Dr. Johnson has 9 years of experience in environmental chemistry (combined academic and consulting). While at Exponent, she has provided technical support on contaminated (including CERCLA) sites, including former refineries, manufactured gas plants, and other industrial sites. She has experience working with a variety of contaminant chemistries, such as hydrocarbons (e.g., PAHs, petroleum biomarkers), PCBs, chlorinated solvents, and heavy metals/metalloids. In addition, Dr. Johnson has assisted with cost allocation and historical reconstruction and performed ship-based field work as part of an environmental monitoring program.
Dr. Johnson graduated from Stanford University with a Ph.D. in Chemical Engineering. Her graduate research focused on subsurface carbon storage in mafic and ultramafic rocks. She has experience with a variety of analytical techniques, including gas chromatography (GC-MS), scanning and transmission electron microscopy (SEM, TEM), isotopic measurement (ICP-MS), and high resolution ion microprobe analysis (SHRIMP-RG). Other projects that she was involved with include an investigation of redox changes induced by CO2 injection to the subsurface, sample preparation for TEM analysis of thin film alloys, experimental investigations of basalt as a potential alkalinity source for mineral carbonation, and production of experimental samples used to calibrate a clumped isotope thermometer for magnesite.
CREDENTIALS & PROFESSIONAL HONORS
- Ph.D., Chemical Engineering, Stanford University, 2014
- M.S., Chemical Engineering, Stanford University, 2010
- B.S., Chemical Engineering, Brown University, 2008, honors
Maher K, Johnson NC, Jackson A, Lammers LN, Torchinsky AB, Weaver KL, Bird DK, Brown, GE. A spatially resolved surface kinetic model for forsterite dissolution. Geochimica et Cosmochimica Acta 2016; 174:313-334
Hahn C, Abram DN, Hansen HA, Hatsukade T, Jackson A, Johnson NC, Hellstern TR, Kuhl KP, Cave ER, Feaster JT, Jaramillo TF. Synthesis of thin film AuPd alloys and their investigation for electrocatalytic CO2 reduction. Journal of Materials Chemistry A 2015; 3:20185-20194.
Lammers LN, Brown GE, Bird DK, Thomas RB, Johnson NC, Rosenbauer RJ, Maher K. Sedimentary reservoir oxidation during geologic CO2 sequestration. Geochimica et Cosmochimica Acta 2015; 155:30-46.
Johnson NC, Thomas B, Maher K, Rosenbauer RJ, Bird DK, Brown GE. Olivine dissolution and carbonation under conditions relevant for in situ carbon storage. Chemical Geology 2014; 373:93–105.
Lee B, Sarin L, Johnson NC, Hurt RH. A nano-selenium reactive barrier approach for managing mercury of the life-cycle of compact fluorescent lamps. Environmental Science and Technology 2009; 43:15:5915–5920.
Johnson NC, Manchester S, Sarin L, Kulaots I, Gau Y, Hurt RH. Mercury vapor release from broken compact fluorescent lamps and in situ capture by new nanomaterial sorbents. Environmental Science and Technology 2008; 42(15):5772–5778.
Johnson NC, Maher K, Thomas B, Rosenbauer RJ, Bird DK, Brown GE. Uptake of isotopic spike by Si-rich alteration layer during olivine dissolution. Oral presentation, Goldschmidt Conference, Sacramento, CA, 2014.
Johnson NC, Maher K, Bird DK, Brown GE. Composition, formation, and role of the Si-rich surface layer during olivine dissolution. Oral presentation, Goldschmidt Conference, Florence, Italy, 2013.
Johnson NC, Thomas B, Maher K, Bird DK, Rosenbauer RJ, Brown GE. Formation of the Si-rich layer on olivine surfaces during carbonation under in-situ conditions. Poster Presentation, Goldschmidt Conference, Montreal, Canada, 2012.
Maher K, Johnson NC, Kharaka Y, Brown GE, Kang S-H, Rosenbauer RJ, Bird DK, Garcia Del Real P, Thomas B. The reactivity of CO2 in the subsurface. Oral presentation, USGS CO2 Sequestration in Unconventional Reservoirs Workshop, West Virginia, 2012.
Johnson NC, Thomas B, Rosenbauer RJ, Maher K, Brown GE. Effect of a Si-rich layer on olivine carbonation under in-situ conditions. Poster presentation, American Geophysical Union Fall Meeting, San Francisco, CA, 2011.
Johnson NC. CO2 sequestration using direct mineral carbonation of Mg-silicates. Oral presentation, Global Climate and Energy Project Annual Research Symposium, Stanford, CA, 2011.
Johnson NC, Thomas B, Maher K, Bird DK, Rosenbauer RJ, Brown GE. Adsorption of organic ligands on silicate mineral surfaces in the presence of CO2 and water: Insight into olivine dissolution rates. Oral presentation, Goldschmidt Conference, Prague, Czech Republic, 2011.
Johnson NC, Thomas B, Maher K, Bird DK, Rosenbauer RJ, Brown GE. Kinetics of olivine carbonation for the geologic storage of carbon dioxide. Poster presentation, Geological capture and storage in mafic and ultramafic rocks: IDOP/ICDP Workshop on the role of oceanic and continental scientific drilling, Muscat, Oman, 2011.
Johnson NC, Westfield I, Lu P, Bourcier W, Kendall T. Basalt as a solid source of calcium and alkalinity for the sequestration of carbon dioxide in building materials. Poster presentation, American Geophysical Union Fall Meeting, San Francisco, CA, December 2010.
Johnson NC, Thomas B, Maher K, Kendelewicz T, Bird DK, Rosenbauer RJ, Brown GE. Kinetics of Mg-silicate carbonation for the geologic storage of carbon dioxide. Oral presentation, American Chemical Society National Meeting, San Francisco, CA, 2010.
Johnson NC, Thomas B, Maher K, Kendelewicz T, Bird DK, Rosenbauer RJ, Brown GE. Kinetics of olivine carbonation at 60°C and 100 bar. Poster presentation, Geological Society of America Annual Meeting, Portland, OR, 2009.
Johnson NC, Hurt RH. The characterization and capture of mercury released from broken fluorescent light bulbs. Poster presentation, American Institute of Chemical Engineers Annual Meeting, Salt Lake City, UT, 2007.
Kendall T, Johnson N, Bourcier W, Garrison G, Bresson J. Neutralization of acid and production of carbonate-containing compositions. US20110091366 A1; April 21, 2011.
American Chemical Society
Journal of Alloys and Compounds
Geochimica et Cosmochimica Acta
Environmental Science and Technology
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