About Me





Curriculum Vita


About Dr. Johnson

I earned my B.S. in Environmental Toxicology from the University of California Davis in 1992 and went on to earn my Ph.D. in Environmental Toxicology with an emphasis in Analytical Toxicology from Clemson University in 1996.  Once again traveling across the country, I had a one year Post-Doc at Washington State University.  I joined Southern Illinois University Edwardsville in the fall of 1997.  I maintain a fairly active research group comprised of both Graduate and Undergraduate students.  On occasion I have had high school students also work in the laboratory during the summer.


My current research interests include:  Use of critical body residues in ecological risk assessments in lieu of standardized toxicity data; Development of a novel extraction techniques for POPs in turtle blood along the Tennessee River over a five year period and with five different species; Use of turtle blood as a biomonitoring technique for pharmaceuticals and some persistent organic pollutants along the Illinois River; Pharmaceuticals in water samples, such as determining their: levels, removal strategies, and toxicity; levels in surface waters along the Illinois River; removal efficiencies in three different waste water processing treatments; aquatic toxicity testing of individual, and mixtures thereof, pharmaceuticals found in both of the above studies; and lastly insecticide exposure analysis in wildlife (and their prey items).