Article
Environmental Sciences
Yanhui Sun, Lin Liu, Ming Li, Xiaoxiao Chen, Fei Xu
Summary: Vanillin and vanillic acid are two lignin pyrolysis products generated by biomass combustion. The gas-phase oxidation mechanisms of vanillin and vanillic acid initiated by OH/NO3 radicals were investigated using density functional theory. The primary reactions involve OH/NO3 addition and H-atom abstraction, leading to the formation of various oxidation products. The total rate constants and atmospheric lifetimes of the oxidation processes were calculated, providing valuable information for further experimental research.
Article
Environmental Sciences
Mike J. Newland, Yangang Ren, Max R. McGillen, Lisa Michelat, Veronique Daele, Abdelwahid Mellouki
Summary: Furans are important volatile organic compounds emitted during biomass burning. This study found that the reaction of furans with the nitrate radical NO3 is the main removal process for furans in the atmosphere, except for gamma-crotonolactone.
ATMOSPHERIC CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Xu Yuan, Dongmei Zhang, Chiyu Liang, Xinxing Zhang
Summary: Freshman chemistry teaches that Fe3+ and Cu2+ ions are stable in water solutions, but their reduced forms, Fe2+ and Cu+, cannot exist in water as the major oxidation state due to the fast oxidation by O2 and/or disproportionation. However, significant fractions of dissolved Fe and Cu species exist in their reduced oxidation states in atmospheric water such as deliquesced aerosols, clouds, and fog droplets. By spraying the water solutions of transition metal ions into microdroplets, the study shows the spontaneous reduction of ligated Fe(III) and Cu(II) species into Fe(II) and Cu(I) species, suggesting a previously unknown source of reduced transition metal ions in atmospheric water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Environmental Sciences
Inmaculada Aranda, Sagrario Salgado, Pilar Martin, Florentina Villanueva, Ernesto Martinez, Beatriz Cabanas
Summary: This experimental study investigated the reactions of 3-ethoxy-1-propanol with Cl atoms, OH and NO3 radicals, measuring rate coefficients and identifying products. A reaction mechanism involving attack at the methylene group in the alpha-position to oxygen atoms was proposed. The tropospheric reactivity of 3-ethoxy-1-propanol was compared with other hydroxy ethers, and its atmospheric implications were assessed.
Article
Environmental Sciences
J. K. Nojgaard, L. Peker, J. B. Pernov, M. S. Johnson, R. Bossi, A. Massling, R. Lange, I. E. Nielsen, A. S. H. Prevot, A. C. Eriksson, F. Canonaco, H. Skov
Summary: This study characterized the chemical composition of non-refractory submicron aerosol (NR-PM1) at the Villum Research Station in North Greenland. The results showed that sulfate and organic species were the dominant components, with organic aerosol mainly originating from hydrocarbon-like organic aerosol (HOA) and oxidized organic aerosol (OOA). Additionally, a marine organic aerosol (MOA) of biogenic origin was identified, which was not only formed near Villum but also in the vicinity of the measurement site. Changes in transport patterns and sea ice conditions may influence the sources of MOA. Hence, further investigation into the ocean-atmosphere interactions and transport patterns on aerosol concentrations is crucial.
ATMOSPHERIC ENVIRONMENT
(2022)
Article
Chemistry, Multidisciplinary
Anita M. Avery, Mitchell W. Alton, Manjula R. Canagaratna, Jordan E. Krechmer, Donna T. Sueper, Nirvan Bhattacharyya, Lea Hildebrandt Ruiz, William H. Brune, Andrew T. Lambe
Summary: Cyclic volatile methyl siloxanes (cVMS) emitted from industrial processes and consumer products dominate the presence of volatile organic compounds (VOCs) in occupied spaces. These cVMS can undergo oxidation by gas-phase radicals, such as hydroxyl radicals (OH) and chlorine atoms (Cl), leading to the formation of secondary organic aerosols (SOA). While the SOA formation potential of cVMS with OH has been studied, the impact of Cl oxidation on SOA formation has not been explored.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Review
Chemistry, Analytical
Mathieu Galmiche, Olivier Delhomme, Yannis-Nicolas Francois, Maurice Millet
Summary: Interests in PAHs and their derivatives have been growing due to their toxicity. This review focuses on the separation and detection of PACs, with chromatography and mass spectrometry playing crucial roles in identifying and quantifying these compounds. Detection of PACs in environmental samples at ultratrace levels is possible with the sensitivity and specificity of mass spectrometry.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Olivia J. Jenks, Marla P. DeVault, Anna C. Ziola, Melissa A. Morris, Melinda K. Schueneman, Harald Stark, Jose L. Jimenez, Paul J. Ziemann, Joost A. de Gouw
Summary: Organic aerosols have various impacts on climate, visibility, and human health. This study investigates the oxidation of biogenic volatile organic compounds by NO3 radicals to form secondary organic aerosols. The analysis of the first-generation gas-phase products of this reaction provides insights into the sources of organic nitrate in the atmosphere. The results can aid in the interpretation of field data and improve the representation of this chemistry in models.
