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Personal profile

Research Interests

Professor Gray's areas of expertise are environmental catalysis and physicochemical processes in natural and engineered environmental systems with particular focus on energy and urban sustainability applications. She studies the synthesis, characterization and performance of photo-active materials, principally TiO2-based nanocomposites for solar fuel production, resource recovery and water/air treatment.  Work in her group also involves the investigation of chemical fate in natural systems. She probes the role of periphyton (algal biofilms) in contaminant accumulation in stream sediments and in denitrification in wetlands.  She studies the ways in which detailed understanding of ecological relationships (periphyton structure, dynamic food web descriptions) improves our ability to predict chemical transfer (bioaccumulation) in aquatic systems and ultimately human health risks.  Application of this research is important in efforts to restore critical ecosystems (Great Lakes), to make ecological forecasts in the face of climate change and to employ ecosystem function for environmental protection (treatment wetlands). She is also studying the unintended ecotoxicological impacts of nanomaterial mixtures in aquatic systems and under light illumination. Recent work entails the adaptive and resilient design of urban systems to incorporate coupled ecological processes in response to climate change and demographic shifts.

Education/Academic qualification

Geography and Environmental Engineering, PhD, Johns Hopkins University

… → 1988

Civil Engineering, MS, University of Miami

… → 1983

Biology, Minor Biochemistry, BA, Northwestern University

… → 1978

Research interests

  • Aquatic chemistry
  • Catalysis
  • Ecotoxicology
  • Emissions treatment technologies
  • Environmental chemistry
  • Treatment technology
  • Wetland biogeochemistry

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  • Research Output

    Exploring co-occurrence patterns between organic micropollutants and bacterial community structure in a mixed-use watershed

    Gao, H., Lavergne, J. M., Carpenter, C. M. G., Desai, R., Zhang, X., Gray, K., Helbling, D. E. & Wells, G. F., May 2019, In : Environmental Science: Processes and Impacts. 21, 5, p. 867-880 14 p.

    Research output: Contribution to journalArticle

  • Formal quantum efficiencies for the photocatalytic reduction of CO 2 in a gas phase batch reactor

    Cortes, M. A. L. R. M., Hamilton, J. W. J., Sharma, P. K., Brown, A., Nolan, M., Gray, K. A. & Byrne, J. A., Apr 1 2019, In : Catalysis Today. 326, p. 75-81 7 p.

    Research output: Contribution to journalArticle

  • 5 Scopus citations

    Photochemical interactions between n-Ag 2 S and n-TiO 2 amplify their bacterial stress response

    Wilke, C. M., Petersen, C., Alsina, M. A., Gaillard, J. F. & Gray, K. A., Jan 1 2019, In : Environmental Science: Nano. 6, 1, p. 115-126 12 p.

    Research output: Contribution to journalArticle

  • 1 Scopus citations

    Role of surface reconstruction on Cu/TiO2 nanotubes for CO2 conversion

    Liu, C., Nauert, S. L., Alsina, M. A., Wang, D., Grant, A., He, K., Weitz, E., Nolan, M., Gray, K. A. & Notestein, J. M., Oct 15 2019, In : Applied Catalysis B: Environmental. 255, 117754.

    Research output: Contribution to journalArticle

  • 4 Scopus citations

    Versatile and High-Throughput Polyelectrolyte Complex Membranes via Phase Inversion

    Sadman, K., Delgado, D. E., Won, Y., Wang, Q., Gray, K. A. & Shull, K. R., May 1 2019, In : ACS Applied Materials and Interfaces. 11, 17, p. 16018-16026 9 p.

    Research output: Contribution to journalArticle

  • 3 Scopus citations