He is a trained analytical/environmental chemists and his research is largely centered on aquatic biogeochemistry. His lab’s interest is in characterizing complex dissolved organic matter in natural and engineered systems using modern analytical approaches such as ultrahigh resolution mass spectrometry, and optical properties characterization of chromophoric DOM (CDOM). He also has developed a unique photo-degradation system and he was awarded for this development the Honorable Mentioning to the Masao Horiba Award in Kyoto in 2017. Furthermore, he has applied modern analytical tools to evaluate disinfection by-products (DBPs) and discovered several hundred new DBPs in recent years. Dr. Gonsior has published over 40 peer reviewed publications in highly ranked journals and was a featured scientist in the award-winning documentary "A Plastic Ocean".