ACS EARTH AND SPACE CHEMISTRY
(2023)
Article
Energy & Fuels
B. Apicella, C. Russo, A. Carpentieri, A. Tregrossi, A. Ciajolo
Summary: Distinguishing features between organic carbon and soot are crucial for understanding their origins and environmental impacts. Laser desorption time-of-flight mass spectrometry is an effective method for identifying PAHs in both low and high mass modes of organic carbon.
Article
Environmental Sciences
Weiqi Xu, Wei Zhou, Zhijie Li, Qingqing Wang, Aodong Du, Bo You, Lu Qi, Andre S. H. Prevot, Junji Cao, Zifa Wang, Jiang Zhu, Yele Sun
Summary: The reductions in traffic-related emissions and fossil fuel-related organic aerosols during the 2021 Chinese New Year in Beijing were smaller than previous years, while the concentrations of secondary aerosol species increased due to a severe haze episode. The composition of organic aerosols also changed, with an increase in oxidized primary aerosols and a decrease in aqueous-phase secondary aerosols.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Shijie Liu, Yiqian Wang, Xinbei Xu, Gehui Wang
Summary: This study provides new insight into the effect of NO2 on SOA formation through the change in o-xylene photooxidation under different RH conditions, and the complex effect of multiple environmental factors on SOA formation was also important and should not be ignored.
Article
Geosciences, Multidisciplinary
Julia Schmale, Andrea Baccarini
Summary: New particle formation and growth play a crucial role in providing cloud condensation nuclei for the Arctic atmosphere, influencing cloud formation and the Arctic energy budget. Beck et al. shed light on the complex processes of NPF and growth at Arctic locations, revealing diverse chemical drivers and sources across the region. Further studies are needed to gain a systematic understanding of NPF and growth in various Arctic environments throughout all seasons.
GEOPHYSICAL RESEARCH LETTERS
(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
Chemistry, Analytical
Xin Xu, Hongwei Pang, Chao Liu, Kangyi Wang, Gwendal Loisel, Lei Li, Sasho Gligorovski, Xue Li
Summary: Human presence can affect indoor air quality by producing secondary organic compounds through reactions with indoor oxidants. We used real time analysis to measure the gas-phase product compounds generated by the reaction of exhaled human breath with ozone. The detected compounds suggest that human breath can contribute to harmful secondary products and further studies should evaluate their potential health effects.
ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
(2022)
Article
Engineering, Environmental
Joses Grady Nathanael, Bing Yuan, Uta Wille
Summary: This study investigated the rate of oxidative damage of aliphatic amino acids and dipeptides by the environmental pollutant nitrate radical (NO3 center dot) in an aqueous acidic environment. The reactivity of amino acid residues with secondary and tertiary amide bonds decreased compared to that in acetonitrile. Density functional theory studies showed that the lower reactivity was due to protonation of the amide moiety. In neutral water, hydrogen bonding with the amide had little impact on the reaction rate.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Yuqin Wang, Benjamin de Foy, James J. Schauer, Michael R. Olson, Yang Zhang, Zhengqiang Li, Yuanxun Zhang
ENVIRONMENTAL POLLUTION
(2017)
Article
Environmental Sciences
Wei Huang, Dongqing Fang, Jing Shang, Zhengqiang Li, Yang Zhang, Peng Huo, Zhaoying Liu, James J. Schauer, Yuanxun Zhang
ATMOSPHERIC ENVIRONMENT
(2018)
Article
Environmental Sciences
Pengrui Du, Rui Du, Weishan Ren, Zedong Lu, Yang Zhang, Pingqing Fu
ATMOSPHERIC ENVIRONMENT
(2018)
Article
Chemistry, Analytical
Haixu Zhang, Pengkun Ma, Jinian Shu, Bo Yang, Jingyun Huang
ANALYTICA CHIMICA ACTA
(2018)
Article
Chemistry, Analytical
Jingyun Huang, Bo Yang, Jinian Shu, Zuojian Zhang, Zhen Li, Kui Jiang
ANALYTICAL CHEMISTRY
(2019)
Article
Environmental Sciences
Jing Shang, Reza Bashiri Khuzestani, Jingyu Tian, James J. Schauer, Jinxi Hua, Yang Zhang, Tianqi Cai, Dongqing Fang, Jianxiong An, Yuanxun Zhang
ENVIRONMENTAL POLLUTION
(2019)
Article
Environmental Sciences
Peng Zhang, Pengkun Ma, Jinian Shu, Jingyun Huang, Bo Yang, Haixu Zhang
ATMOSPHERIC ENVIRONMENT
(2019)
Article
Environmental Sciences
Peng Zhang, Jingyun Huang, Jinian Shu, Pengkun Ma, Bo Yang
ATMOSPHERIC ENVIRONMENT
(2019)
Article
Environmental Sciences
Zhiqiang Tan, Qingsheng Bai, Yongguang Yin, Yang Zhang, Qiang Chen, Myeong Hee Moon, Jingfu Liu
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Environmental Sciences
Bi'an Zhou, Tianyi Zhao, Jian Ma, Yuanxun Zhang, Lijia Zhang, Peng Huo, Yang Zhang
Summary: The study found that VOC pollution in the suburbs of Beijing after the coal to electricity project was mainly caused by local emissions. The contribution of coal combustion to VOCs increased significantly, but the TVOCs concentration was lower than before heating. Most of the selected VOC species had carcinogenic risks above the acceptable level.
Article
Multidisciplinary Sciences
Jue Zhao, Ling Jin, Dong Wu, Jia-wen Xie, Jun Li, Xue-wu Fu, Zhi-yuan Cong, Ping-qing Fu, Yang Zhang, Xiao-san Luo, Xin-bin Feng, Gan Zhang, James M. Tiedje, Xiang-dong Li
Summary: This study analyzed the bacterial communities in airborne particulate samples from around the world and found that they have a biogeographic pattern and interact with surface environments. While the total abundance of airborne bacteria is lower than other habitats, the number of bacterial taxa is comparable to the hydrosphere and is highest in midlatitude regions. The structure of the airborne bacterial community is easily perturbed and influenced by surface microbiomes and atmospheric conditions, particularly in urban areas. These findings provide valuable insights for predicting microbial responses and health impacts in different environments.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Environmental Sciences
Tianyi Zhao, Yu Yan, Bian Zhou, Xuezhen Zhong, Xiaoyu Hu, Lijia Zhang, Peng Huo, Kang Xiao, Yuanxun Zhang, Yang Zhang
Summary: This study investigated the interaction between Water-Soluble Organic Compounds (WSOCs) and Transition Metals (TMs) and its impact on Reactive Oxygen Species (ROS) generation. The results showed that the interaction between WSOCs and TMs significantly affected ROS generation, with the organic compound SRFA exhibiting a stronger ability to complex with TMs and facilitate ROS generation.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Chemistry, Analytical
Shiyu Cheng, Zitao Yan, Lixin Shan, Jingyun Huang, Zhangqi Yu, Zhiyang Wei, Haijie Wang, Zhen Li, Bo Yang, Jinian Shu
Summary: A novel high-flux EUV light source is developed using a microchannel plate (MCP) window in this study, which has many application prospects in scientific research, especially in mass spectrometry.
