Article
Multidisciplinary Sciences
Houssni Lamkaddam, Josef Dommen, Ananth Ranjithkumar, Hamish Gordon, Gunther Wehrle, Jordan Krechmer, Francesca Majluf, Daniil Salionov, Julia Schmale, Sasa Bjelic, Kenneth S. Carslaw, Imad El Haddad, Urs Baltensperger
Summary: The study reveals that processing isoprene oxidation products in cloud droplets can produce a significant amount of secondary organic aerosol, which may have a substantial impact on the global aerosol burden.
Article
Engineering, Environmental
Ziying Lei, Yuzhi Chen, Yue Zhang, Madeline E. Cooke, Isabel R. Ledsky, N. Cazimir Armstrong, Nicole E. Olson, Zhenfa Zhang, Avram Gold, Jason D. Surratt, Andrew P. Ault
Summary: The study demonstrates that initial aerosol acidity plays a significant role in shaping the physicochemical properties of SOA formed from IEPDX, with higher acidity resulting in more organosulfate formation and a tendency for the organic phase to transition to a semi-solid or solid state. These findings can be used to improve model parameterizations of SOA formation and properties from IEPDX to better align predictions with atmospheric observations.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Eleni Dovrou, Kelvin H. Bates, Jean C. Rivera-Rios, Joshua L. Cox, Joshua D. Shutter, Frank N. Keutsch
Summary: In-cloud chemistry, specifically involving the oxidation of sulfur dioxide by ISOPOOH, has been found to lead to sulfate formation, with mechanisms differing from those involving H2O2. The study investigates the chemical mechanisms of this process and identifies pathways for the formation of organic products such as MVK and formaldehyde. Global simulations suggest that while this mechanism is not significant for gas-phase formation of certain products, it can be regionally important for sulfate production.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Chuanen Guo, Luyao Xu, Chenxi Zhang
Summary: This study investigates the heterogeneous OH oxidation mechanism of 3-methyltetraol sulfate (3-MTS), a common organic sulfate in atmospheric particles. The results show that 3-MTS easily undergoes abstraction reaction with OH radicals, generating low-volatility species that are important components of secondary organic aerosol. The study provides insights into the reactivity of other organosulfates in atmospheric aerosols and the conversion of sulfur between its organic and inorganic forms during oxidation.
Article
Environmental Sciences
Dagen D. Hughes, Megan B. Christiansen, Alissa Milani, Michael P. Vermeuel, Gordon A. Novak, Hariprasad D. Alwe, Angela F. Dickens, R. Bradley Pierce, Dylan B. Millet, Timothy H. Bertram, Charles O. Stanier, Elizabeth A. Stone
Summary: The Lake Michigan Ozone Study conducted in 2017 aimed to understand the sources contributing to ozone and fine particles along the Lake Michigan coast. The study found that different weather patterns during high ozone periods affected the regional characteristics of PM2.5. The research also highlighted the importance of anthropogenic sulfate emissions and aerosol acidity on secondary organic aerosol (SOA) formation.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Environmental Sciences
Dongwook Kim, Changmin Cho, Seokhan Jeong, Soojin Lee, Benjamin A. Nault, Pedro Campuzano-Jost, Douglas A. Day, Jason C. Schroder, Jose L. Jimenez, Rainer Volkamer, Donald R. Blake, Armin Wisthaler, Alan Fried, Joshua P. DiGangi, Glenn S. Diskin, Sally E. Pusede, Samuel R. Hal, Kirk Ullmann, L. Gregory Huey, David J. Tanner, Jack Dibb, Christoph J. Knote, Kyung-Eun Min
Summary: Glyoxal (CHOCHO), the simplest dicarbonyl in the troposphere, is a potential precursor for secondary organic aerosol (SOA) and brown carbon (BrC) that affect air quality and climate. Measurements during the KORUS-AQ campaign in 2016 allowed for detailed quantification of CHOCHO loss mechanisms for SOA formation. The production of CHOCHO was mainly from oxidation of aromatics, and its loss to aerosol was the most important removal path.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Physical
