AI Revolutionizes Environmental Risk Assessment of Chemicals
The bioconcentration factor (BCF) is a critical measure of chemical accumulation in fish compared to their surrounding water. Until recently, it was believed to be a constant for each chemical, but a groundbreaking study led by Professor Heinz Köhler from the University of Tübingen's Institute of Evolution and Ecology challenges this notion. The research reveals that BCF varies depending on the test concentration, casting doubt on the bioaccumulation data used for EU licensing procedures for over half of the chemicals that potentially accumulate in fish.
This discovery has significant implications, as chemical concentrations in the food chain can affect humans as well. Professor Köhler highlights the potential for massive accumulation in the human body, with harmful effects often only becoming apparent after prolonged exposure.
To address this issue, the research team has developed an AI tool, BCFpro, which enables researchers to assess the bioaccumulating properties of substances with high accuracy. This tool is freely available, and the team's findings are published in the Journal of Hazardous Materials.
The team's work involves evaluating thousands of studies on chemical tests to determine the bioconcentration factor. By using deep learning, an AI machine learning method, they developed a program that can predict experimental data with 90% certainty. This method processes complex datasets and extracts patterns, making it efficient for handling intricate information.
BCFpro can also predict the bioaccumulation of new chemical developments, offering a significant reduction in animal testing. The tool's accuracy in identifying bioaccumulating substances is 90%, but it reveals a concerning aspect: over 60% of substances categorized as non-bioaccumulating were incorrectly identified using the established method. This highlights the importance of conducting chemical tests under environmentally relevant conditions for realistic risk assessment.
The research team emphasizes the need for standardized and reliable categorization of chemicals, making BCFpro freely available to ensure accurate assessments. This development is a significant step forward in ecotoxicological methods, promoting environmental safety and animal welfare.
