Nanopollutants are nanoparticles that have escaped into the environment and can include engineered nanoparticles as well as nanoparticles that are products of degradation ( e.g. nanoplastics) or other processes. As many of these particles are only recently developed or described there is still a lot to learn about where they come from, where they end up and what risks they pose to health and the environment. Offering a wide overview of the most recent research on these emerging contaminants, from the investigation of their sources and fate to the analytical developments for their detection and analysis, this book gives the reader a full picture of the global research on engineered and natural nanoparticles in the environment. Taking a forward-looking perspective with chapters on new nanopollutants, regulatory direction and occurrence in different environmental compartments, this book is a great resource for anyone working in environmental chemistry, nanoscience or environmental regulation. Prof. Joanna Szpunar (F) graduated from the Technical University of Warsaw (Poland), received her PhD and DSc (habilitation) from the University of Warsaw (Poland) and was nominated a professor in 2007. Since 1997 she has been working at the French National Scientific Council (CNRS) laboratory in Pau, France. Her research interests concern bioinorganic speciation and nanoparticle analysis and hyphenated techniques for metallomics. Joanna Szpunar is author or co-author of a book and ca. 175 articles in international journals (H-factor 62, 9693 citations (Google Scholar 25/05/2020)) and more than 50 plenary and invited lectures at international meetings. She is Fellow of the Royal Society of Chemistry and a member of the Advisory Boards of Journal of Analytical Atomic Spectrometry, Metallomics and Separations. Dr. Javier Jiménez-Lamana (M) is a postdoc researcher at University of Pau and Pays de l’Adour (UPPA). Since he started his PhD his research interest has been focused on the analysis of pollutants at the nanoscale in the environment. He has developed analytical methodologies based on Single Particle ICP-MS to study engineered nanoparticles in different environmental and biological matrices. Currently, he is adapting the SP-ICP-MS methodology to the detection and quantification of nanoplastics and their potential role as carriers of heavy metals. He is the author of 25 publications in peer-reviewed journals and 2 book chapters since 2011 with and h-index of 13.