Article
Chemistry, Multidisciplinary
Atsushi Gabe, Takanori Baba, Takuma Hirahara, Takahiro Mikami, Naohiro Oda, Yusuke Miyata, Kazunori Kawata, Yoshinobu Otake
Summary: Carbon edge sites play an important role in surface chemistry, and carbon active sites are key in many applications. Research has found that certain temperature ranges can result in the release of CO2 and H2O, generating active sites for hydrogen adsorption.
Article
Chemistry, Organic
Alexandra Seemann, Johannes Panten, Andreas Kirschning
Summary: This study utilizes continuous flow synthesis to produce medium-sized rings and macrocycles relevant to the fragrance industry, with triperoxides as important intermediates. The synthesis is carried out in two continuously operated flow reactors connected by a membrane-operated separator, demonstrating the practicality of flow chemistry. All new macrocycles have been tested for their olfactory properties related to musk.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Physical
Ken Miyajima, Fumitaka Mafune
Summary: In this study, the thermal decomposition processes of chemically prepared triruthenium dodecacarbonyl, Ru3(CO)12, were investigated using variable-temperature mass spectrometry in the gas phase. The results showed that CO ligand molecules were sequentially released within the temperature range of 500-900 K, forming different ruthenium clusters. Among them, Ru3(CO)7 was found to be the most thermally durable, while Ru3(CO)3, Ru3(CO)5, and Ru3(CO)10 decomposed within a narrow temperature range.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Ecology
Ernest D. Osburn, Peter J. Hoch, Jane M. Lucas, Steven G. McBride, Michael S. Strickland
Summary: Soil biota are considered as a major factor influencing litter decomposition, but the exact mechanisms are unclear. This study found functional differences among decomposer communities, with functional breadth playing a more important role than home-field advantage. There is a relationship between microbial life-history strategies and litter decomposition functions. Home-field advantage is not evident under high functional breadth conditions. These findings provide insights into the mechanisms by which microbial communities influence leaf litter decomposition.
FUNCTIONAL ECOLOGY
(2022)
Article
Engineering, Environmental
J. Ruzickova, S. Koval, H. Raclavska, M. Kucbel, B. Svedova, K. Raclavsky, D. Juchelkova, F. Scala
Summary: Biochar has been widely studied for its potential benefits as a soil conditioner and bio-accumulator, but its application in agriculture may pose risks to ecosystems due to the presence of toxic organic pollutants. The European Biochar Certificate sets production criteria, but even meeting these values may not prevent biochar from causing phytotoxicity. The presence of water-soluble organic compounds in biochar may be responsible for its phytotoxic effects.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Analytical
Mi-Ji Yoo, Min-Hee Lee, Jan E. Szulejko, Kumar Vikrant, Ki-Hyun Kim
Summary: The use of UiO-66 as a cold-trap medium in TD-GC/MS system shows efficient analysis of formaldehyde, while MOF-5 is more prone to breakthrough.
MICROCHEMICAL JOURNAL
(2021)
Article
Soil Science
Florent Levavasseur, Gwenaelle Lashermes, Bruno Mary, Thierry Morvan, Bernard Nicolardot, Virginie Parnaudeau, Laurent Thuries, Sabine Houot
Summary: This study quantified the C and N mineralization of 663 EOMs from five groups and found significant variability in mineralization within and between EOM subgroups. Individual EOM calibration of the model produced the best performance, while a unique parameter set per EOM subgroup decreased model performance and using two EOM characteristics for parameter estimation yielded intermediate results.
SOIL USE AND MANAGEMENT
(2022)
Article
Chemistry, Physical
Xueying Li Quinn, Lu Yin, Weikang Li, Mingqian Li, Connor Wicker, Ruixiao Liu, Bryant Dang, Jeff Ortega, Joseph Wang, Ying Shirley Meng
Summary: Printable AgO-Zn batteries are attractive for wearable devices due to their safe chemistry, high energy density, and rechargeability. However, silver dissolution from AgO cathodes limits their shelf life and cycle life. This study investigates the factors affecting silver dissolution in AgO-Zn cells, including electrolyte, cell configuration, and cycling rate. The mechanism of silver dissolution is studied through chemical analysis, and it is found that reducing the complexation step is key to mitigating silver dissolution.
CHEMISTRY OF MATERIALS
(2023)
Article
Geochemistry & Geophysics
Tomas Navratil, Tereza Novakova, James B. Shanley, Jan Rohovec, Maria Vankova
Summary: The fate of atmospherically deposited mercury in forest soils near various anthropogenic emission sources in the Czech Republic was studied. Higher Hg concentrations were found in organic horizons compared to mineral soils, with a thick layer of dust particles identified near cement plants. The concentrations and pools of Hg in organic horizons and mineral soils were influenced by emission sources, but some areas showed Hg levels comparable to pristine Czech forest soils, with elevated concentrations near a chlor-alkali plant.
