Publication

From the University of Alberta

  • Roshan Kumar Singh, Seema Plajapati, Indra Mohan Nigam, Ran Zhao, Tarun Gupta (2025) “Particulates and Gaseous Emission from the Indian Cropland Agricultural Sector and Health Burden Attributable to Emitted Primary PM2.5” ACS Environmental Science & Technology Air 2, 8, 1656-1667 DOI:10.1021/acsestair.5c00107  link
  • Rowshon Afroz, Jarred Alonzo, Sohaib Omar, Chu-Wen Cheng, Stephanie R. Schneider, Ran Zhao (2025) “Impact of Wildfire Smoke PM2.5 on Indoor Air Quality of Public Buildings on a University Campus.” ACS Environmental Science & Technology Air, 2,4, 625-636  DOI:10.1021/acsestair.4c00342  link
  • Xinyang Guo, Rowshon Afroz, Shuang Wu, Kimberly Wong, Valerie Carney, Martin J. Zuidhoff, Joey Saharchuk, Hans Osthoff, Ran Zhao (2025) “Characterizing amino compounds in indoor poultry farms: air quality and its impact on workers and chickens in Canadian egg farms.” RSC Environmental Science: Processes & Impacts DOI:10.1039/D4EM00254G  link
  • Max Loebel Roson, Sheri Schmidt, Vikram Choudhary, Travor Johnson, Paulina de la Mata, James Harynuk, Ran Zhao (2024) “Comprehensive analysis of emissions from wood and cow dung burning using chemometrics and two-dimensional gas chromatography.” Chemosphere  DOI: 10.1016/j.chemosphere.2024.143445  link
  • Rowshon Afroz, Xinyang Guo, Chu-Wen Cheng, Sohaib Omar, Valerie L. Carney, Martin J. Zuidhof, Ran Zhao (2024) “Assessments and application of low-cost sensors to study indoor air quality in layer facilities.” Environmental Technology & Innovation.  DOI: 10.1016/j.eti.2024.103773  link
  • Vikram Choudhary, Anil Kumar Mandariya, Ran Zhao, Tarun Gupta (2024) “Field evidence of brown carbon absorption enhancement linked to organic nitrogen formation in Indo-Gangetic Plain.” Science of the Total Environment.  DOI: 10.1016/j.scitotenv.2024.172506  link
  • Tania Gautam, Erica Kim, Lisa Ng, Vikram Choudhary, Jessica Amorim, Ran Zhao (2024) “Photooxidation-Initiated Aqueous-Phase Formation of Organic Peroxides: Delving into Formation Mechanisms.” Environmental Science & Technology.  DOI: 10.1021/acs.est.3c01162 link
  • Shuang Wu, Erica Kim, Ran Zhao (2023) “Acetal Formation of Flavoring Agents with Propylene Glycol in E-Cigarettes: Impacts on Indoor Partitioning and Thirdhand Exposure.” Environmental Science & Technology. 57, 50, 21284–21294 DOI: 10.1021/acs.est.3c08514 link
  • (RSC ESPI Best Paper Award) Xinyang Guo, Ya-Chun Chan, Tania Gautam, Ran Zhao (2023) “Autoxidation of glycols used in inhalable daily products: implications for the use of artificial fogs and e-cigarettes.” RSC Physical Environmental Science: Processes & Impacts. 25, 1657-1669 DOI: 10.1039/D3EM00214D link
  • (Selected as a 2023 PCCP HOT article) Max Loebel Roson, Maya Abou-Ghanem, Erica Kim, Shuang Wu, Dylan Long, Sarah Styler, Ran Zhao (2023) “Unexpected electrophiles in the atmosphere – anhydride nucleophile reactions and uptake to biomass burning emissions.” RSC Physical Chemistry Chemical Physics. 25, 18742-18756 DOI: 10.1039/D3CP01751F link