C. Dubois, D. Cholleton, R. Gemayel, Y. Chen, J. D. Surratt, C. George, P. Rairoux, A. Miffre, M. Riva
Summary: Sulfate aerosol can decrease light backscattering by absorbing isoprene epoxydiols, affecting the optical properties of aerosols. Experimental results indicate that the complex optical refractive index plays a crucial role in the observed decrease in light reflection.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Chemistry, Physical
Alison M. Fankhauser, Ziying Lei, Kimberly R. Daley, Yao Xiao, Zhenfa Zhang, Avram Gold, Bruce S. Ault, Jason D. Surratt, Andrew P. Ault
Summary: Organosulfates formed from organic-derived oxidation products with sulfate ions contribute to a significant portion of secondary organic aerosol mass. However, the molecular structures of these organosulfates under atmospherically relevant conditions are not well understood. In this study, the protonation state and vibrational modes of 2-methyltetrol sulfates were investigated. It was found that these organosulfates are primarily deprotonated at atmospheric pH values.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Environmental Sciences
Duseong S. Jo, Alma Hodzic, Louisa K. Emmons, Simone Tilmes, Rebecca H. Schwantes, Michael J. Mills, Pedro Campuzano-Jost, Weiwei Hu, Rahul A. Zaveri, Richard C. Easter, Balwinder Singh, Zheng Lu, Christiane Schulz, Johannes Schneider, John E. Shilling, Armin Wisthaler, Jose L. Jimenez
Summary: Secondary organic aerosol (SOA) is a significant contributor to fine particulate matter in the atmosphere, with volatility-based SOA parameterizations showing reasonable performance but potential errors when applied to future climatic conditions. Explicit mechanism predictions suggest variability in isoprene epoxydiols (IEPOX SOA) concentrations across different scenarios, highlighting the importance of capturing key physicochemical drivers for accurate SOA concentration predictions in climate studies.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Mega Octaviani, Manish Shrivastava, Rahul A. Zaveri, Alla Zelenyuk, Yue Zhang, Quazi Z. Rasool, David M. Bell, Matthieu Riva, Marianne Glasius, Jason D. Surratt
Summary: The study evaluates mechanistic IEPOX-SOA models through controlled experiments, finding that IEPOX multiphase chemistry can increase particle size and concentration, while the model can also predict particle number and diameter at the end of the experiment.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Manish Shrivastava, Quazi Z. Rasool, Bin Zhao, Mega Octaviani, Rahul A. Zaveri, Alla Zelenyuk, Brian Gaudet, Ying Liu, John E. Shilling, Johannes Schneider, Christiane Schulz, Martin Zoeger, Scot T. Martin, Jianhuai Ye, Alex Guenther, Rodrigo F. Souza, Manfred Wendisch, Ulrich Poeschl
Summary: Combining aircraft measurements and model simulations, this study reveals the important role of in-plant biochemistry in fine particulate formation and atmosphere-biosphere- climate interactions over the Amazon rainforest. The study shows that direct emissions of certain gases formed by in-plant biochemical reactions explain a significant portion of sub-micrometer aerosol particles in the upper troposphere.
ACS EARTH AND SPACE CHEMISTRY
(2022)
Article
Chemistry, Analytical
Wen Zhang, Haofei Zhang
Summary: Iodide-adduct chemical ionization mass spectrometry (I-CIMS) is widely used in atmospheric chemistry to detect oxygenated volatile organic compounds (OVOCs) in real time. The study reports secondary ion chemistry from interactions between strong oxygen donors and acidic OVOCs in I-CIMS, which can lead to misinterpretations of gas-phase products' compositions and distributions. However, the varying degrees of signal change in response to secondary ion chemistry may provide clues to OVOCs' functionalities.