JOURNAL OF GEOCHEMICAL EXPLORATION
(2021)
Article
Chemistry, Physical
Piotr Rychtowski, Beata Tryba, Hubert Fuks, Maria Angeles Lillo-Rodenas, Maria Carmen Roman-Martinez
Summary: The heat treatment of TiO2 at different temperatures introduces surface defects, which greatly impact its photocatalytic properties in the decomposition of acetaldehyde under visible light. The type of surface defects plays a crucial role in the oxidation process and the overall efficiency of TiO2 as a photocatalyst.
Article
Engineering, Environmental
Jianying Fu, Pengtao Cai, Mingxiu Zhan, Xu Xu, Tong Chen, Xiaodong Li, Wentao Jiao, Yongguang Yin
Summary: The formation and emission of dioxins during thermal desorption remediation is a significant concern. This study reveals the differential formation characteristics of dioxins from chlorine organic contaminated soil (COCS) and non-chlorine organic contaminated soil (NCOCS), and proposes a promising catalytic adsorption material for controlling the emission.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Thermodynamics
Gong Yue, Su Hong, Shang-Hao Liu
Summary: With the continuous development of battery technology, ionic liquids (IL) have gained attention as excellent electrolytes. This study focuses on the safety characteristics of a common ionic liquid at high temperatures. The results show that the ionic liquid exhibits short reaction time and hazard temperature at elevated temperatures.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2023)
Article
Nanoscience & Nanotechnology
Feng Yang, Yuangang Xu, Pengcheng Wang, Qiuhan Lin, Ming Lu
Summary: This study synthesized two series of Energetic metal-organic frameworks (EMOFs) with different ligands and characterized their structure, thermal stability, thermal decomposition kinetics, and energy performance, showing a wide range of density and acceptable energy performance. Among these EMOFs, [Ag(tntrza)](n) stood out for its exceptional detonation performance and catalytic effect on the decomposition of ammonium perchlorate (AP), broadening the horizon for oxygen-enriched EMOFs with catalytic effects.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Environmental Sciences
Brett Nespor, Richard Cochran, Haewoo Jeong, Frank Bowman, David Delene, Evguenii Kozliak, Alena Kubatova
Summary: The study highlights the use of thermal desorption-pyrolysis coupled with gas chromatography-mass spectrometry to characterize organic species in atmospheric particulate matter. Different chemical components in nonvolatile and semivolatile organic PM fractions provide insights into different emission sources, with biogenic and anthropogenic markers distinguishing their origins. These findings offer a more comprehensive characterization of atmospheric PM and aid in identifying emission sources.
ATMOSPHERIC ENVIRONMENT
(2021)
Article
Materials Science, Multidisciplinary
Yang Tao, Yongxin Qian, You Li, Jinian Hao, Tian Xu, Wang Li, Qinghui Jiang, Yubo Luo, Junyou Yang
Summary: The study demonstrates a passive thermal management material based on moisture adsorption and desorption of graphene oxide modified MIL-101Cr, which shows high efficiency in heat dissipation, with higher moisture adsorption capacity and adsorption rate. The material has great potential for long-term heat dissipation for batteries and chips.
