IHSS&IWA26 / BRNO / CZECHIA / 23–28 August 2026 BOOK OF ABSTRACTS 242 Poster Session / Environment, Agriculture, and Forestry Hall A P4.16 SOM–Contaminant Interactions: Analysis of Migration Processes under the Influence of Exogenous Organic Matter Aleksandra Ukalska-Jaruga1, Joanna Ciepiel1, Agata Bober1, Edit Kaszab2, Julianna Kobolak2, Lisa Paruch3, Alper Elçi4, Melinda Váci5, Ana Cristina Rodrigues6, Rekha Pich Ollé7. 1 Institute of Soil Science and Plant Cultivation State Research Institute, Pulawy, PL 2 Hungarian University of Agriculture and Life Sciences: Gödöllő, HU 3 Norwegian Institute of Bioeconomy Research: Ås, NO 4 Dokuz Eylul University: Izmir, TR 5 Tisza Iroda, Middle Tisza District Water Directorate, Szolnok, HU 6 Instituto Politécnico de Coimbra: Coimbra, PT 7 BETA Technological Center, VIC, Universitat Central de Catalunya, ES The recirculation of animal byproducts, such as slurry and manure, is a cornerstone of nutrient cycling aligned with the EU Circular Economy Action Plan and the European Green Deal. These practices enhance carbon sequestration and soil organic matter (SOM) stocks, supporting the EU Soil Strategy for 2030. However, this application introduces risks of transferring anthropogenic contaminants, including veterinary medicinal products from intensive livestock production and pesticides accumulated via the food chain. Understanding the environmental fate of these compounds is critical, as SOM acts as both a primary fertility factor and a predominant sorbent. The sorption, desorption, and bioavailability of contaminants are strictly governed by SOM structure and transformation, directly influencing their mobility within the soil profile. The BioTreated project addresses these challenges by conducting comprehensive analyses of the interactions between enriched SOM fractions and contaminant dynamics. This research is essential for assessing the ecotoxicological safety of modern agrotechnical practices and ensuring compliance with the EU Zero Pollution Action Plan. To reflect real-world environmental complexity, the study utilizes rigorous field experiments to precisely determine the impact of external variables on the soil system. Acknowledgement The project BioTreatED (Water4All2023-334) received funding from NKFIH (Hungary), RCN (Norway), FCT (Portugal), AEI (Spain), NCN (Poland), TÜBITAK (Türkiye), and the European Union’s Horizon Europe Programme (Grant Agreement n°101060874).
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