ANALYTICAL CHEMISTRY
(2021)
Article
Meteorology & Atmospheric Sciences
Himanshu Sharma, Manish Shrivastava, Balwinder Singh
Summary: This study develops a physics-informed deep neural network (DNN) approach to simulate the chemical formation processes of isoprene epoxydiol secondary organic aerosols (IEPOX-SOA) over the Amazon rainforest. The trained DNN shows promise in reducing computational expense and can be applied to other computationally expensive chemistry solvers in climate models.
NPJ CLIMATE AND ATMOSPHERIC SCIENCE
(2023)
Article
Environmental Sciences
Shijie Liu, Yiqian Wang, Gehui Wang, Si Zhang, Dapeng Li, Lin Du, Can Wu, Wei Du, Shuangshuang Ge
Summary: This study investigated the yield and light absorption of secondary organic aerosols (SOA) from toluene photooxidation under different nitrogen oxides (NO2) levels. It found that the SOA yield initially increased and then decreased with increasing NO2 concentration, while light absorption and mass absorption coefficient (MAC) of the toluene-derived SOA continuously increased. The main species associated with the increase in SOA light absorption were nitrogen-containing organic compounds (NOCs), particularly nitro compounds.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Linlin Liang, Guenter Engling, Wanyun Xu, Qianli Ma, Weili Lin, Xuyan Liu, Chang Liu, Gen Zhang
Summary: Laboratory experiments suggest acid-catalyzed aqueous-phase production can promote the formation of isoprene SOA, i.e., 2-methyltetrols. In this study, ambient observations and chemical measurements were used to investigate the importance of environmental factors in the formation of isoprene epoxydiols (IEPDX) SOA under atmospheric humidity conditions. The results show that photochemical processes dominate the formation of 2-methyltetrols in humid environments, and aerosol acidity has a limited influence on their formation. Additionally, high liquid water content reduces aerosol droplet acidity, thereby diminishing the enhancement of SOA formation.
Article
Chemistry, Physical
Alison M. Fankhauser, Ziying Lei, Kimberly R. Daley, Yao Xiao, Zhenfa Zhang, Avram Gold, Bruce S. Ault, Jason D. Surratt, Andrew P. Ault
Summary: Organosulfates formed from organic-derived oxidation products with sulfate ions contribute to a significant portion of secondary organic aerosol mass. However, the molecular structures of these organosulfates under atmospherically relevant conditions are not well understood. In this study, the protonation state and vibrational modes of 2-methyltetrol sulfates were investigated. It was found that these organosulfates are primarily deprotonated at atmospheric pH values.
JOURNAL OF PHYSICAL CHEMISTRY A
(2022)
Article
Chemistry, Medicinal
Alexa Canchola, Siri Langmo, Ruth Meletz, Michael Lum, Ying-Hsuan Lin
Summary: Despite previous studies indicating the thermal stability of vitamin E acetate (VEA) at low temperatures, VEA readily decomposes into various degradation products at vaping temperatures of <200 degrees C. The presence of molecular oxygen and transition metals such as Cu-Ni greatly enhance VEA degradation, resulting in the formation of numerous degradation products. The results highlight the importance of oxidation pathways in VEA thermal degradation and aid in the prediction of degradation products from e-liquids.
CHEMICAL RESEARCH IN TOXICOLOGY
(2023)
Article
Toxicology
C. M. Sabbir Ahmed, Alexa Canchola, Biplab Paul, Md Rubaiat Nurul Alam, Ying-Hsuan Lin
Summary: This study investigated the role of long non-coding RNAs (lncRNAs) in gene expression changes induced by exposure to diesel exhaust particles (DEP). The findings showed that several lncRNAs associated with respiratory diseases exhibited altered expression in both normal and COPD cells, and potential lncRNAs related to lung cancer were also identified. This highlights the potential importance of lncRNAs in regulating DEP-induced gene expression changes.
