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
Mackenzie B. Humes, Mingyi Wang, Sunhye Kim, Jo E. Machesky, Drew R. Gentner, Allen L. Robinson, Neil M. Donahue, Albert A. Presto
Summary: The study finds that aromatic compounds are the main contributors to secondary organic aerosol (SOA) formation from volatile chemical products (VCPs), while ether and ester functional groups hinder the autoxidation process. Therefore, reducing the use of oxygenated aromatic compounds in VCPs may help decrease the generation of SOA in urban areas.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
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
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
Chemistry, Multidisciplinary
Bellamy Brownwood, Avtandil Turdziladze, Thorsten Hohaus, Rongrong Wu, Thomas F. Mentel, Philip T. M. Carlsson, Epameinondas Tsiligiannis, Mattias Hallquist, Stefanie Andres, Luisa Hantschke, David Reimer, Franz Rohrer, Ralf Tillmann, Benjamin Winter, Jonathan Liebmann, Steven S. Brown, Astrid Kiendler-Scharr, Anna Novelli, Hendrik Fuchs, Juliane L. Fry
Summary: Alkyl nitrate and secondary organic aerosol are generated from the reaction of nitrate radicals with isoprene, with observed yield and characteristics determined through experiments conducted under various reaction conditions.
ACS EARTH AND SPACE CHEMISTRY
(2021)
Article
Environmental Sciences
Camille Noblet, Jean-Luc Besombes, Marie Lemire, Mathieu Pin, Jean-Luc Jaffrezo, Olivier Favez, Robin Aujay-Plouzeau, Adrien Dermigny, Nicolas Karoski, Denis Van Elsuve, Pascal Dubois, Serge Collet, Francois Lestremau, Alexandre Albinet
Summary: This study evaluated the emission factors and organic species of typical garden waste burning, finding that emissions from green waste burning were 2 to 30 times higher than wood log combustion, with toxic PAH equivalent EFs up to 3-10 times higher for fireplace and open-air wood burning. Different chemical fingerprints between both sources were identified, highlighting the impact of fuel nature and combustion performance on emissions.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Liyuan Zhou, Tengyu Liu, Dawen Yao, Hai Guo, Chunlei Cheng, Chak K. Chan
Summary: Cooking is a significant source of organic aerosols in urban areas, with animal fats emitting both POA and NMOGs that can form OOA after atmospheric oxidation. Laboratory studies found that some POA emitted during cooking can transform into OOA after aging.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Meteorology & Atmospheric Sciences
Jiukun Xian, Shijie Cui, Xingzhou Chen, Jingyun Wang, Yifan Xiong, Chenjuan Gu, Yuan Wang, Yunjiang Zhang, Haiwei Li, Junfeng Wang, Xinlei Ge
Summary: This study conducted a field campaign to investigate the chemical characteristics of fine aerosols in summer Nanjing and elucidate the variations and formation mechanisms of secondary components. The results showed that the PM1 mass concentration in Nanjing was 18.88 μg/m³ and mainly consisted of secondary species (78%). Nitrate was the dominant secondary inorganic species, accounting for 30% of PM1 mass, while sulfate contribution was minor. Positive matrix factorization identified and quantified different sources of organic aerosols. This research provides valuable insights for future air pollution modeling and efficient control in similar regions.
ATMOSPHERIC RESEARCH
(2023)
Article
Environmental Sciences
Emelie L. Graham, Cheng Wu, David M. Bell, Amelie Bertrand, Sophie L. Haslett, Urs Baltensperger, Imad El Haddad, Radovan Krejci, Ilona Riipinen, Claudia Mohr
Summary: Secondary organic aerosol (SOA) is formed through the oxidation of volatile organic compounds (VOCs). The Nitrate Aerosol and Volatility Experiment (NArVE) aimed to study the NO3-induced SOA formation and evolution from three biogenic VOCs. Data from the study showed that the SOA formed from NO3 oxidation of alpha-pinene or isoprene is dominated by low-volatility organic compounds (LVOCs) and semi-volatile organic compounds (SVOCs), while the corresponding SOA from beta-caryophyllene consists primarily of extremely low-volatility organic compounds (ELVOCs) and LVOCs.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Yinxi Yao, Yingyi Zhang, Junwei Song, Qi Yuan, Shan Wang, Xiaoying Li, Yuqing Zhang, Xiang Ding, Weihai Xu, Xiang Su, Senchao Lai
Summary: This study collected and analyzed total suspended particle (TSP) samples in the northern and western South China Sea in summer. The results indicated that sea salt emissions, secondary formation, biomass burning, and photochemical secondary oxidation were important sources of aerosols over the South China Sea.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
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
Engineering, Environmental
Fobang Liu, Tianchang Xu, Nga Lee Ng, Hang Lu
Summary: This study reveals that oxidative stress may be a mechanism through which ambient fine particulate matter exerts adverse biological effects. It also demonstrates the association between cellular health and ROS levels upon exposure to secondary organic aerosols, emphasizing the role of oxidative stress in the biological effects of SOA exposure.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Yan Qin Ren, Jie Wei, Yuan Yuan Ji, Zhen Hai Wu, Fang Bi, Rui Gao, Xue Zhong Wang, Hong Li
Summary: The study shows that primary emission and secondary formation have significant impacts on the organic compositions of fine aerosols in summer Beijing. Coal combustion is an important source of OC during polluted period, while biomass burning is the main contributor during clean period. The study also highlights the importance of atmospheric oxidants and particle acidity in the formation of secondary organic carbon during high pollution periods in Beijing.
