann Beatrice Rosso, Andreas Stohl, Thilo Hofmann Andreas Stohl, Beatrice Rosso, Silvia Bucci, Silvia Bucci, Silvia Bucci, Beatrice Rosso, Beatrice Rosso, Andreas Stohl, Thilo Hofmann Thilo Hofmann Thilo Hofmann Silvia Bucci, Hannah Brown, Silvia Bucci, Beatrice Rosso, Beatrice Rosso, Thilo Hofmann Silvia Bucci, Fabiana Corami, Silvia Bucci, Fabiana Corami, Silvia Bucci, Fabiana Corami, Fabiana Corami, Fabiana Corami, Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Manuel Schachinger, Fabiana Corami, Fabiana Corami, Thilo Hofmann Thilo Hofmann Fabiana Corami, Thilo Hofmann Hannah Brown, Thilo Hofmann Thilo Hofmann Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Beatrice Rosso, Thilo Hofmann Silvia Bucci, Fabiana Corami, Bernadett Weinzierl, Bernadett Weinzierl, Thilo Hofmann Bernadett Weinzierl, Fabiana Corami, Thilo Hofmann Bernadett Weinzierl, Bernadett Weinzierl, Thilo Hofmann Thilo Hofmann Silvia Bucci, Fabiana Corami, Thilo Hofmann Thilo Hofmann Agnieszka Kupc, Thilo Hofmann Fabiana Corami, Andreas Stohl, Bernadett Weinzierl, Thilo Hofmann Fabiana Corami, Andreas Stohl, Fabiana Corami, Fabiana Corami, Thilo Hofmann Thilo Hofmann Thilo Hofmann Thilo Hofmann Bernadett Weinzierl, Fabiana Corami, Beatrice Rosso, Fabiana Corami, Thilo Hofmann Silvia Bucci, Thilo Hofmann Thilo Hofmann Silvia Bucci, Silvia Bucci, Fabiana Corami, Thilo Hofmann Silvia Bucci, Fabiana Corami, Fabiana Corami, Thilo Hofmann

Summary

Scientists measured tiny plastic particles falling from the air in Vienna and found that most came from car tire wear rather than clothing fibers like previous studies suggested. These microscopic plastic pieces are constantly raining down on cities, likely coming from local traffic and potentially traveling long distances through the atmosphere. This matters because we're breathing this plastic-contaminated air daily, though more research is needed to understand the full health effects.

Microplastic Deposition Flux in ViennaAtmospheric microplastic deposition presents an important pathway for plastic pollution in all ecosystems, yet quantitative data on atmospheric deposition fluxes in urban areas remain sparse. This study quantifies atmospheric microplastic deposition fluxes in Vienna using a combined observational and modelling approach. Specifically, atmospheric deposition is measured using a wet and dry passive sampler, allowing separate calculations of wet and dry deposition fluxes. Samples are collected daily over one-week campaigns during winter, spring, and autumn to enable the calculation of daily deposition fluxes and evaluation of seasonal variability. These samples are processed using a recently developed technique called oleo extraction and are then analysed via Fourier transform infrared spectroscopy and microscopy (Micro-FT-IR) for particle identification and classification. Additionally, wind speed and direction are used in correlation analyses against deposition to assess the influence of local sources, whilst FLEXPART Lagrangian dispersion modelling is applied to evaluate the contribution of long-range atmospheric transport. Preliminary results from the pilot study and autumn sampling campaign have confirmed the identification of microplastic particles in the deposition fluxes (e.g. 40-50 µm fragments of polypropylene and polyvinyl chloride). Alongside this, the preliminary analysis shows in several samples a dominant fraction of dark particles below 10µm in diameter, occasionally detected by the Micro-FT-IR as rubber. Due to their size, morphology and colour, we suspect them to be tire wear particles. This would confirm the dominant role of traffic related sources on the microplastic particles detected in urban air. In contrast to previous studies, the analysis of the first collected samples shows a very low percentage of plastic microfibers. These findings highlight the importance of gaining microplastic deposition fluxes in urban environments, along with their dominant source processes.

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