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B.S., 1984, Chemistry & Mathematics, Georgia College & State University Ph.D., 1989, Physical Organic Chemistry, Emory University U.S. EPA Science Achievement Award in Water Quality. (Awarded jointly by the U.S. EPA and the Society of Environmental Toxicology and Chemistry), 1997; U.S. EPA Science Achievement Award in Chemistry. (Awarded jointly by the U.S. EPA and the American Chemical Society), 2000; U.S. EPA, Bronze Medal, 2000 and 2003; Editorial Board, Rapid Communications in Mass Spectrometry, 2006-present; Honorary Doctorate (Doctor of Letters, honoris causa), Cape Breton University, Sydney, Nova Scotia, Canada, 2006; U.S. EPA, National Exposure Research Laboratory Special Achievement Award (Leader in the Environmental Research Community), 2006; American Chemical Society Award for Creative Advances in Environmental Science & Technology, 2008; Chemist of the Year, Northeast Georgia Section of the American Chemical Society, 2008; Associate Editor, Water Research, 2009-present; Editorial Advisory Board, Environmental Science and Pollution Research, 2009-present; Editorial Advisory Board, Environmental Science & Technology, 2009-present; Scientific Advisory Committee, NIREAS Cyprus International Water Institute, 2010-present; U.S. EPA, Scientific and Technological Achievement Awards, 2013, 2010, 2009, 2004, 2003, 2001, 2000, 1998, 1997; Scientific and Technological Board, European Commission World Joint Programming Initiative (JPI) for ‘Water Challenges for a Changing World’, 2014-present.



Environmental chemistry; formation of drinking water disinfection by-products (DBPs); emerging environmental contaminants; fate of natural organic matter and environmental contaminants in drinking water and wastewater treatment; linking chemistry and toxicology. Introduction: My research focuses mostly on identifying new DBPs in drinking water, determining formation mechanisms, and integrating toxicological characterization with chemical characterization approaches. The overall goal of this research is to solve human health issues surrounding drinking water DBPs. I will also be expanding my work to study and protect ecological health. Background: Drinking water disinfection was a triumph of the 20th Century, allowing the prevention of many waterborne illnesses, such as cholera and typhoid. However, an unintended consequence of killing harmful pathogens in water is the formation of DBPs in drinking water, many of which have been found to be toxic and/or carcinogenic. Human epidemiologic studies conducted in the U.S. and in other countries have shown increase risk for bladder cancer and the potential for early-term miscarriage and birth defects in some locations, and the DBPs responsible for these effects are currently not known. In addition, people can be exposed to DBPs in swimming pools and spas, and there is interest in what chemicals are formed in these scenarios. DBPs are formed when disinfectants (e.g., chlorine, chloramines, ozone, and chlorine dioxide) react with naturally occuring organic matter, bromide, and iodide. They can also form through the reaction of disinfectants with anthropogenic contaminants, such as pharmaceuticals and personal care products, hormones, pesticides, and other contaminants. For example, my group made the recent discovery that compounds used for medical imaging (X-ray contrast media) can react with chlorine or chloramines in drinking water treatment to form iodinated DBPs, which are the most toxic DBPs identified to-date. X-ray contrast media are non-toxic to humans in their parent form, and are excreted within ~24 hr. They subsequently enter a wastewater treatment plant and are very resistant to degradation, such that high levels are released to rivers and streams (up to 100 ppb) and can enter drinking water source waters to form these highly toxic DBPs. This source-to-tap scenario is one of the new research areas of our group, where we are studying the fate of emerging contaminants through wastewater treatment, to drinking water source waters, and transformation in drinking water treatment. Our research is expanding to not only include an emphasis on protecting human health, but also ecological health, as transformation products formed in disinfected wastewater can also adversely impact ecological health. As we understand the formation of these DBPs and transformation products, we can ultimately find ways to remove them or minimize their formation. Experimental approach: We use gas chromatography (GC)/mass spectrometry (MS) and liquid chromatography (LC)/MS techniques to identify and measure DBPs and other transformation products in drinking water and other treated waters. Mass spectrometry is an ideal analytical tool for measuring trace levels of compounds in complex environmental matrices, and we utilize several different ionization modes as well as high resolution-MS. We also use total organic halogen (TOX) analysis and ion chromatography. Current research: My current research involves the X-ray contrast media DBP research mentioned above, along with formation of DBPs in desalination treatment and in swimming pools and spas. I am also investigating the effect of free chlorine contact time on the formation of iodo-DBPs from chloramination and continue to collaborate in a European epidemiologic study of DBPs and adverse birth outcomes. I am also interested in helping to solve more recent issues with skin rashes and other respiratory issues that have been associated with chloraminated water.