INHALATION TOXICOLOGY
(2023)
Article
Chemistry, Physical
Bo Chen, Jessica A. Mirrielees, Yuzhi Chen, Timothy B. Onasch, Zhenfa Zhang, Avram Gold, Jason D. Surratt, Yue Zhang, Sarah D. Brooks
Summary: We measured the Tg of IEPOX-derived SOA components using broadband dielectric spectroscopy and found that the Tg of mixtures depends on their composition. The Kwei equation provides a good fit for the Tg-composition relationship of complex mixtures. We demonstrate that the non-linear deviation of Tg as a function of composition may be caused by changes in the extent of hydrogen bonding in the mixture using Raman spectroscopy and density functional theory.
JOURNAL OF PHYSICAL CHEMISTRY A
(2023)
Correction
Chemistry, Multidisciplinary
David O. De Haan, Lelia N. Hawkins, Praveen D. Wickremasinghe, Alyssa D. Andretta, Juliette R. Dignum, Audrey C. De Haan, Hannah G. Welsh, Elyse A. Pennington, Tianqu Cui, Jason D. Surratt, Mathieu Cazaunau, Edouard Pangui, Jean-Francois Doussin
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
David O. De Haan, Lelia N. Hawkins, Praveen D. Wickremasinghe, Alyssa D. Andretta, Juliette R. Dignum, Audrey C. De Haan, Hannah G. Welsh, Elyse A. Pennington, Tianqu Cui, Jason D. Surratt, Mathieu Cazaunau, Edouard Pangui, Jean-Francois Doussin
Summary: Aqueous-phase dark reactions during the co oxidation of glyoxal and S(IV) were found to be a potential source of brown carbon (BrC), which occurs more slowly in sunlit, sulfite containing solutions. Detectable amounts of BrC in aerosol require an OH radical source and occur most rapidly after a cloud event. Radical-initiated reactions and redox mechanisms play a role in this process. However, the BrC produced is about ten times less light-absorbing than wood smoke BrC at 365 nm.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Jie Zhang, Manish Shrivastava, Alla Zelenyuk, Rahul A. Zaveri, Jason D. Surratt, Matthieu Riva, David Bell, Marianne Glasius
Summary: This study investigates the key parameters governing the formation of isoprene epoxydiol-derived secondary organic aerosol (IEPOX-SOA). The results show that reducing the reaction rate constants of 2-methyltetrol (tetrol) can bring the model predictions in agreement with experimental measurements of IEPOX-SOA under acidified aerosol conditions. Additionally, both the organosulfate (OS) and tetrol reaction rate constants need to be reduced for nonacidified aerosols to match the chamber observations. The study also reveals that the aerosol acidity significantly affects the oligomerization rate of tetrols.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Chemistry, Medicinal
Faria Khan, Yuzhi Chen, Hadley J. Hartwell, Jin Yan, Ying-Hsuan Lin, Anastasia Freedman, Zhenfa Zhang, Yue Zhang, Andrew T. Lambe, Barbara J. Turpin, Avram Gold, Andrew P. Ault, Rafal Szmigielski, Rebecca C. Fry, Jason D. Surratt
Summary: This study demonstrates that atmospheric chemical aging of particulate 2-MTSs induces toxic effects in human lung cells, leading to changes in the expression of genes related to oxidative stress and inflammation.
