BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT SUMMARY:Hach Lecture: Identifying Important DBP Forcing Factors of Toxicity in Drinking Water and Capturing a More Complete Picture of PFAS LOCATION:Chemistry A101 TZID:America/Denver DTSTART:20250430T160000 UID:2026-05-19-14-51-44@natsci.colostate.edu DTSTAMP:20260519T145144 Description:About the Seminar:\n\nDisinfection by-products (DBPs) and per- and polyfluorinated alkyl substances (PFAS) are two high profile contamina nts of concern in drinking water.  Several DBPs are currently regulated b y the U.S. EPA and others are being considered.  EPA also recently announ ced its new regulation for 6 PFAS in drinking water.  Part 1 of this semi nar will detail results from a recent study to identify important DBP forc ing factors of toxicity in drinking water\, with promising strategies to r emove them.  Part 2 will detail our development of two new Total Organic Fluorine (TOF) methods to more comprehensively capture PFAS\, as well as t he application of one of these new methods to map PFAS hotspots in South C arolina.  These combustion ion chromatography methods report the lowest d etection limits to-date (0.1 µg/L and 0.3 µg/L) for extractable organic fluorine and adsorbable organic fluorine methods\, respectively\, as well as higher recoveries for a larger number of PFAS compounds (43)\, includin g legacy PFAS and new PFAS replacements.  Using these new TOF methods\, s ubstantially higher TOF values were measured in industrial wastewater\, ri ver water\, and air samples compared to liquid chromatography-mass spectro metry (LC-MS)\, demonstrating how TOF methods provided a more comprehensiv e measurement of the total PFAS present\, capturing known and unknown orga nic fluorine.\n\n \;\n\nAbout the Speaker:\n\nDr. Susan Richardson is the Arthur Sease Williams Professor of Chemistry at the University of Sout h Carolina and was formerly at the U.S. EPA for many years.  Her research surrounds the study of emerging contaminants in water.  She is a member of the National Academy of Engineering (2024)\, Executive Editor and Assoc iate Editor for Environmental Science &\; Technology\, past President o f the American Society for Mass Spectrometry (2020-2022)\, and received th e American Chemical Society (ACS) Award for Creative Advancements in Envir onmental Science &\; Technology (2008)\, an Honorary Doctorate from Cap e Breton University (2006)\, an AAAS Fellow (2019)\, an ACS Fellow (2016)\ , the Herty Medal (2020)\, the Southern Chemist Award (2020)\, the Walter J. Weber\, Jr. AEESP Frontier in Research Award (2021)\, and the Analytica l Scientist Power List (2024\, 2023\, 2021\, and 2019).  Over her career\ , she has published 214 articles\, given 395 invited presentations and sem inars (including 78 plenaries/keynotes) and 198 contributed presentations.   She has a Ph.D. in Chemistry from Emory University and a B.S. in Chemis try &\; Mathematics from Georgia College &\; State University. 4:00 pm END:VEVENT END:VCALENDAR