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Richardson, S. D., and T. A. Ternes. 2014. Water Analysis: Emerging Contaminants and Current Issues. Anal. Chem., 86: 2813-2848. (Invited biennial review article). Werschkun, B., S. Banerji, O. C. Basurko, M. David, F. Fuhr, S. Gollasch, T. Grummt, M. Haarich, A. N. Jha, S. Kacan, A. Kehrer, J. Linders, E. Mesbahi, D. Pughiuc, S. D. Richardson, B. Schwarz-Schulz, A. Shah, N. Theobald, U. Von Gunten, S. Wieck, and T. Hoefer. 2014. Emerging Risks from Ballast Water Treatment: The Run-Up to the International Ballast Water Management Convention. Chemosphere, 112:256-266. Richardson, S. D., and C. Postigo. 2014. Transformation of Pharmaceuticals During Oxidation/Disinfection Processes in Drinking Water Treatment. J. Haz. Mat., in press (Invited review article). Krasner, S. W., G. Amy, and S. D. Richardson. 2014. Carbonaceous Disinfection By-Products (C-DBPs) of Chlorine, Chloramines, and Chlorine Dioxide, In: Organic By-Products of Concern Produced in Drinking Water Treatment, Suffet, I. H., Quang, D., Bruchet, A., Krasner, S. and Khiari, D. (eds.); Water Research Foundation: Denver, CO, in press. (Invited book chapter). Narotsky, M. G., G. R. Klinefelter, J. M. Goldman, D. S. Best, A. McDonald, L. F. Strader, J. D. Suarez, A. S. Murr, I. Thillainadarajah, E. S. Hunter III, S. D. Richardson, T. F. Speth, R. J. Miltner, J. G. Pressman, L. K. Teuschler, G. E. Rice, V. C. Moser, R. W. Luebke, and J. E. Simmons. 2013. Comprehensive Assessment of a Chlorinated Drinking Water Concentrate in a Rat Multigenerational Reproductive Toxicity Study: U.S. EPA’s Four Lab Study. Environ. Sci. Technol., 2013, 47 (18), 10653–10659. Jeong, C. H., S. Anduri, S. D. Richardson, E. J. Daiber, A. B. McKague, M. J. Nieuwenhuijsen, M. Kogevinas, C. M. Villanueva, E. H. Goslan, W. Luo, L. M. Isabelle, J. F. Pankow, E. D. Wagner, and M. J. Plewa. 2012. The Occurrence and Toxicity of Disinfection By-products in European Drinking Waters: Correlations with the HiWATE Epidemiological Program. Environ. Sci. Technol., 46:12120-12128. Valsania, M. C., F. Fasano, S. D. Richardson, and M. Vincenti. 2012. Investigation of the Degradation of Cresols in the Treatments with Ozone. Water Res., 46, 2795-2804. Narotsky, M. G., J. G. Pressman, R. J. Miltner, T. F. Speth, L. K. Teuscher, G. E. Rice, S. D. Richardson, D. S. Best, A. McDonald, E. S. Hunter, III, and J. E. Simmons. 2012. Developmental Toxicity Evaluations of Whole Mixtures of Disinfection By-Products using Concentrated Drinking Water in Rats: Gestational and Lactational Effects of Sulfate and Sodium. Birth Defects Res. Pt. B, Develop. Reprod. Toxicol., 95 (3): 202-212. Richardson, S. D. 2012. Environmental Mass Spectrometry: Emerging Contaminants and Current Issues. Anal. Chem., 84 (2): 747-778. Duirk, S. E., C. Lindell, C. C. Cornelison, J. Kormos, T. A. Ternes, M. Attene-Ramos, J. Osiol, E. D. Wagner, M. J. Plewa, and S. D. Richardson. 