ATMOSPHERIC ENVIRONMENT
(2021)
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
Engineering, Environmental
Varun Kumar, Jay G. Slowik, Urs Baltensperger, Andre S. H. Prevot, David M. Bell
Summary: This study examines the composition and evolution of secondary organic aerosol (SOA) formed by the reactions of aromatic VOCs with OH and NO3 radicals. The results show that the SOA formed by the oxidation of VOCs by OH radicals is dominated by monomers, while the SOA formed by NO3 radicals consists mainly of dimers. The study also highlights the importance of particle-phase reactions in the formation and degradation of SOA. Rating: 8/10
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Jacqueline Bangma, James McCord, Nathan Giffard, Kate Buckman, Jonathan Petali, Celia Chen, Daniel Amparo, Barbara Turpin, Glenn Morrison, Mark Strynar
Summary: While high-resolution MS is suitable for novel PFAS identification and quantification, low-resolution MS/MS is the more commonly used and affordable approach for routine PFAS monitoring. However, the interference of chemical compounds in the quantitative ion channel hinders the verification of PFPeA and PFBA on low-resolution instrumentation. Adjustments to analytical methods, such as altering LC conditions and using matched internal standards, are recommended to investigate and confirm PFBA and PFPeA detections in both biological and environmental samples.
Article
Chemistry, Analytical
Bailey B. Bowers, Joel A. Thornton, Ryan C. Sullivan
Summary: This study investigates the use of iodide time-of-flight chemical ionization mass spectrometry (iodide-ToF-CIMS) for the online characterization of various PFAS compounds in the atmosphere. The researchers successfully measured different PFAS compounds in both gas and aerosol phases using various sample introduction methods. The study also sheds light on the behavior of PFAS compounds during chemical ionization, providing a more fundamental understanding of these compounds. The results demonstrate the potential of iodide-ToF-CIMS for online measurement of nonvolatile PFAS compounds in aerosols.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2023)
Article
Chemistry, Multidisciplinary
Madeline E. Cooke, N. Cazimir Armstrong, Ziying Lei, Yuzhi Chen, Cara M. Waters, Yue Zhang, Nicolas A. Buchenau, Monica Q. Dibley, Isabel R. Ledsky, Tessa Szalkowski, Jamy Y. Lee, Karsten Baumann, Zhenfa Zhang, William Vizuete, Avram Gold, Jason D. Surratt, Andrew P. Ault
Summary: Oxidation of isoprene, the highest globally emitted biogenic volatile organic compound (BVOC), is a significant source of secondary organic aerosol (SOA) in the atmosphere. The formation of particulate organosulfates from acid-driven reactions of isoprene epoxydiol (IEPDX) isomers contributes to SOA mass. While most studies have focused on organosulfate formation on ammonium sulfate particles, recent research has shown that sea spray aerosol (SSA) in the accumulation mode undergoes further reactions with sulfuric acid to form sodium sulfate. This study demonstrates that significant SOA, including organosulfates, can also form on acidic sodium sulfate particles via laboratory experiments, suggesting that aged SSA may be an underappreciated source of SOA and organosulfates in marine environments.
ACS EARTH AND SPACE CHEMISTRY
(2022)
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
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
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)
Article
Chemistry, Analytical
Jiaqi Zhou, Karsten Baumann, Jason D. Surratt, Barbara J. Turpin
Summary: Large fluoropolymer manufacturing facilities are major sources of per- and polyfluoroalkyl substances (PFAS), and this study investigates the PFAS concentration in the air near a fluoropolymer manufacturing facility in the United States. Thirteen PFAS were found at higher concentrations in the nearfield samples than in the regional background sites, and six PFAS compounds consistently had elevated concentrations across the two sites.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)