MATERIALS TODAY PHYSICS
(2022)
Article
Engineering, Environmental
Mihnea Surdu, Houssni Lamkaddam, Dongyu S. Wang, David M. Bell, Mao Xiao, Chuan Ping Lee, Dandan Li, Lucia Caudillo, Guillaume Marie, Wiebke Scholz, Mingyi Wang, Brandon Lopez, Ana A. . Piedehierro, Farnoush Ataei, Rima Baalbaki, Barbara Bertozzi, Pia Bogert, Zoe Brasseur, Lubna Dada, Jonathan Duplissy, Henning Finkenzeller, Xu-Cheng He, Kristina Hohler, Kimmo Korhonen, Jordan E. Krechmer, Katrianne Lehtipalo, Naser G. A. . Mahfouz, Hanna E. Manninen, Ruby Marten, Dario Massabo, Roy Mauldin, Tuukka Petaja, Joschka Pfeifer, Maxim Philippov, Birte Rorup, Mario Simon, Jiali Shen, Nsikanabasi Silas Umo, Franziska Vogel, Stefan K. . Weber, Marcel Zauner-Wieczorek, Rainer Volkamer, Harald Saathoff, Ottmar Moehler, Jasper Kirkby, Douglas R. Worsnop, Markku Kulmala, Frank Stratmann, Armin Hansel, Joachim Curtius, Andre Welti, Matthieu Riva, Neil M. Donahue, Urs Baltensperger, Imad El Haddad
Summary: This study investigates the effect of high relative humidity (RH) on the gas-particle partitioning of biogenic oxidized organic molecules at low temperatures. The results demonstrate that high RH increases the partitioning of semivolatile compounds and leads to a shift in the chemical composition and volatility distribution of organic aerosols towards less oxygenated and more volatile species.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zhe Peng, Shelly L. Miller, Jose L. Jimenez
Summary: Air disinfection using germicidal ultraviolet light (GUV) has gained attention during the COVID-19 pandemic. This study investigates the impact of GUV on indoor-air-quality by modeling the chemistry initiated by GUV in a typical indoor setting. The analysis shows that GUV can photolyze ozone (O3) and generate hydroxyl radicals (OH) that oxidize indoor volatile organic compounds (VOCs) into more oxidized VOCs. GUV also leads to the formation of secondary organic aerosol (SOA).
ENVIRONMENTAL SCIENCE & TECHNOLOGY LETTERS
(2023)
Article
Meteorology & Atmospheric Sciences
Carsten Warneke, Joshua P. Schwarz, Jack Dibb, Olga Kalashnikova, Gregory Frost, Jassim Al-Saad, Steven S. Brown, Wm Alan Brewer, Amber Soja, Felix C. Seidel, Rebecca A. Washenfelder, Elizabeth B. Wiggins, Richard H. Moore, Bruce E. Anderson, Carolyn Jordan, Tara Yacovitch, Scott C. Herndon, Shang Liu, Toshihiro Kuwayama, Daniel Jaffe, Nancy Johnston, Vanessa Selimovic, Robert Yokelson, David M. Giles, Brent N. Holben, Philippe Goloub, Ioana Popovici, Michael Trainer, Aditya Kumar, R. Bradley Pierce, David Fahey, James Roberts, Emily M. Gargulinski, David A. Peterson, Xinxin Ye, Laura H. Thapa, Pablo E. Saide, Charles H. Fite, Christopher D. Holmes, Siyuan Wang, Matthew M. Coggon, Zachary C. J. Decker, Chelsea E. Stockwell, Lu Xu, Georgios Gkatzelis, Kenneth Aikin, Barry Lefer, Jackson Kaspari, Debora Griffin, Linghan Zeng, Rodney Weber, Meredith Hastings, Jiajue Chai, Glenn M. Wolfe, Thomas F. Hanisco, Jin Liao, Pedro Campuzano Jost, Hongyu Guo, Jose L. Jimenez, James Crawford
Summary: The NOAA/NASA Fire Influence on Regional to Global Environments and Air Quality (FIREX-AQ) experiment aimed to study the impact of fires on regional and global environments and air quality. The experiment measured trace gas and aerosol emissions, observed fire dynamics, assessed fire modeling, and examined connections to ground and satellite observables. The experiment involved aircraft, satellites, mobile laboratories, and ground sites.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Engineering, Environmental
Emily B. Franklin, Lindsay D. Yee, Rebecca Wernis, Gabriel Isaacman-VanWertz, Nathan Kreisberg, Robert Weber, Haofei Zhang, Brett B. Palm, Weiwei Hu, Pedro Campuzano-Jost, Douglas A. Day, Antonio Manzi, Paulo Artaxo, Rodrigo A. F. De Souza, Jose L. Jimenez, Scot T. Martin, Allen H. Goldstein
Summary: Urbanization and fires have a significant impact on the quantities and composition of organic aerosol in the central Amazon, affecting radiative forcing and public health. The composition of ambient organic aerosol is complex and not fully understood, with limited knowledge about the different compounds present. Through analysis of aerosol samples, it was found that fires and urban emissions have distinct effects on the chemical signatures, and only a portion of compounds were observed in both seasons. This study highlights the need for further research to fill the knowledge gaps in understanding the speciation of organic aerosol in the Amazon.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Penggang Zheng, Yi Chen, Zhe Wang, Yuliang Liu, Wei Pu, Chuan Yu, Men Xia, Yang Xu, Jia Guo, Yishuo Guo, Linhui Tian, Xiaohui Qiao, Dan Dan Huang, Chao Yan, Wei Nie, Douglas R. Worsnop, Shuncheng Lee, Tao Wang