2011. Formation of Toxic Iodinated Disinfection By-Products from Compounds Used in Medical Imaging. Environ. Sci. Technol., 45 (16): 6845-6854. Boyd, J. M., S. E. Hrudey, S. D. Richardson, and X.-F. Li. 2011. Solid Phase Extraction and High Performance Liquid Chromatography Mass Spectrometry Analysis of Nitrosamines in Treated Drinking Water and Wastewater. Trends Anal. Chem., 30 (9): 1410-1421. Richardson, S. D., and T. A. Ternes. 2011. Water Analysis: Emerging Contaminants and Current Issues. Anal. Chem., 83 (12): 4614-4648. Smith, E. M.; M. J. Plewa, C. L. Lindell, S. D. Richardson, and W. A. Mitch. 2010. Comparison of Byproduct Formation in Waters Treated with Chlorine and Iodine: Relevance to Point-of-Use Treatment. Environ. Sci. Technol., 44 (22):8446-8452. Pressman, J. G., S. D. Richardson, T. F. Speth, R. J. Miltner, M. G. Narotsky, E. S. Hunter, III, G. E. Rice, L. E. Teuschler, A. McDonald, S. Parvez, S. K. Krasner, H. S. Weinberg, A. B. McKague, C. J. Parrett, N. Bodin, R. Chinn, C.-F. T. Lee, and J. E. Simmons. Concentration, Chlorination, and Chemical Analysis of Drinking Water Disinfection Byproduct Mixtures Health Effects Research: U.S. EPA’s Four Lab Study. 2010. Environ. Sci. Technol., 44(19): 7184-7192. Richardson, S. D., D. M. DeMarini, M. Kogevinas, P. Fernandez, E. Marco, C. Lourencetti, C. Ballester, D. Heederik, K. Meliefste, A. B. McKague, R. Marcos, L. Font-Ribera, J. O. Grimalt, and C. M. Villaneuva. 2010. What’s in the Pool? A Comprehensive Identification of Disinfection By-Products and Assessment of Mutagenicity of Chlorinated and Brominated Swimming Pool Water. Environ. Health Perspect., 118 (11): 1523-1530. LaKind, J. S., S. D. Richardson, and B. C. Blount. 2010. The Good, the Bad, and the Volatile – Can We Have Both Healthy Pools and Healthy People? Environ. Sci. Technol., 44 (9): 3205-3210. Weisel, C. P., S. D. Richardson, B. Nemery, G. Aggazzotti, E. Baraldi, E. R. Blatchley, III, B. C. Blount, K-H. Carlsen, P. A. Eggleston, F. H. Frimmel, M. Goodman, G. Gordon, S. A. Grinshpun, D. Heederik, M. Kogevinas, J. S. LaKind, M. J. Nieuwenhuijsen, F. C. Piper, S. A. Sattar. 2009. Childhood Asthma and Environmental Exposures at Swimming Pools: State of the Science and Research Recommendations. Environ. Health Perspect., 117 (4): 500-507. Richardson, S. D., F. Fasano, J. J. Ellington, F. G. Crumley, K. M. Buettner, J. J. Evans, B. C. Blount, L. K. Silva, T. J. Waite, G. W. Luther, A. B. McKague, R. J. Miltner, E. D. Wagner, and M. J. Plewa. 2008. Occurrence and Mammalian Cell Toxicity of Iodinated Disinfection Byproducts in Drinking Water. Environ. Sci. Technol., 42 (22): 8330-8338. Plewa, M. J., M. G. Muellner, S. D. Richardson, F. Fasano, K. M. Buettner, Y.-T. Woo, A. B. McKague, and E. D. Wagner. 2008. Occurrence, Synthesis, and Genotoxicity of Haloacetamides: An Emerging Class of Nitrogenous Drinking Water Disinfection Byproducts. Environ. Sci. Technol., 42 (3), 955-961.