ANALYTICAL CHEMISTRY
(2023)
Article
Environmental Sciences
Reza Bashiri Khuzestani, James J. Schauer, Yongjie Wei, Yang Zhang, Yuanxun Zhang
ATMOSPHERIC ENVIRONMENT
(2017)
Article
Chemistry, Analytical
Bo Yang, Haixu Zhang, Jinian Shu, Pengkun Ma, Peng Zhang, Jingyun Huang, Zhen Li, Ce Xu
ANALYTICAL CHEMISTRY
(2018)
Article
Environmental Sciences
Muhammad Waqas, Majid Nazeer, Man Sing Wong, Wu Shaolin, Li Hon, Joon Heo
Summary: The socio-economic restriction measures implemented in the United States have significantly reduced nitrogen dioxide (NO2) emissions. The study highlights the impact of factors such as human mobility, population density, income, climate, and stationary sources on the reduction of NO2 at different stations. The research emphasizes the scientific impacts of the NO2 reduction and income inequality revealed by the pandemic on air quality and health disparities.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Guorui Zhi, Jinhong Du, Aizhong Chen, Wenjing Jin, Na Ying, Zhihui Huang, Peng Xu, Di Wang, Jinghua Ma, Yuzhe Zhang, Jiabao Qu, Hao Zhang, Li Yang, Zhanyun Ma, Yanjun Ren, Hongyan Dang, Jianglong Cui, Pengchuan Lin, Zhuoshi He, Jinmin Zhao, Shuo Qi, Weiqi Zhang, Wenjuan Zhao, Yingxin Li, Qian Liu, Chen Zhao, Yi Tang, Peng Wei, Jingxu Wang, Zhen Song, Yao Kong, Xiangzhe Zhu, Yi Shen, Tianning Zhang, Yangxi Chu, Xinmin Zhang, Jiafeng Fu, Qingxian Gao, Jingnan Hu, Zhigang Xue
Summary: An comprehensive emission inventory for China in 2019, which includes both air pollutants and greenhouse gases, was developed in this study. The inventory utilizes existing frameworks and data to provide comparable emissions data and demonstrates the relationship between emissions and economic development.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
I-Ting Ku, Yong Zhou, Arsineh Hecobian, Katherine Benedict, Brent Buck, Emily Lachenmayer, Bryan Terry, Morgan Frazier, Jie Zhang, Da Pan, Lena Low, Amy Sullivan, Jeffrey L. Collett Jr
Summary: Unconventional oil and natural gas development (UOGD) in the United States has expanded rapidly in recent decades, raising concerns about its impact on air quality. This study conducted extensive air monitoring during the development of several large well pads in Broomfield, Colorado, providing a unique opportunity to examine changes in local air toxics and VOC concentrations during well drilling and completions and production. The study identified significant increases in VOC concentrations during drilling operations, highlighting the importance of emissions from synthetic drilling mud. The findings suggest opportunities to mitigate emissions during UOGD operations.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Puji Lestari, Akbar R. Tasrifani, Wiranda I. Suri, Martin J. Wooster, Mark J. Grosvenor, Yusuke Fujii, Vissia Ardiyani, Elisa Carboni, Gareth Thomas
Summary: This study developed field emission factors for various pollutants in peatland fires and estimated the total emissions. Gas samples were collected using an analyzer, while particulate samples were collected using air samplers. The study found significant emissions of CO2, CO, PM2.5, carbon aerosols, water-soluble ions, and elements from the fires in Central Kalimantan, Indonesia in 2019.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Ligang Li, Yuyu Chen, Lu Fan, Dong Sun, Hu He, Yongshou Dai, Yong Wan, Fangfang Chen
Summary: A high-precision retrieval method based on a deep convolutional neural network and satellite remote sensing data is proposed to obtain accurate methane vertical profiles.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Hyung Joo Lee, Toshihiro Kuwayama, Michael Fitzgibbon
Summary: This study investigated the changes in nitrogen dioxide (NO2) air pollution levels and their disparities in California, U.S. during the pandemic of coronavirus disease 2019 (COVID-19). The results showed a decrease in NO2 concentrations, especially in urban and high-traffic areas. However, socially vulnerable populations still experienced higher levels of NO2 exposure. The study suggests that reducing NO2 disparities, particularly racial inequity, can be achieved through continued regulatory actions targeting traffic-related NOx emissions.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Maria Chiara Pietrogrande, Beatrice Biffi, Cristina Colombi, Eleonora Cuccia, Umberto Dal Santo, Luisa Romanato
Summary: This study investigates the chemical composition and oxidative potential of PM10 particles in the Po Valley, Italy, and demonstrates the impact of high levels of atmosphere ammonia. The rural area had significantly higher ammonia concentrations compared to the urban site, resulting in higher levels of secondary inorganic aerosol. Although the SIA components did not contribute significantly to the PM10 oxidative reactivity, they were correlated with the oxidative potential measurements. This suggests that the contribution of SIA to PM oxidative toxicity cannot be ignored.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Natalie Allen, Jan Gacnik, Sarrah M. Dunham-Cheatham, Mae Sexauer Gustin