Summary: This study conducted ambient measurements of OOMs at a regional background site in South China. It revealed that nitrogen-containing products were dominant, and different factors influenced the composition and oxidation state of OOMs. The results demonstrated the significant role of OOMs in sub-100 nm particle growth and SOA formation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Yuk-Chun Chan, Lyatt Jaegle, Pedro Campuzano-Jost, David C. Catling, Jihong Cole-Dai, Vasile I. Furdui, W. Andrew Jackson, Jose L. Jimenez, Dongwook Kim, Alanna E. Wedum, Becky Alexander
Summary: In this study, a global three-dimensional chemical transport model was used to simulate the production, transport, and deposition of perchlorate in the Earth's atmosphere. The model predictions were compared to observations, and it was found that the model could not fully explain the high levels of perchlorate observed at near-surface sites and the low O-17-excess observed in perchlorate sampled from pristine environments. Four hypotheses were discussed to explain these discrepancies and recommendations were made for further laboratory and field observations.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Multidisciplinary Sciences
J. M. Katich, E. C. Apel, I. Bourgeois, C. A. Brock, T. P. Bui, P. Campuzano-Jost, R. Commane, B. Daube, M. Dollner, M. Fromm, K. D. Froyd, A. J. Hills, R. S. Hornbrook, J. L. Jimenez, A. Kupc, K. D. Lamb, K. McKain, F. Moore, D. M. Murphy, B. A. Nault, J. Peischl, A. E. Perring, D. A. Peterson, E. A. Ray, K. H. Rosenlof, T. Ryerson, G. P. Schill, J. C. Schroder, B. Weinzierl, C. Thompson, C. J. Williamson, S. C. Wofsy, P. Yu, J. P. Schwarz
Summary: Pyrocumulonimbus (pyroCb) are wildfire-generated convective clouds that can inject smoke directly into the stratosphere. In situ measurements of pyroCb smoke reveal its distinctive and exceptionally stable aerosol properties and define the long-term influence of pyroCb activity on the stratospheric aerosol budget. Analysis of 13 years of airborne observations shows that pyroCb are responsible for 10 to 25% of the black carbon and organic aerosols in the present-day lower stratosphere, with similar impacts in both the North and South Hemispheres. These results suggest that, should pyroCb increase in frequency and/or magnitude in future climates, they could generate dominant trends in stratospheric aerosol.
Article
Engineering, Environmental
Demetrios Pagonis, Vanessa Selimovic, Pedro Campuzano-Jost, Hongyu Guo, Douglas A. Day, Melinda K. Schueneman, Benjamin A. Nault, Matthew M. Coggon, Joshua P. DiGangi, Glenn S. Diskin, Edward C. Fortner, Emily M. Gargulinski, Georgios I. Gkatzelis, Johnathan W. Hair, Scott C. Herndon, Christopher D. Holmes, Joseph M. Katich, John B. Nowak, Anne E. Perring, Pablo Saide, Taylor J. Shingler, Amber J. Soja, Laura H. Thapa, Carsten Warneke, Elizabeth B. Wiggins, Armin Wisthaler, Tara I. Yacovitch, Robert J. Yokelson, Jose L. Jimenez
Summary: Biomass burning particulate matter (BBPM) has significant impacts on air quality and climate, and this impact is expected to increase in the future. Studies have shown that the concentration of BBPM from North American fires is dependent on altitude, with airborne and high-altitude measurements showing a doubling of BBPM compared to ground-based measurements. The volatility of BBPM partially explains the observed differences in concentration across platforms.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Environmental Sciences
Kevin J. Nihill, Matthew M. Coggon, Christopher Y. Lim, Abigail R. Koss, Bin Yuan, Jordan E. Krechmer, Kanako Sekimoto, Jose L. Jimenez, Joost de Gouw, Christopher D. Cappa, Colette L. Heald, Carsten Warneke, Jesse H. Kroll
Summary: Biomass burning is a significant source of reactive organic carbon in the atmosphere. Experiments conducted as part of the FIREX FireLab campaign reveal that the atmospheric oxidation of organic carbon from biomass burning leads to the formation of smaller and more oxidized species. The oxidative evolution of biomass burning emissions appears to be independent of fuel type, resulting in a common aged distribution of gas-phase compounds consisting of small volatile oxygenates and various minor oxidized species and secondary organic aerosols.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Haihui Zhu, Randall V. Martin, Betty Croft, Shixian Zhai, Chi Li, Liam Bindle, Jeffrey R. Pierce, Rachel Y. -W. Chang, Bruce E. Anderson, Luke D. Ziemba, Johnathan W. Hair, Richard A. Ferrare, Chris A. Hostetler, Inderjeet Singh, Deepangsu Chatterjee, Jose L. Jimenez, Pedro Campuzano-Jost, Benjamin A. Nault, Jack E. Dibb, Joshua S. Schwarz, Andrew Weinheimer
