Ian Cousins

Professor Ian Cousins is a leading researcher in the Department of Environmental Science at Stockholm University, specializing in the study of persistent organic pollutants, particularly per- and polyfluoroalkyl substances (PFAS). With over 200 peer-reviewed publications and recognition as a Highly Cited Researcher in 2018 and 2020, his work has significantly influenced environmental policy and scientific understanding of chemical pollution.

• BSc (Hons) in Chemistry, University of York (1989)
• Master's in Environmental Management, University of Surrey (1991)
• PhD in Environmental Science, Lancaster University (1998)

Prof. Cousins' research focuses on the sources, transport, fate, and exposure pathways of contaminants in the environment, with particular emphasis on PFAS. His work combines experimental and modeling approaches to investigate how these persistent chemicals move through ecosystems, with recent studies examining sea spray aerosol transport of PFAS and their global distribution. His research has contributed to understanding PFAS as a planetary boundary issue, demonstrating that environmental contamination by these substances has exceeded safe operating limits.

Prof. Cousins' extensive publication record shows a clear trend toward addressing the complex challenges of PFAS pollution, including their environmental behavior, risk assessment methodologies, regulatory frameworks, and the application of the essential-use concept for phasing out non-essential PFAS applications. His work spans fundamental environmental chemistry to policy-relevant research that has directly influenced European environmental decision-making.

• Highly Cited Researcher (2018, 2020)
• Listed among 30 EU politicians and professionals with greatest impact on European environmental policy (2023)
• Associate Editor of Environmental Science and Technology (2020-present)
• Associate Editor of Environmental Au (2021-present)

Prof. Cousins actively supervises master's students focusing on organic pollutants and has coordinated major research projects including PERFORCE3, a Europe-wide doctoral training program on PFAS, and ZeroPM, targeting PFAS and persistent, mobile substances. His research has been supported by multiple European Union Horizon 2020 grants, reflecting the significance and impact of his work on global environmental challenges.

He leads a research group that works closely with analytical chemists to better understand the behavior of PFAS and other contaminants, contributing to the development of evidence-based approaches for managing chemical pollution and protecting environmental and human health.