  • Vikram Choudhary, Max Loebel Roson, Xinyang Guo, Tania Gautam, Tarun Gupta, Ran Zhao (2023) “Aqueous-phase photochemical oxidation of water-soluble brown carbon aerosols arising from solid biomass fuel burning.” RSC Environmental Science: Atmospheres. DOI: 10.1039/D2EA00151A  link
  • Rowshon Afroz, Xinyang Guo, Chu-Wen Cheng, Ryan Duruisseau-Kuntz, Ariel Delorme, Ran Zhao (2023) “Investigation of Indoor Air Quality in University Residences Using Low-Cost Sensors.” RSC Environmental Science: Atmospheres. DOI: 10.1039/D2EA00149G  link
  • Shuang Wu, Erica Kim, Dilini Vethanayagam, and Ran Zhao (2022) “Indoor partitioning and potential thirdhand exposure to carbonyl flavoring agents added in e-cigarette and hookah tobacco”, RSC Environmental Science: Processes & Impacts. DOI: 10.1039/D2EM00365A link
  • Xinyang Guo, Toluwatise Ehindero, Chester Lau, and Ran Zhao (2022) “Impact of glycol-based solvents on indoor air quality—Artificial fog and exposure pathways of formaldehyde and various carbonyls”, Indoor Air. DOI: 10.1111/ina.13100 link
  • Vikram Choudhary, Tarun Gupta, and Ran Zhao (2022) “Evolution of Brown Carbon Aerosols during Atmospheric Long-Range Transport in the South Asian Outflow and Himalayan Cryosphere”, ACS Earth and Space Chemistry. DOI: 10.1021/acsearthspacechem.2c00047 link
  • Shuang Wu, Siti Hayati, Erica Kim, Paulina de la Mata, James Harynuk, and Ran Zhao (2022) “Henry’s Law Constants and Indoor Partitioning of Microbial Volatile Organic Compounds” Environmental Science & Technology DOI:10.1021/acs.est.1c07882 link
  • Tania Gautam, Shuang Wu, Jeff Ma, and Ran Zhao (2022) “Potential Matrix Effects in Iodometry Determination of Peroxides Induced by Olefins”. Journal of Physical Chemistry A DOI:10.1021/acs.jpca.1c10717  link
  • Max Loebel Roson, Ryan Duruissearu-Kuntz, Meng Wang, Keifer Klimchuk, Robin Abel, James Harynuk and Ran Zhao (2021). “Chemical Characterization of Emissions Arising from Solid Fuel Combustion—Contrasting Wood and Cow Dung Burning”. ACS Earth and Space Chemistry DOI: 10.1021/acsearthspacechem.1c00268 Link
  • Jéssica Vejdani Amorim, Xinyang Guo, Tania Gautam, Rongyan Fang, Christian Fotang, Florence J. Williams and Ran Zhao (2021). “Photo-Oxidation of Pinic Acid in the Aqueous Phase: A Mechanistic Investigation Under Acidic and Basic pH Conditions”. RSC Environmental Sciences – Atmospheres DOI: 10.1039/D1EA00031D  Link
  • Chester Lau, Ran Zhao, and Dilini Vethanayagam (2020). “Chemistry Review of Vaping Products and Respiratory Injury” Spectrum DOI: 10.29173/spectrum92 Link
  • Chester Lau, Max Loebel Roson, Keifer Klimchuk, Tania Gautam, Boyang Zhao, and Ran Zhao (2020). “Particulate Matter Emitted from Ultrasonic Humidifiers ‐ Chemical Composition and Implication to Indoor Air”. Indoor Air DOI: 10.1111/ina.12765 Link
  • Jéssica Vejdani Amorim, Shuang Wu, Keifer Klimchuk, Chester Lau, Florence J. Williams, Yuanlong Huang, and Ran Zhao (2020). “pH Dependence of the OH Reactivity of Organic Acids in the Aqueous Phase”. Environmental Science & Technology
    DOI: 10.1021/acs.est.0c03331 Link
  • R. Zhao (2018). “Recent Development and Application of Chemical Ionization Mass Spectrometry in Atmospheric Chemistry”. In Encyclopedia of Analytical Chemistry, R. A. Meyers (Ed.). doi:10.1002/9780470027318.a9655 Link