Summary: This study uses a global chemical transport model to analyze airborne measurements from the United States and South Korea, and proposes a parameterization method for representing aerosol size. This method improves the agreement between the simulation model and ground-measured data.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Lucia Caudillo, Mihnea Surdu, Brandon Lopez, Mingyi Wang, Markus Thoma, Steffen Brakling, Angela Buchholz, Mario Simon, Andrea C. Wagner, Tatjana Mueller, Manuel Granzin, Martin Heinritzi, Antonio Amorim, David M. Bell, Zoe Brasseur, Lubna Dada, Jonathan Duplissy, Henning Finkenzeller, Xu-Cheng He, Houssni Lamkaddam, Naser G. A. Mahfouz, Vladimir Makhmutov, Hanna E. Manninen, Guillaume Marie, Ruby Marten, Roy L. Mauldin, Bernhard Mentler, Antti Onnela, Tuukka Petaja, Joschka Pfeifer, Maxim Philippov, Ana A. Piedehierro, Birte Rorup, Wiebke Scholz, Jiali Shen, Dominik Stolzenburg, Christian Tauber, Ping Tian, Antonio Tome, Nsikanabasi Silas Umo, Dongyu S. Wang, Yonghong Wang, Stefan K. Weber, Andre Welti, Marcel Zauner-Wieczorek, Urs Baltensperger, Richard C. Flagan, Armin Hansel, Jasper Kirkby, Markku Kulmala, Katrianne Lehtipalo, Douglas R. Worsnop, Imad El Haddad, Neil M. Donahue, Alexander L. Vogel, Andreas Kuerten, Joachim Curtius
Summary: The complete chemical characterization of nanoparticles is challenging due to their abundance but negligible mass. This study compares different techniques for the chemical composition analysis of secondary organic aerosol nanoparticles. The experiments were conducted at the CLOUD chamber, and simultaneous measurements were performed using four different techniques. The results generally agree on the important compounds found in the nanoparticles, but each technique captures different parts of the organic spectrum, potentially due to factors such as thermal decomposition or sampling artifacts.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Daniel John Katz, Aroob Abdelhamid, Harald Stark, Manjula R. Canagaratna, Douglas R. Worsnop, Eleanor C. Browne
Summary: Measurements of ambient ion chemical composition provide direct insight into the most acidic and basic trace gases and their ion-molecule clusters. The use of the atmospheric pressure interface time-of-flight mass spectrometer (APi-ToF) combined with binPMF analysis allows for the temporal evolution of compounds important for new particle formation and growth to be studied. The results showed that negative ions consist of strong acids, organosulfates, and clusters derived from monoterpene and sesquiterpene oxidation, while positive ions consist of alkyl pyridines and amines.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Jian Zhao, Ella Hakkinen, Frans Graeffe, Jordan E. Krechmer, Manjula R. Canagaratna, Douglas R. Worsnop, Juha Kangasluoma, Mikael Ehn
Summary: Highly oxygenated organic molecules (HOMs) are crucial for the formation of secondary organic aerosol (SOA), but the lack of suitable analytical techniques has limited our understanding of particle-phase HOM speciation and its relationship with gas-phase HOM formation. This study used a novel VIA-NO3-CIMS system to investigate the gas- and particle-phase HOM products of a-pinene ozonolysis. The results showed that gas-phase dimer formation was suppressed with the addition of CO or NO, but particle-phase dimers still constituted a considerable fraction of the observed SOA. Overall, the VIA-NO3-CIMS system showed promise for combined online gas- and particle-phase HOM measurements.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)
Article
Environmental Sciences
Laura Tomsche, Felix Piel, Tomas Mikoviny, Claus J. Nielsen, Hongyu Guo, Pedro Campuzano-Jost, Benjamin A. Nault, Melinda K. Schueneman, Jose L. Jimenez, Hannah Halliday, Glenn Diskin, Joshua P. DiGangi, John B. Nowak, Elizabeth B. Wiggins, Emily Gargulinski, Amber J. Soja, Armin Wisthaler
Summary: During the 2019 FIREX-AQ study, the NASA DC-8 conducted in situ chemical measurements on smoke plumes from wildfires and agricultural fires in the United States. The study found high levels of ammonia and particulate ammonium in the smoke plumes, with variations depending on the type of fire and region.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2023)