John Bowden John A. Bowden, Ph.D., is a professor in the Department of Physiological Science at the College of Veterinary Medicine at the University of Florida. Dr. Bowden earned his Ph.D. in Analytical Chemistry at the University of Florida in 2008. His research interests include employing novel mass spectrometric methods at the chem/bio interface, and the fields of environmental chemistry, endocrine disruption, analytical toxicology, and exposure science. Technologies Waste Treatment for Separating PFAS from Landfill Leachate