Selected Publication from Postdoc at Caltech

  • R. Zhao, C.M. Kenseth, Y. Huang, N.F. Dalleska, and J.H.S. Seinfeld (2018). “Rapid aqueous-phase hydrolysis of ester hydroperoxides arising from Criegee intermediates and organic acids”  J. Phys. Chem. A, 122: 5190-5201. Link
  • R. Zhao, C.M. Kenseth, Y. Huang, N.F. Dalleska, and J.H.S. Seinfeld (2018). “Iodometry-assisted liquid chromatography electrospray ionization mass spectrometry for analysis of organic peroxides: an application to atmospheric secondary organic aerosol.” Environ. Sci & Technol., 52: 2108-2117. Link
  • Y. Huang, R. Zhao, S.M. Charan, C.M. Kenseth, X. Zhang, and J.H.S. Seinfeld (2018). “Unified theory of vapor-wall mass transport in Teflon-walled environmental chambers.” Environ. Sci & Technol. , 53: 2134–2142. Link
  • Y. Huang, M.M. Coggon, R. Zhao, H. Lignell, M.U. Bauer, R.C. Flagan, and J.H. Seinfeld (2017). “The Caltech Photooxidation Flow Tube Reactor: design, fluid dynamics and characterization” Atmos. Meas. Tech., 10, 839-867. Link

Selected Publication from PhD Research at the University of Toronto

  • R. Zhao, D. Aljawhary, A.K.Y. Lee, and J.P.D. Abbatt (2017). “Rapid aqueous-phase photooxidation of dimers in α-pinene SOA” Environ. Sci. Technol. Lett., 4(6): 205-210. Link
  • R. Zhao, A.K.Y. Lee, C. Wang, F. Wania, J.P.S. Wong, S. Zhou and J.P.D. Abbatt (2017). “The Role of Water in Organic Aerosol Multiphase Chemistry: Focus on Partitioning and Reactivity” Advances in Atmospheric Chemistry, vol.1, World Scientific, pp. 95-184, ISBN: 978-981-3147-34-8. Link
  • R. Zhao, A.K.Y. Lee, L. Huang, X. Li, F. Yang and J.P.D. Abbatt (2015).  “Photochemical processing of aqueous atmospheric brown carbon” Atmos. Chem. Phys. 15, 2957-2996. Link
  • R. Zhao, E.L. Mungall, A.K.Y. Lee, D. Aljawhary and J.P.D. Abbatt (2014). “Aqueous-phase photooxidation of levoglucosan: A kinetic and mechanistic study using High Resolution Aerosol Chemical Ionization Mass Spectrometry (HR-Aerosol-CIMS).” Atmos. Chem. Phys., 14, 9695-9706. Link
  • R. Zhao, A.K.Y. Lee, J. Liggio, J.J.B. Wentzell, R.W. Leaitch, A.M. Mcdonald, D. Toom-Sauntry, R.L. Modini, A.L. Corrigan, L.M. Russell, L.J. Noone, J.C. Schroder, A.K. Bertram, L.N. Hawkins,  J.P.D. Abbatt, and J. Liggio (2014). “Cloud partitioning of isocyanic acid (HNCO) and evidence of secondary source of HNCO in ambient air” Geophys. Res. Lett. 41, 6962-6969. Link
  • R. Zhao, A.K.Y. Lee, R. Soong, A.J. Simpson and J.P.D. Abbatt (2013). “Formation of aqueousphase α-hydroxyhydroperoxides (α-HHP): potential atmospheric impacts.” Atmos. Chem. Phys., 13, 5857-5872. Link
  • R. Zhao, A.K.Y. Lee and J.P.D. Abbatt (2012). “Investigation of aqueous-phase photooxidation of glyoxal and methylglyoxal by Aerosol Chemical Ionization Mass Spectrometry: observation of hydroxyhydroperoxide formation” J. Phys. Chem. A 116(24): 6253-6263. Link