Summary: Accurate measurement of atmospheric reactive mercury is challenging due to its reactivity and low concentrations. The University of Nevada, Reno Reactive Mercury Active System (RMAS) has been shown to be more accurate than the industry standard, but has limitations including long time resolution and sampling biases. Increasing the sampling flow rate negatively affected RM concentrations, but did not impact the chemical composition of RM captured on membranes.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Chin-Yu Hsu, Wei-Ting Hsu, Ching-Yi Mou, Pei-Yi Wong, Chih-Da Wu, Yu-Cheng Chen
Summary: This study estimated the daily exposure concentrations of PM2.5 for elderly individuals residing in different regions of Taiwan using land use regression with machine learning (LUR_ML) and microenvironmental exposure (ME) models. The accuracy of the models varied across regions, with the ME models exhibiting higher predictions and lower biases. The use of region-specific microenvironmental measurements in the ME model showed potential for accurate prediction of personal PM2.5 exposure.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xiaohan Si, Kerrie Mengersen, Chuchu Ye, Wenbiao Hu
Summary: This study found that there is an interactive effect between air pollutants and weather factors, which significantly affects influenza transmission. Future research should consider the interactive effects between pollutants and temperature or humidity to evaluate the environment-influenza association.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Luxi Xu, Ruijun Xu, Yunshao Ye, Rui Wang, Jing Wei, Chunxiang Shi, Qiaoxuan Lin, Ziquan Lv, Suli Huang, Qi Tian, Yuewei Liu
Summary: This study aimed to evaluate the impact of ambient air pollution on hospital admissions for angina. The results showed that exposure to ambient particulate matter, sulfur dioxide, nitrogen dioxide, carbon monoxide, and ozone are associated with an increased risk of hospital admissions for angina. The association with nitrogen dioxide exposure was found to be the strongest.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Xinyu Yu, Man Sing Wong, Majid Nazeer, Zhengqiang Li, Coco Yin Tung Kwok
Summary: This study proposes a novel method to address the challenge of missing values in satellite-derived AOD products and creates a comprehensive daily AOD dataset for the Guangdong-Hong Kong-Macao Greater Bay Area. By reconstructing missing values and developing a new model, the derived dataset outperforms existing products and agrees well with ground-based observations. Additionally, the dataset exhibits consistent temporal patterns and more spatial details.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Yidan Zhang, Yifan Xu, Bo Peng, Wu Chen, Xiaoyu Cui, Tianle Zhang, Xi Chen, Yuan Yao, Mingjin Wang, Junyi Liu, Mei Zheng, Tong Zhu
Summary: This study developed a sensitive method to measure the metallic components of atmospheric fine particulate matter (PM2.5) and compared the results with different analysis methods. The concentrations of metallic components in personal PM2.5 samples were found to be significantly different from corresponding fixed-site samples. Personal sampling can reduce exposure misclassifications, and measuring metallic components is useful for exploring health risks and identifying sources of PM2.5.
ATMOSPHERIC ENVIRONMENT
(2024)
Review
Environmental Sciences
Jamie Leonard, Lea Ann El Rassi, Mona Abdul Samad, Samantha Prehn, Sanjay K. Mohanty
Summary: Increasing concentrations of microplastics in the Earth's atmosphere could have adverse effects on ecosystems and human health. The deposition rate of airborne microplastics is influenced by both land use and climate, and a global analysis suggests that climate may have a greater impact on the concentration and deposition rate of microplastics than land use.
ATMOSPHERIC ENVIRONMENT
(2024)
Article
Environmental Sciences
Tian Zhou, Xiaowen Zhou, Zining Yang, Carmen Cordoba-Jabonero, Yufei Wang, Zhongwei Huang, Pengbo Da, Qiju Luo, Zhijuan Zhang, Jinsen Shi, Jianrong Bi, Hocine Alikhodja
Summary: This study investigated the long-range transport and effects of North African and Middle Eastern dust in East Asia using lidar observations and model simulations. The results showed that the dust originated from multiple sources and had a long transport time. The vertical distribution of the dust was found to be crucial for assessing its impacts.
ATMOSPHERIC ENVIRONMENT
(2024)
