Katie Marjanovic
Katie (Harding) Marjanovic, Ph.D.
Senior Associate
Environmental & Earth Sciences
  • Orange County

Dr. Marjanovic is an environmental engineer and microbiologist with a background in the fate and transport of contaminants in soil and groundwater. She specializes in the environmental chemistry and biotransformation of halogenated organic compounds such as poly- and perfluoroalkyl substances (PFASs) and chlorinated solvents. She has experience in the use of compound-specific isotope analysis (CSIA) for assessing contaminant fate and degradation, as well as in the characterization and monitoring of microbial communities that biodegrade trichloroethene (TCE).

During her graduate work, Dr. Marjanovic characterized the aerobic biotransformation of fluorinated surfactants present in aqueous film-forming foam (AFFF). She elucidated the transformation pathways in native soil microbial communities and described novel fluorosurfactant compounds using advanced mass spectrometry techniques. She also characterized the effects of AFFF on TCE bioremediation in anaerobic microbial cultures and assessed the impacts of various AFFF constituents on microbial growth and activity. Additionally, Dr. Marjanovic conducted research on the use of stable carbon isotope fractionation as a tool to quantify TCE biodegradation under changing environmental and growth conditions. 

CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Environmental Engineering, University of California, Berkeley, 2014
  • M.S.E., Environmental Engineering, University of Michigan, Ann Arbor, 2007
  • B.S.E., Civil and Environmental Engineering, University of Michigan, Ann Arbor, 2006
  • Elizabeth Pigford College of Engineering Fellowship, 2014

Publications

Harding-Marjanovic KC, Yi S, Weathers TS, Sharp JO, Sedlak DL, Alvarez-Cohen L. Effects of aqueous film-forming foams (AFFFs) on trichloroethene (TCE) dechlorination by a Dehalococcoides mccartyi-containing microbial community. Environmental Science and Technology, 2016; 50(7): 3352-3361.

Weathers TS, Harding-Marjanovic KC, Higgins CP, Alvarez-Cohen L, Sharp JO. Perfluoroalkyl acids inhibit reductive dechlorination of trichloroethene by repressing Dehalococcoides. Environmental Science and Technology, 2016; 50(1): 240–248.

Harding-Marjanovic KC, Houtz EF, Yi S, Field JA, Sedlak DL, Alvarez-Cohen L. Aerobic biotransformation of fluorotelomer thioether amido sulfonate (Lodyne) in AFFF-amended microcosms. Environmental Science and Technology, 2015; 49(13): 7666–7674.

Harding KC, Lee PKH, Bill M, Buscheck TE, Conrad ME, Alvarez-Cohen L. Effects of varying growth conditions on stable carbon isotope fractionation of trichloroethene (TCE) by tceA-containing Dehalococcoides mccartyi strains. Environmental Science and Technology, 2013; 47(21):12342–12350.

Men Y, Lee PKH, Harding KC, Alvarez-Cohen L. Characterization of four TCE-dechlorinating microbial enrichments grown with different cobalamin stress and methanogenic conditions. Applied Microbiology and Biotechnology 2013; 97 (14):6439–6450.

Presentations

Harding KC, Houtz EH, Yi S, Sedlak DL, Alvarez-Cohen L. Biotransformation of fluorotelomer thioether amido sulfonate (Lodyne) in AFFF. American Chemical Society National Meeting, San Diego, CA, March 13-15, 2016.

Harding-Marjanovic KC, Yi S, Weathers T, Sharp JO, Sedlak DL, Alvarez-Cohen L. Effects of AFFF on TCE dechlorination by a Dehalococcoides enrichment culture. FLUOROS meeting, Golden, CO, July 12-14, 2015.

Harding KC, Houtz EH, Yi S, Sedlak DL, Alvarez-Cohen L. Aerobic biotransformation of fluorotelomer thioamido sulfonate (Lodyne™) in AFFF-amended microcosms. American Chemical Society National Meeting, San Francisco, CA, August 10, 2014.

Harding KC, Houtz EH, Yi S, Sedlak DL, Alvarez-Cohen L. Aerobic biotransformation of fluorotelomer thioamido sulfonate (Lodyne™) in AFFF. California Groundwater Resources Association Conference, Concord, CA, February 4, 2014. 2nd place student winner.

Harding KC, Houtz EH, Yi S, Sedlak DL, Alvarez-Cohen L. Aerobic biotransformation of 4:2, 6:2, and 8:2 fluorotelomer thioamido sulfonate produces C4 to C8 perfluorocarboxylates. RemTEC Summit, Westminster, CO, March 4, 2013. 3rd place student winner.

Harding KC, Buscheck T, Alvarez-Cohen L. The isotope fractionation of TCE by Dehalococcoides under a variety of growth conditions and implications for field isotope data. Battelle, Monterey, CA, May 21, 2012.

Harding KC, Bill M, Conrad M, Alvarez-Cohen L. Stable carbon isotope fractionation by tceA-containing Dehalococcoides under various growth conditions. American Society for Microbiology General Meeting, New Orleans, LA, May 21, 2011.


CREDENTIALS & PROFESSIONAL HONORS

  • Ph.D., Environmental Engineering, University of California, Berkeley, 2014
  • M.S.E., Environmental Engineering, University of Michigan, Ann Arbor, 2007
  • B.S.E., Civil and Environmental Engineering, University of Michigan, Ann Arbor, 2006
  • Elizabeth Pigford College of Engineering Fellowship, 2014