CHEMICAL RESEARCH IN TOXICOLOGY
(2023)
Article
Engineering, Environmental
Clara M. A. Eichler, Naomi Y. Chang, Elaine A. Cohen Hubal, Daniel E. Amparo, Jiaqi Zhou, Jason D. Surratt, Glenn C. Morrison, Barbara J. Turpin
Summary: During the Indoor PFAS Assessment (IPA) Campaign, concentrations of nine neutral PFAS were measured in air and cotton cloth in 11 homes in North Carolina. The study found that fluorotelomer alcohols were the dominant species in indoor air, while perfluorooctane sulfonamidoethanols accumulated most significantly in cloth. Cloth-air partition coefficients were derived for different PFAS and were positively correlated with the octanol-air partition coefficient. Temperature was found to have the greatest effect on PFAS accumulation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Soil Science
Claudia Christine E. Avila, Michael Schaefer, Alyssa M. Duro, Thomas P. Haensel, Abdi Garniwan, Ying Lin, G. Darrel Jenerette, Peter S. Nico, Eric Dubinsky, Marco Keiluweit, Eoin L. Brodie, Ying-Hsuan Lin, Peter M. Homyak, Samantha C. Ying
Summary: Drying-rewetting cycles are common in natural and managed ecosystems, causing pulses of carbon emissions. This study investigates the impact of different water regimes on carbon respiration in irrigated agricultural soils.
Article
Engineering, Environmental
Bosen Jin, Yiwen Zhu, Weiyang Zhao, Zekun Liu, Shun Che, Kunpeng Chen, Ying-Hsuan Lin, Jinyong Liu, Yujie Men
Summary: This study investigated the structure-biodegradability relationship for different ether PFAS in activated sludge communities. Only polyfluorinated ethers with specific molecular structures underwent biotransformation, leading to the formation of unstable fluoroalcohol intermediates subject to spontaneous defluorination. The findings suggest that aerobic biotransformation/defluorination can complement advanced reduction processes for cost-effective treatment of PFAS.
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Chemistry, Analytical
Marc Webb, Liyong Cui, Glenn Morrison, Karsten Baumann, Jason D. Surratt, Zhenfa Zhang, Joanna Atkin, Barbara J. Turpin
Summary: Humidity affects the removal and concentrations of indoor pollutants, especially in humid homes. Research on a model organic peroxide showed that the relative humidity has a greater effect on the removal rate and reaction probability on soiled surfaces compared to clean surfaces. These findings are important for predicting indoor concentrations of organic peroxides.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Environmental Sciences
Daniel J. Bryant, Beth S. Nelson, Stefan J. Swift, Sri Hapsari Budisulistiorini, Will S. Drysdale, Adam R. Vaughan, Mike J. Newland, James R. Hopkins, James M. Cash, Ben Langford, Eiko Nemitz, W. Joe F. Acton, C. Nicholas Hewitt, Tuhin Mandal, Bhola R. Gurjar, Shivani, Ranu Gadi, James D. Lee, Andrew R. Rickard, Jacqueline F. Hamilton
Summary: Delhi, India is one of the most polluted cities in the world, but little is known about the emissions of biogenic volatile organic compounds (VOCs) or the sources of secondary organic aerosol (SOA). This study provides the first molecular-level measurements of SOA derived from isoprene and monoterpene in Delhi, and demonstrates that both biogenic and anthropogenic sources of these compounds can be important in urban areas.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Environmental
Kunpeng Chen, Raphael Mayorga, Caitlin Hamilton, Roya Bahreini, Haofei Zhang, Ying-Hsuan Lin
Summary: Carbonyl chromophores derived from nighttime oxidation of furan and pyrrole derivatives significantly contribute to light absorption in secondary BrC. The quantified N-containing carbonyl chromophores contribute to over 40% of total light absorption at specific wavelengths, highlighting their divergent importance in different spectral regions.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Daniel J. J. Bryant, Alfred W. W. Mayhew, Kelly L. L. Pereira, Sri Hapsari Budisulistiorini, Connor Prior, William Unsworth, David O. O. Topping, Andrew R. R. Rickard, Jacqueline F. F. Hamilton
Summary: This study proposes a quantification method based on the prediction of relative ionisation efficiency factors to correct the concentrations of biogenic secondary organic aerosol species. The method was developed using commercially available standards and was able to predict the ionisation efficiency factors of biogenic organic acids without authentic standards. The concentration of biogenic secondary organic aerosol was corrected using the predicted factors and resulted in a significant decrease in average concentration.
ENVIRONMENTAL SCIENCE-ATMOSPHERES
(2023)
