Targeting microplastic detoxification mechanisms for urban soil health

Healthy soil is essential for human well-being, providing critical ecosystem services such as food production and water purification. However, anthropogenic activities have led to microplastic (MP) contamination in soils, posing significant risks to soil health, functionality, and food safety. Despite its severity, the presence and impacts of MP in soil remain largely unexplored. This project focuses on Viennese urban soils, particularly those used for food production in community gardens, as well as nearby forest soils, which will serve as a reference for MP contamination. The project will characterize the types and levels of MP contamination and assess its toxicological impacts on soil health, plant performance, and the soil microbiome, a key driver of ecosystem processes and MP degradation potential. Through ecotoxicological tests and controlled pot experiments, the project will investigate the mechanisms of MP toxicity at the soil-plant interface and explore the use of soil amendments to immobilize MP, reduce its toxicity, and enhance degradation processes. This interdisciplinary effort, integrating soil science, material science, and ecotoxicology, aims to develop a mechanistic understanding of MP toxicity and mitigation strategies. Furthermore, it seeks to promote societal engagement by involving stakeholders, including gardeners, in the investigation process. The project will disseminate findings through workshops and open-access data repositories, fostering public awareness about MP contamination and solutions for sustainable soil management. Ultimately, the outcomes will provide actionable strategies to improve soil health and mitigate the environmental and human risks associated with MP contamination in urban contexts.